Er₅Ni₃Al₃Ge₄: a quaternary variant of the NbCoB type

Single crystals of penta­erbium trinickel trialuminium tetra­germanium were synthesized from the elements by arc-melting. The novel compound crystallizes in the space group Pmmn, e⁶b²a, with all nine crystallographically unique atoms in special positions of site symmetries m.. and mm2. This compound represents a new ordered variant of the NbCoB type. Its two-layer structure is described as an inter­growth of the Er₃NiAl₃Ge₂ (Y₃NiAl₃Ge₂ type) and ErNiGe (TiNiSi type) structures. The coordination polyhedra are distorted penta­gonal prisms around Er atoms, tetra­gonal prisms around Al and Ni atoms, and trigonal prisms around Ge and Ni atoms, capped with eight, four and three extra vertices, respectively.

S1. Comment

Rare-earth intermetallics of different compositions have received attention because of their interesting and useful physical properties, e.g. the coexistence of superconductivity and magnetism, the Kondo effect, and the magnetocaloric effect. The search for new intermetallic phases is necessary for the development of new materials and the accurate determination of their crystal structures is the basic requirement for a better understanding of their physical properties. The NbCoB structure type was discovered by Krypyakevich et al. (1971). Since then, only one other representative, TaCoB (Kuz'ma & Rudakevich, 1973), has been found among intermetallics. Recently, Fedorchuk et al. (2005) reported the existence of Yb₅Mg₃Ga₇, which represents a new type of ordering in the NbCoB structure. The title compound, Er₅Ni₃Al₃Ge₄, which is yet another quaternary variant of the NbCoB type, was obtained during a systematic investigation of the Er–Ni–Al–Ge system. We present here the results of a single-crystal structure study.

A projection of the Er₅Ni₃Al₃Ge₄ unit cell on to the (100) plane is shown in Fig. 1. The coordination polyhedra of the atoms are distorted pentagonal, tetragonal and trigonal prisms with eight, four and three extra vertices, as shown in Fig. 2. The coordination around atom Er1 (site symmetry m..) consists of 18 atoms, if bonding interactions up to 4.2 Å are included, resulting in a distorted pentagonal prism with eight additional vertices, [Er1Ge₅Ni₄Al₂Er₇] (a in Fig. 2). The coordination polyhedra around atom Er2 and Er3 (site symmetry m.. and mm2 and bonding interactions < 4.2 Å) are similar pentagonal prisms with eight additional vertices of composition [Er2Ni₄Ge₅Al₄Er₅] (b) and [Er3Ni₂Ge₄Al₆Er₆] (c), respectively. The coordination polyhedra around the Ge atoms (site symmetry m..) are trigonal prisms (bonding interactions < 3 Å), viz. tricapped [Ge1Ni₃AlEr₅] (d) and tricapped [Ge2NiAl₂Er₆] (e). These trigonal prisms are deformed so that the height/width ratio of the prisms, c/a, is 1.18. Two types of prisms are observed for the Ni atoms. Atom Ni1 (site symmetry m.. and bonding interactions < 3.3 Å) centres a deformed tetragonal prism, [Ni1Ge₄Er₆Ni₂] (f). The coordination polyhedron for atom Ni2 (site symmetry mm2, bonding interactions < 3 Å) is a deformed (c/a = 1.54) trigonal prism, [Ni2Al₆Er₃] (g). The coordination polyhedra around the Al atoms (site symmetry m.. for Al1 and mm2 for Al2) are deformed tetragonal prisms (bonding interactions < 3.3 Å), viz. tetracapped [Al1Ni₂Al₂Ge₂Er₆] (h) and [Al2Ni₂Ge₂Al₂Er₆] (i). These deformed tetragonal prisms centered by Al and Ni1 may also be considered as distorted cuboctahedra. The structure of Er₅Ni₃Al₃Ge₄ belongs to class #10 [coordination number 6 + n (n = 0–5) for the smallest atom, a trigonal prism and its derivatives as coordination polyhedron) according to the classification scheme of Krypyakevich (1977).

The interatomic distances (Table 1) are in good agreement with the sums of the atomic radii (Emsley, 1991). The shortest Er3—Ni2 [2.798 (4) Å = 93.2% of the sum of the atomic radii] and Al1—Al2 [2.716 (6) Å = 94.9% of twice the Al atomic radius) distances indicate partial covalent bonding.

Er₅Ni₃Al₃Ge₄ is a quaternary ordered variant of the NbCoB type (Krypyakevich et al., 1971). The Er atoms substitute for Nb, the Ge and Ni2 atoms substitute for B, and the Al and Ni1 atoms substitute for Co. ErNiGe (Fig. 3a) adopts the TiNiSi structure type (Gorelenko et al., 1984; Brink Shoemaker & Shoemaker, 1965) and Er₃NiAl₃Ge₂ (Fig. 3b) adopts the Y₃NiAl₃Ge₂ structure type (Demchenko et al., 2005; Zhao & Parthé, 1990). Er₅Ni₃Al₃Ge₄ can be described as a 1:1 intergrowth of fragments of the [Er₂Ni₂Ge₂] and [Er₃NiAl₃Ge₂] structures. The feature common to these three structures is a puckered sheet of edge-connected columns of trigonal prisms. Er₅Ni₃Al₃Ge₄ belongs to the family of two-layer compounds. More than 70 other inorganic structure types belong to this family according to the compilation in TYPIX (Parthé et al., 1993–1994).

S2. Experimental

The single-crystal used in this work was extracted from an alloy of nominal composition Er₂₅Ni₂₅Al₃₀Ge₂₀. The alloy was prepared by arc melting the elements (purity greater than 99.9% for Ni, Al and Ge, and 99.84% for Er) in an electric arc furnace with a water-cooled copper hearth under an argon atmosphere with a Ti-getter. The alloy was then annealed in an evacuated silica tube at 870 K for 350 h. A preliminary crystal investigation was performed using Laue and rotation methods (RKV-86 and RGNS-2 chambers, Mo Kα radiation). The chemical composition of the crystal was determined with an energy dispersive PV9800 X-ray spectrometer using a standardless procedure. The result of the EDX analysis is 36.47% Er, 19.72% Ni, 17.32% Al, 26.50% Ge (in atom%, with an accuracy of 2%). These values are very close to the composition obtained from the structural refinement. No impurities were found.

S3. Refinement

The analysis of the systematic absences using the program ABSEN (McArdle, 1996) led to the extinction symbol P– −n and possible space groups Pm2₁n, P2₁mn and centrosymmetric Pmmn. A statistical test of the distribution of the E values using the program E-STATS from WinGX system (Farrugia, 1999) suggested that the structure is centrosymmetric with a probability of 80%. Taking into account some notes on choosing a centre of symmetry (Marsh, 1995), the structure solution and refinement were also performed in the non-centrosymmetric group. The results clearly indicated that Er₅Ni₃Al₃Ge₄ crystallizes in the centrosymmetric space group Pmmn, since the solution and refinement in the non-centrosymmetric variants were less satisfactory and resulted in larger R indices and atomic displacement parameters. The atomic coordinates were standardized using the STRUCTURE TIDY program (Gelato & Parthé, 1987). The highest residual electron density peak is 0.97 Å from Er3 and the deepest hole is 0.95 Å from Er2.

Computing details

Data collection: KM4B8 Software (Galdecki et al., 1996); cell refinement: KM4B8 Software; data reduction: KM4B8 Software; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: DIAMOND (Brandenburg, 1999); software used to prepare material for publication: SHELXL97.

Figures

	Fig. 1. Coordination polyhedra around Er1–Er3 (a, b and c), Ge1 and Ge2 (d and e), Ni1 and Ni2 (f and g), and Al1 and Al2 (h and i) in the Er5Ni3Al3Ge4 structure
	Fig. 2. Projection of the unit-cell on to the (100) plane, with displacement ellipsoids drawn at the 95% probability level. [Symmetry codes: (i) x, y, z; (ii) −x + 1/2, −y + 3/2, z; (iii) x + 1/2, −y + 1, −z + 1; (iv) −x + 1, y − 1/2, −z + 1; (v) −x + 1/2, −y + 1/2, z; (vi) −x + 1, y + 1/2, −z + 1.]
	Fig. 3. Intergrowth fragments of (a) ErNiGe and (b) Er3NiAl3Ge2. The broken and solid lines correspond to the lower and upper layers, respectively.

pentaerbium trinickel trialuminium tetragermanium

Crystal data

Er5Ni3Al3Ge4	F(000) = 1182
Mr = 1383.73	Dx = 8.481 Mg m^−3
Orthorhombic, Pmmn	Cu Kα radiation, λ = 1.54178 Å
Hall symbol: -P 2ab 2a	Cell parameters from 18 reflections
a = 4.1561 (6) Å	θ = 15–33°
b = 19.069 (1) Å	µ = 87.55 mm^−1
c = 6.8369 (5) Å	T = 295 K
V = 541.84 (9) Å^3	Elongated prism, metallic dark grey
Z = 2	0.11 × 0.02 × 0.01 mm

Data collection

Kuma KM-4 diffractometer	501 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tube	Rint = 0.085
Graphite monochromator	θmax = 68.0°, θmin = 4.6°
ω–2θ scans	h = −5→4
Absorption correction: for a cylinder mounted on the ϕ axis (Dwiggins, 1975)	k = −22→14
Tmin = 0.169, Tmax = 0.382	l = −8→8
3581 measured reflections	3 standard reflections every 100 reflections
580 independent reflections	intensity decay: 2%

Refinement

Refinement on F^2	Primary atom site location: structure-invariant direct methods
Least-squares matrix: full	Secondary atom site location: difference Fourier map
R[F^2 > 2σ(F^2)] = 0.043	w = 1/[σ^2(Fo^2) + (0.0783P)^2 + 0.734P] where P = (Fo^2 + 2Fc^2)/3
wR(F^2) = 0.111	(Δ/σ)max = 0.001
S = 1.16	Δρmax = 3.99 e Å^−3
580 reflections	Δρmin = −2.75 e Å^−3
50 parameters	Extinction correction: SHELXL97, Fc^*=kFc[1+0.001xFc^2λ^3/sin(2θ)]^-1/4
0 restraints	Extinction coefficient: 0.00070 (11)

Special details

Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.

Refinement. Refinement of F² against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F², conventional R-factors R are based on F, with F set to zero for negative F². The threshold expression of F² > σ(F²) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F² are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Ų)

	x	y	z	Uiso*/Ueq
Er1	0.2500	0.57155 (5)	0.49989 (10)	0.0180 (4)
Er2	0.2500	0.61950 (5)	0.99676 (11)	0.0175 (4)
Er3	0.2500	0.7500	0.61585 (17)	0.0178 (4)
Ge1	0.2500	0.03874 (9)	0.7965 (2)	0.0177 (5)
Ge2	0.2500	0.14615 (8)	0.2890 (2)	0.0172 (5)
Ni1	0.2500	0.02588 (14)	0.1663 (4)	0.0199 (6)
Ni2	0.2500	0.7500	0.2066 (5)	0.0217 (9)
Al1	0.2500	0.1784 (2)	0.6850 (6)	0.0134 (9)
Al2	0.2500	0.2500	0.0285 (8)	0.0137 (13)

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
Er1	0.0247 (7)	0.0162 (6)	0.0132 (6)	0.000	0.000	−0.0013 (3)
Er2	0.0242 (7)	0.0162 (6)	0.0122 (6)	0.000	0.000	0.0009 (3)
Er3	0.0249 (7)	0.0153 (6)	0.0133 (6)	0.000	0.000	0.000
Ge1	0.0216 (10)	0.0174 (9)	0.0141 (8)	0.000	0.000	−0.0024 (6)
Ge2	0.0223 (10)	0.0164 (9)	0.0130 (9)	0.000	0.000	0.0004 (6)
Ni1	0.0239 (15)	0.0163 (13)	0.0193 (12)	0.000	0.000	0.0010 (10)
Ni2	0.028 (2)	0.0212 (19)	0.0160 (18)	0.000	0.000	0.000
Al1	0.018 (2)	0.0109 (19)	0.0108 (18)	0.000	0.000	0.0013 (14)
Al2	0.022 (4)	0.009 (3)	0.011 (2)	0.000	0.000	0.000

Geometric parameters (Å, º)

Er1—Ge2^i	2.9027 (13)	Ge1—Er1^xvi	2.9690 (14)
Er1—Ge2^ii	2.9027 (13)	Ge1—Er1^xvii	2.9690 (14)
Er1—Ge1^iii	2.9215 (18)	Ge1—Er2^iii	3.314 (2)
Er1—Ni1^iii	2.942 (3)	Ge2—Ni1	2.442 (3)
Er1—Ge1^ii	2.9690 (14)	Ge2—Al2	2.663 (4)
Er1—Ge1^i	2.9690 (14)	Ge2—Al1	2.777 (4)
Er1—Al1^i	3.173 (3)	Ge2—Er2^xvi	2.8971 (12)
Er1—Al1^ii	3.173 (3)	Ge2—Er2^xvii	2.8971 (12)
Er1—Ni1^i	3.207 (2)	Ge2—Er1^xvii	2.9027 (13)
Er1—Ni1^ii	3.207 (2)	Ge2—Er1^xvi	2.9027 (13)
Er1—Er1^iv	3.4299 (15)	Ge2—Er3^v	2.9433 (12)
Er1—Er1^v	3.4299 (15)	Ge2—Er3^iv	2.9433 (12)
Er1—Er3	3.4940 (9)	Ni1—Ge1^xii	2.4293 (18)
Er1—Er2	3.5180 (10)	Ni1—Ge1^xiii	2.4293 (18)
Er1—Er2^vi	3.5593 (10)	Ni1—Ge1^vi	2.540 (3)
Er2—Ni2^vii	2.873 (2)	Ni1—Er1^iii	2.942 (3)
Er2—Ge2^ii	2.8971 (12)	Ni1—Er2^xvii	2.9576 (19)
Er2—Ge2^i	2.8971 (13)	Ni1—Er2^xvi	2.9576 (19)
Er2—Ge1^viii	2.9475 (13)	Ni1—Er2^xviii	3.005 (3)
Er2—Ge1^ix	2.9475 (13)	Ni1—Er1^xvii	3.207 (2)
Er2—Ni1^ii	2.9576 (19)	Ni1—Er1^xvi	3.207 (2)
Er2—Ni1^i	2.9576 (19)	Ni2—Al1^v	2.594 (3)
Er2—Ni1^x	3.005 (3)	Ni2—Al1^ii	2.594 (3)
Er2—Al1^ix	3.212 (3)	Ni2—Al1^i	2.594 (3)
Er2—Al1^viii	3.212 (3)	Ni2—Al1^iv	2.594 (3)
Er2—Al2^v	3.2467 (8)	Ni2—Al2^xix	2.627 (4)
Er2—Al2^iv	3.2467 (8)	Ni2—Al2^xx	2.627 (4)
Er2—Ge1^iii	3.314 (2)	Ni2—Er2^vi	2.873 (2)
Er2—Er1^vii	3.5593 (10)	Ni2—Er2^xxi	2.873 (2)
Er2—Er3	3.6020 (12)	Al1—Ni2^v	2.594 (3)
Er3—Ni2	2.798 (4)	Al1—Ni2^iv	2.594 (3)
Er3—Ge2^v	2.9433 (12)	Al1—Al2^vii	2.716 (6)
Er3—Ge2^ii	2.9433 (12)	Al1—Al1^iii	2.729 (8)
Er3—Ge2^i	2.9433 (12)	Al1—Er1^xvi	3.173 (3)
Er3—Ge2^iv	2.9433 (12)	Al1—Er1^xvii	3.173 (3)
Er3—Al2^v	3.198 (5)	Al1—Er2^xiv	3.212 (3)
Er3—Al2^iv	3.198 (5)	Al1—Er2^xv	3.212 (3)
Er3—Al1^ii	3.227 (3)	Al1—Er3^iv	3.227 (3)
Er3—Al1^iv	3.227 (3)	Al1—Er3^v	3.227 (3)
Er3—Al1^i	3.227 (3)	Al2—Ni2^xix	2.627 (4)
Er3—Al1^v	3.227 (3)	Al2—Ni2^xx	2.627 (4)
Er3—Er1^xi	3.4940 (9)	Al2—Ge2^iii	2.663 (4)
Er3—Er2^xi	3.6020 (12)	Al2—Al1^vi	2.716 (6)
Ge1—Ni1^xii	2.4293 (18)	Al2—Al1^xviii	2.716 (6)
Ge1—Ni1^xiii	2.4293 (18)	Al2—Er3^v	3.198 (5)
Ge1—Ni1^vii	2.540 (3)	Al2—Er3^iv	3.198 (5)
Ge1—Al1	2.771 (4)	Al2—Er2^v	3.2467 (8)
Ge1—Er1^iii	2.9215 (18)	Al2—Er2^xvi	3.2467 (8)
Ge1—Er2^xiv	2.9475 (13)	Al2—Er2^iv	3.2467 (8)
Ge1—Er2^xv	2.9475 (13)	Al2—Er2^xvii	3.2467 (8)
Ge2^i—Er1—Ge2^ii	91.43 (5)	Al1^i—Er3—Er2^xi	138.85 (5)
Ge2^i—Er1—Ge1^iii	90.44 (4)	Al1^v—Er3—Er2^xi	99.71 (7)
Ge2^ii—Er1—Ge1^iii	90.44 (4)	Er1—Er3—Er2^xi	146.81 (4)
Ge2^i—Er1—Ni1^iii	134.03 (3)	Er1^xi—Er3—Er2^xi	59.417 (19)
Ge2^ii—Er1—Ni1^iii	134.03 (3)	Ni2—Er3—Er2	136.301 (18)
Ge1^iii—Er1—Ni1^iii	94.79 (7)	Ge2^v—Er3—Er2	107.76 (4)
Ge2^i—Er1—Ge1^ii	160.68 (5)	Ge2^ii—Er3—Er2	51.34 (3)
Ge2^ii—Er1—Ge1^ii	86.65 (3)	Ge2^i—Er3—Er2	51.34 (3)
Ge1^iii—Er1—Ge1^ii	108.78 (4)	Ge2^iv—Er3—Er2	107.76 (4)
Ni1^iii—Er1—Ge1^ii	48.53 (4)	Al2^v—Er3—Er2	56.66 (4)
Ge2^i—Er1—Ge1^i	86.65 (3)	Al2^iv—Er3—Er2	56.66 (4)
Ge2^ii—Er1—Ge1^i	160.68 (5)	Al1^ii—Er3—Er2	99.71 (7)
Ge1^iii—Er1—Ge1^i	108.78 (4)	Al1^iv—Er3—Er2	138.85 (5)
Ni1^iii—Er1—Ge1^i	48.53 (4)	Al1^i—Er3—Er2	99.71 (7)
Ge1^ii—Er1—Ge1^i	88.84 (5)	Al1^v—Er3—Er2	138.85 (5)
Ge2^i—Er1—Al1^i	54.16 (7)	Er1—Er3—Er2	59.417 (19)
Ge2^ii—Er1—Al1^i	110.61 (7)	Er1^xi—Er3—Er2	146.81 (4)
Ge1^iii—Er1—Al1^i	137.63 (5)	Er2^xi—Er3—Er2	87.40 (4)
Ni1^iii—Er1—Al1^i	95.56 (8)	Ni1^xii—Ge1—Ni1^xiii	117.61 (14)
Ge1^ii—Er1—Al1^i	108.77 (7)	Ni1^xii—Ge1—Ni1^vii	81.18 (9)
Ge1^i—Er1—Al1^i	53.50 (7)	Ni1^xiii—Ge1—Ni1^vii	81.18 (9)
Ge2^i—Er1—Al1^ii	110.61 (7)	Ni1^xii—Ge1—Al1	121.10 (7)
Ge2^ii—Er1—Al1^ii	54.16 (7)	Ni1^xiii—Ge1—Al1	121.10 (7)
Ge1^iii—Er1—Al1^ii	137.63 (5)	Ni1^vii—Ge1—Al1	111.51 (12)
Ni1^iii—Er1—Al1^ii	95.56 (8)	Ni1^xii—Ge1—Er1^iii	73.00 (7)
Ge1^ii—Er1—Al1^ii	53.50 (7)	Ni1^xiii—Ge1—Er1^iii	73.00 (7)
Ge1^i—Er1—Al1^ii	108.77 (7)	Ni1^vii—Ge1—Er1^iii	128.41 (9)
Al1^i—Er1—Al1^ii	81.81 (10)	Al1—Ge1—Er1^iii	120.08 (10)
Ge2^i—Er1—Ni1^i	46.79 (5)	Ni1^xii—Ge1—Er2^xiv	144.86 (9)
Ge2^ii—Er1—Ni1^i	104.06 (5)	Ni1^xiii—Ge1—Er2^xiv	67.15 (7)
Ge1^iii—Er1—Ni1^i	46.41 (4)	Ni1^vii—Ge1—Er2^xiv	64.73 (5)
Ni1^iii—Er1—Ni1^i	112.35 (5)	Al1—Ge1—Er2^xiv	68.26 (7)
Ge1^ii—Er1—Ni1^i	151.88 (7)	Er1^iii—Ge1—Er2^xiv	135.15 (2)
Ge1^i—Er1—Ni1^i	88.57 (4)	Ni1^xii—Ge1—Er2^xv	67.15 (7)
Al1^i—Er1—Ni1^i	91.93 (6)	Ni1^xiii—Ge1—Er2^xv	144.86 (9)
Al1^ii—Er1—Ni1^i	151.90 (9)	Ni1^vii—Ge1—Er2^xv	64.73 (5)
Ge2^i—Er1—Ni1^ii	104.06 (5)	Al1—Ge1—Er2^xv	68.26 (7)
Ge2^ii—Er1—Ni1^ii	46.79 (5)	Er1^iii—Ge1—Er2^xv	135.15 (2)
Ge1^iii—Er1—Ni1^ii	46.41 (4)	Er2^xiv—Ge1—Er2^xv	89.66 (5)
Ni1^iii—Er1—Ni1^ii	112.35 (5)	Ni1^xii—Ge1—Er1^xvi	65.15 (6)
Ge1^ii—Er1—Ni1^ii	88.57 (4)	Ni1^xiii—Ge1—Er1^xvi	141.00 (9)
Ge1^i—Er1—Ni1^ii	151.88 (7)	Ni1^vii—Ge1—Er1^xvi	134.40 (3)
Al1^i—Er1—Ni1^ii	151.90 (9)	Al1—Ge1—Er1^xvi	67.03 (6)
Al1^ii—Er1—Ni1^ii	91.93 (6)	Er1^iii—Ge1—Er1^xvi	71.22 (4)
Ni1^i—Er1—Ni1^ii	80.77 (6)	Er2^xiv—Ge1—Er1^xvi	135.29 (7)
Ge2^i—Er1—Er1^iv	145.43 (5)	Er2^xv—Ge1—Er1^xvi	73.96 (3)
Ge2^ii—Er1—Er1^iv	87.47 (3)	Ni1^xii—Ge1—Er1^xvii	141.00 (9)
Ge1^iii—Er1—Er1^iv	55.04 (3)	Ni1^xiii—Ge1—Er1^xvii	65.15 (6)
Ni1^iii—Er1—Er1^iv	59.86 (4)	Ni1^vii—Ge1—Er1^xvii	134.40 (3)
Ge1^ii—Er1—Er1^iv	53.75 (3)	Al1—Ge1—Er1^xvii	67.03 (6)
Ge1^i—Er1—Er1^iv	104.88 (5)	Er1^iii—Ge1—Er1^xvii	71.22 (4)
Al1^i—Er1—Er1^iv	155.22 (8)	Er2^xiv—Ge1—Er1^xvii	73.96 (3)
Al1^ii—Er1—Er1^iv	96.57 (5)	Er2^xv—Ge1—Er1^xvii	135.29 (7)
Ni1^i—Er1—Er1^iv	100.15 (5)	Er1^xvi—Ge1—Er1^xvii	88.84 (5)
Ni1^ii—Er1—Er1^iv	52.49 (5)	Ni1^xii—Ge1—Er2^iii	59.65 (7)
Ge2^i—Er1—Er1^v	87.47 (3)	Ni1^xiii—Ge1—Er2^iii	59.65 (7)
Ge2^ii—Er1—Er1^v	145.43 (5)	Ni1^vii—Ge1—Er2^iii	60.05 (7)
Ge1^iii—Er1—Er1^v	55.04 (3)	Al1—Ge1—Er2^iii	171.56 (10)
Ni1^iii—Er1—Er1^v	59.86 (4)	Er1^iii—Ge1—Er2^iii	68.36 (4)
Ge1^ii—Er1—Er1^v	104.88 (5)	Er2^xiv—Ge1—Er2^iii	106.11 (5)
Ge1^i—Er1—Er1^v	53.75 (3)	Er2^xv—Ge1—Er2^iii	106.11 (5)
Al1^i—Er1—Er1^v	96.57 (5)	Er1^xvi—Ge1—Er2^iii	118.29 (4)
Al1^ii—Er1—Er1^v	155.22 (8)	Er1^xvii—Ge1—Er2^iii	118.29 (4)
Ni1^i—Er1—Er1^v	52.49 (5)	Ni1—Ge2—Al2	117.94 (13)
Ni1^ii—Er1—Er1^v	100.15 (5)	Ni1—Ge2—Al1	122.91 (12)
Er1^iv—Er1—Er1^v	74.58 (4)	Al2—Ge2—Al1	119.15 (15)
Ge2^i—Er1—Er3	53.83 (3)	Ni1—Ge2—Er2^xvi	66.64 (5)
Ge2^ii—Er1—Er3	53.83 (3)	Al2—Ge2—Er2^xvi	71.31 (7)
Ge1^iii—Er1—Er3	122.93 (5)	Al1—Ge2—Er2^xvi	134.14 (3)
Ni1^iii—Er1—Er3	142.28 (6)	Ni1—Ge2—Er2^xvii	66.64 (5)
Ge1^ii—Er1—Er3	111.10 (4)	Al2—Ge2—Er2^xvii	71.31 (7)
Ge1^i—Er1—Er3	111.10 (4)	Al1—Ge2—Er2^xvii	134.14 (3)
Al1^i—Er1—Er3	57.64 (7)	Er2^xvi—Ge2—Er2^xvii	91.66 (5)
Al1^ii—Er1—Er3	57.64 (7)	Ni1—Ge2—Er1^xvii	73.18 (6)
Ni1^i—Er1—Er3	95.91 (6)	Al2—Ge2—Er1^xvii	134.18 (3)
Ni1^ii—Er1—Er3	95.91 (6)	Al1—Ge2—Er1^xvii	67.90 (6)
Er1^iv—Er1—Er3	140.78 (2)	Er2^xvi—Ge2—Er1^xvii	139.72 (6)
Er1^v—Er1—Er3	140.78 (2)	Er2^xvii—Ge2—Er1^xvii	74.68 (2)
Ge2^i—Er1—Er2	52.59 (3)	Ni1—Ge2—Er1^xvi	73.18 (6)
Ge2^ii—Er1—Er2	52.59 (3)	Al2—Ge2—Er1^xvi	134.18 (3)
Ge1^iii—Er1—Er2	61.11 (4)	Al1—Ge2—Er1^xvi	67.90 (6)
Ni1^iii—Er1—Er2	155.90 (6)	Er2^xvi—Ge2—Er1^xvi	74.68 (2)
Ge1^ii—Er1—Er2	135.54 (3)	Er2^xvii—Ge2—Er1^xvi	139.72 (6)
Ge1^i—Er1—Er2	135.54 (3)	Er1^xvii—Ge2—Er1^xvi	91.43 (5)
Al1^i—Er1—Er2	102.57 (7)	Ni1—Ge2—Er3^v	135.06 (2)
Al1^ii—Er1—Er2	102.57 (7)	Al2—Ge2—Er3^v	69.36 (7)
Ni1^i—Er1—Er2	51.93 (4)	Al1—Ge2—Er3^v	68.61 (7)
Ni1^ii—Er1—Er2	51.93 (4)	Er2^xvi—Ge2—Er3^v	140.67 (6)
Er1^iv—Er1—Er2	101.91 (3)	Er2^xvii—Ge2—Er3^v	76.15 (3)
Er1^v—Er1—Er2	101.91 (3)	Er1^xvii—Ge2—Er3^v	73.40 (3)
Er3—Er1—Er2	61.82 (3)	Er1^xvi—Ge2—Er3^v	136.49 (6)
Ge2^i—Er1—Er2^vi	110.77 (4)	Ni1—Ge2—Er3^iv	135.06 (2)
Ge2^ii—Er1—Er2^vi	110.77 (4)	Al2—Ge2—Er3^iv	69.36 (7)
Ge1^iii—Er1—Er2^vi	148.84 (5)	Al1—Ge2—Er3^iv	68.61 (7)
Ni1^iii—Er1—Er2^vi	54.05 (6)	Er2^xvi—Ge2—Er3^iv	76.15 (3)
Ge1^ii—Er1—Er2^vi	52.74 (3)	Er2^xvii—Ge2—Er3^iv	140.67 (6)
Ge1^i—Er1—Er2^vi	52.74 (3)	Er1^xvii—Ge2—Er3^iv	136.49 (6)
Al1^i—Er1—Er2^vi	56.64 (6)	Er1^xvi—Ge2—Er3^iv	73.40 (3)
Al1^ii—Er1—Er2^vi	56.64 (6)	Er3^v—Ge2—Er3^iv	89.82 (5)
Ni1^i—Er1—Er2^vi	139.25 (3)	Ge1^xii—Ni1—Ge1^xiii	117.61 (14)
Ni1^ii—Er1—Er2^vi	139.25 (3)	Ge1^xii—Ni1—Ge2	116.12 (7)
Er1^iv—Er1—Er2^vi	101.82 (3)	Ge1^xiii—Ni1—Ge2	116.12 (7)
Er1^v—Er1—Er2^vi	101.82 (3)	Ge1^xii—Ni1—Ge1^vi	98.82 (9)
Er3—Er1—Er2^vi	88.23 (3)	Ge1^xiii—Ni1—Ge1^vi	98.82 (9)
Er2—Er1—Er2^vi	150.05 (4)	Ge2—Ni1—Ge1^vi	104.55 (11)
Ni2^vii—Er2—Ge2^ii	100.65 (6)	Ge1^xii—Ni1—Er1^iii	66.32 (7)
Ni2^vii—Er2—Ge2^i	100.65 (6)	Ge1^xiii—Ni1—Er1^iii	66.32 (7)
Ge2^ii—Er2—Ge2^i	91.66 (5)	Ge2—Ni1—Er1^iii	109.07 (10)
Ni2^vii—Er2—Ge1^viii	102.30 (6)	Ge1^vi—Ni1—Er1^iii	146.38 (12)
Ge2^ii—Er2—Ge1^viii	84.80 (3)	Ge1^xii—Ni1—Er2^xvii	161.21 (11)
Ge2^i—Er2—Ge1^viii	157.04 (6)	Ge1^xiii—Ni1—Er2^xvii	75.21 (5)
Ni2^vii—Er2—Ge1^ix	102.30 (6)	Ge2—Ni1—Er2^xvii	64.06 (6)
Ge2^ii—Er2—Ge1^ix	157.04 (6)	Ge1^vi—Ni1—Er2^xvii	64.32 (6)
Ge2^i—Er2—Ge1^ix	84.80 (3)	Er1^iii—Ni1—Er2^xvii	132.33 (5)
Ge1^viii—Er2—Ge1^ix	89.66 (5)	Ge1^xii—Ni1—Er2^xvi	75.21 (5)
Ni2^vii—Er2—Ni1^ii	135.33 (4)	Ge1^xiii—Ni1—Er2^xvi	161.21 (11)
Ge2^ii—Er2—Ni1^ii	49.29 (6)	Ge2—Ni1—Er2^xvi	64.06 (6)
Ge2^i—Er2—Ni1^ii	110.84 (6)	Ge1^vi—Ni1—Er2^xvi	64.32 (6)
Ge1^viii—Er2—Ni1^ii	50.95 (6)	Er1^iii—Ni1—Er2^xvi	132.33 (5)
Ge1^ix—Er2—Ni1^ii	111.14 (6)	Er2^xvii—Ni1—Er2^xvi	89.27 (7)
Ni2^vii—Er2—Ni1^i	135.33 (4)	Ge1^xii—Ni1—Er2^xviii	64.69 (7)
Ge2^ii—Er2—Ni1^i	110.84 (6)	Ge1^xiii—Ni1—Er2^xviii	64.69 (7)
Ge2^i—Er2—Ni1^i	49.29 (6)	Ge2—Ni1—Er2^xviii	177.41 (11)
Ge1^viii—Er2—Ni1^i	111.14 (6)	Ge1^vi—Ni1—Er2^xviii	72.86 (8)
Ge1^ix—Er2—Ni1^i	50.95 (6)	Er1^iii—Ni1—Er2^xviii	73.52 (7)
Ni1^ii—Er2—Ni1^i	89.27 (7)	Er2^xvii—Ni1—Er2^xviii	114.30 (7)
Ni2^vii—Er2—Ni1^x	127.34 (9)	Er2^xvi—Ni1—Er2^xviii	114.30 (7)
Ge2^ii—Er2—Ni1^x	114.96 (5)	Ge1^xii—Ni1—Er1^xvii	128.12 (10)
Ge2^i—Er2—Ni1^x	114.96 (5)	Ge1^xiii—Ni1—Er1^xvii	60.59 (5)
Ge1^viii—Er2—Ni1^x	48.16 (3)	Ge2—Ni1—Er1^xvii	60.03 (6)
Ge1^ix—Er2—Ni1^x	48.16 (3)	Ge1^vi—Ni1—Er1^xvii	133.01 (6)
Ni1^ii—Er2—Ni1^x	65.70 (7)	Er1^iii—Ni1—Er1^xvii	67.65 (5)
Ni1^i—Er2—Ni1^x	65.70 (7)	Er2^xvii—Ni1—Er1^xvii	69.45 (4)
Ni2^vii—Er2—Al1^ix	50.09 (7)	Er2^xvi—Ni1—Er1^xvii	124.02 (9)
Ge2^ii—Er2—Al1^ix	149.26 (7)	Er2^xviii—Ni1—Er1^xvii	121.67 (7)
Ge2^i—Er2—Al1^ix	86.06 (6)	Ge1^xii—Ni1—Er1^xvi	60.59 (5)
Ge1^viii—Er2—Al1^ix	108.30 (7)	Ge1^xiii—Ni1—Er1^xvi	128.12 (10)
Ge1^ix—Er2—Al1^ix	53.26 (7)	Ge2—Ni1—Er1^xvi	60.03 (6)
Ni1^ii—Er2—Al1^ix	157.09 (9)	Ge1^vi—Ni1—Er1^xvi	133.01 (6)
Ni1^i—Er2—Al1^ix	90.68 (6)	Er1^iii—Ni1—Er1^xvi	67.65 (5)
Ni1^x—Er2—Al1^ix	93.53 (8)	Er2^xvii—Ni1—Er1^xvi	124.02 (9)
Ni2^vii—Er2—Al1^viii	50.09 (7)	Er2^xvi—Ni1—Er1^xvi	69.45 (4)
Ge2^ii—Er2—Al1^viii	86.06 (6)	Er2^xviii—Ni1—Er1^xvi	121.67 (7)
Ge2^i—Er2—Al1^viii	149.26 (7)	Er1^xvii—Ni1—Er1^xvi	80.77 (6)
Ge1^viii—Er2—Al1^viii	53.26 (7)	Al1^v—Ni2—Al1^ii	146.8 (2)
Ge1^ix—Er2—Al1^viii	108.30 (7)	Al1^v—Ni2—Al1^i	63.47 (15)
Ni1^ii—Er2—Al1^viii	90.68 (6)	Al1^ii—Ni2—Al1^i	106.47 (16)
Ni1^i—Er2—Al1^viii	157.09 (9)	Al1^v—Ni2—Al1^iv	106.47 (16)
Ni1^x—Er2—Al1^viii	93.53 (8)	Al1^ii—Ni2—Al1^iv	63.47 (15)
Al1^ix—Er2—Al1^viii	80.63 (9)	Al1^i—Ni2—Al1^iv	146.8 (2)
Ni2^vii—Er2—Al2^v	50.40 (8)	Al1^v—Ni2—Al2^xix	143.94 (12)
Ge2^ii—Er2—Al2^v	106.78 (8)	Al1^ii—Ni2—Al2^xix	62.69 (12)
Ge2^i—Er2—Al2^v	50.99 (9)	Al1^i—Ni2—Al2^xix	143.94 (12)
Ge1^viii—Er2—Al2^v	151.31 (10)	Al1^iv—Ni2—Al2^xix	62.69 (12)
Ge1^ix—Er2—Al2^v	88.55 (6)	Al1^v—Ni2—Al2^xx	62.69 (12)
Ni1^ii—Er2—Al2^v	153.16 (11)	Al1^ii—Ni2—Al2^xx	143.94 (12)
Ni1^i—Er2—Al2^v	89.59 (6)	Al1^i—Ni2—Al2^xx	62.69 (12)
Ni1^x—Er2—Al2^v	136.69 (6)	Al1^iv—Ni2—Al2^xx	143.94 (12)
Al1^ix—Er2—Al2^v	49.74 (12)	Al2^xix—Ni2—Al2^xx	104.5 (2)
Al1^viii—Er2—Al2^v	100.48 (9)	Al1^v—Ni2—Er3	73.40 (12)
Ni2^vii—Er2—Al2^iv	50.40 (8)	Al1^ii—Ni2—Er3	73.40 (12)
Ge2^ii—Er2—Al2^iv	50.99 (9)	Al1^i—Ni2—Er3	73.40 (12)
Ge2^i—Er2—Al2^iv	106.78 (8)	Al1^iv—Ni2—Er3	73.40 (12)
Ge1^viii—Er2—Al2^iv	88.55 (6)	Al2^xix—Ni2—Er3	127.73 (12)
Ge1^ix—Er2—Al2^iv	151.31 (10)	Al2^xx—Ni2—Er3	127.73 (12)
Ni1^ii—Er2—Al2^iv	89.59 (6)	Al1^v—Ni2—Er2^vi	126.75 (8)
Ni1^i—Er2—Al2^iv	153.16 (11)	Al1^ii—Ni2—Er2^vi	71.76 (8)
Ni1^x—Er2—Al2^iv	136.69 (6)	Al1^i—Ni2—Er2^vi	71.76 (8)
Al1^ix—Er2—Al2^iv	100.48 (9)	Al1^iv—Ni2—Er2^vi	126.75 (8)
Al1^viii—Er2—Al2^iv	49.74 (12)	Al2^xix—Ni2—Er2^vi	72.20 (7)
Al2^v—Er2—Al2^iv	79.59 (2)	Al2^xx—Ni2—Er2^vi	72.20 (7)
Ni2^vii—Er2—Ge1^iii	174.44 (8)	Er3—Ni2—Er2^vi	119.97 (7)
Ge2^ii—Er2—Ge1^iii	83.17 (4)	Al1^v—Ni2—Er2^xxi	71.76 (8)
Ge2^i—Er2—Ge1^iii	83.17 (4)	Al1^ii—Ni2—Er2^xxi	126.75 (8)
Ge1^viii—Er2—Ge1^iii	73.88 (5)	Al1^i—Ni2—Er2^xxi	126.75 (8)
Ge1^ix—Er2—Ge1^iii	73.89 (5)	Al1^iv—Ni2—Er2^xxi	71.76 (8)
Ni1^ii—Er2—Ge1^iii	45.14 (4)	Al2^xix—Ni2—Er2^xxi	72.20 (7)
Ni1^i—Er2—Ge1^iii	45.14 (4)	Al2^xx—Ni2—Er2^xxi	72.20 (7)
Ni1^x—Er2—Ge1^iii	47.09 (6)	Er3—Ni2—Er2^xxi	119.97 (7)
Al1^ix—Er2—Ge1^iii	126.77 (7)	Er2^vi—Ni2—Er2^xxi	120.06 (13)
Al1^viii—Er2—Ge1^iii	126.77 (7)	Ni2^v—Al1—Ni2^iv	106.47 (16)
Al2^v—Er2—Ge1^iii	132.53 (6)	Ni2^v—Al1—Al2^vii	59.26 (11)
Al2^iv—Er2—Ge1^iii	132.53 (7)	Ni2^iv—Al1—Al2^vii	59.26 (11)
Ni2^vii—Er2—Er1	135.03 (7)	Ni2^v—Al1—Al1^iii	58.26 (8)
Ge2^ii—Er2—Er1	52.73 (3)	Ni2^iv—Al1—Al1^iii	58.26 (8)
Ge2^i—Er2—Er1	52.73 (3)	Al2^vii—Al1—Al1^iii	59.84 (10)
Ge1^viii—Er2—Er1	109.11 (4)	Ni2^v—Al1—Ge1	115.29 (10)
Ge1^ix—Er2—Er1	109.11 (4)	Ni2^iv—Al1—Ge1	115.29 (10)
Ni1^ii—Er2—Er1	58.62 (5)	Al2^vii—Al1—Ge1	104.19 (15)
Ni1^i—Er2—Er1	58.62 (5)	Al1^iii—Al1—Ge1	164.03 (9)
Ni1^x—Er2—Er1	97.62 (6)	Ni2^v—Al1—Ge2	113.28 (13)
Al1^ix—Er2—Er1	138.17 (5)	Ni2^iv—Al1—Ge2	113.28 (13)
Al1^viii—Er2—Er1	138.17 (5)	Al2^vii—Al1—Ge2	162.66 (18)
Al2^v—Er2—Er1	98.50 (10)	Al1^iii—Al1—Ge2	102.81 (9)
Al2^iv—Er2—Er1	98.50 (10)	Ge1—Al1—Ge2	93.15 (14)
Ge1^iii—Er2—Er1	50.53 (3)	Ni2^v—Al1—Er1^xvi	167.47 (13)
Ni2^vii—Er2—Er1^vii	74.92 (7)	Ni2^iv—Al1—Er1^xvi	85.82 (4)
Ge2^ii—Er2—Er1^vii	134.17 (3)	Al2^vii—Al1—Er1^xvi	131.84 (9)
Ge2^i—Er2—Er1^vii	134.17 (3)	Al1^iii—Al1—Er1^xvi	129.97 (6)
Ge1^viii—Er2—Er1^vii	53.29 (3)	Ge1—Al1—Er1^xvi	59.47 (7)
Ge1^ix—Er2—Er1^vii	53.29 (3)	Ge2—Al1—Er1^xvi	57.94 (7)
Ni1^ii—Er2—Er1^vii	102.07 (6)	Ni2^v—Al1—Er1^xvii	85.82 (4)
Ni1^i—Er2—Er1^vii	102.07 (6)	Ni2^iv—Al1—Er1^xvii	167.47 (13)
Ni1^x—Er2—Er1^vii	52.43 (5)	Al2^vii—Al1—Er1^xvii	131.84 (9)
Al1^ix—Er2—Er1^vii	55.61 (7)	Al1^iii—Al1—Er1^xvii	129.97 (6)
Al1^viii—Er2—Er1^vii	55.61 (6)	Ge1—Al1—Er1^xvii	59.47 (7)
Al2^v—Er2—Er1^vii	104.38 (10)	Ge2—Al1—Er1^xvii	57.94 (7)
Al2^iv—Er2—Er1^vii	104.38 (10)	Er1^xvi—Al1—Er1^xvii	81.81 (10)
Ge1^iii—Er2—Er1^vii	99.52 (4)	Ni2^v—Al1—Er2^xiv	58.15 (7)
Er1—Er2—Er1^vii	150.05 (4)	Ni2^iv—Al1—Er2^xiv	120.59 (16)
Ni2^vii—Er2—Er3	76.27 (7)	Al2^vii—Al1—Er2^xiv	65.80 (9)
Ge2^ii—Er2—Er3	52.50 (3)	Al1^iii—Al1—Er2^xiv	110.48 (7)
Ge2^i—Er2—Er3	52.50 (3)	Ge1—Al1—Er2^xiv	58.48 (7)
Ge1^viii—Er2—Er3	135.05 (2)	Ge2—Al1—Er2^xiv	125.66 (10)
Ge1^ix—Er2—Er3	135.05 (2)	Er1^xvi—Al1—Er2^xiv	117.95 (12)
Ni1^ii—Er2—Er3	98.31 (6)	Er1^xvii—Al1—Er2^xiv	67.75 (5)
Ni1^i—Er2—Er3	98.31 (6)	Ni2^v—Al1—Er2^xv	120.59 (16)
Ni1^x—Er2—Er3	156.38 (6)	Ni2^iv—Al1—Er2^xv	58.15 (7)
Al1^ix—Er2—Er3	104.36 (7)	Al2^vii—Al1—Er2^xv	65.80 (9)
Al1^viii—Er2—Er3	104.36 (7)	Al1^iii—Al1—Er2^xv	110.48 (7)
Al2^v—Er2—Er3	55.39 (9)	Ge1—Al1—Er2^xv	58.48 (7)
Al2^iv—Er2—Er3	55.39 (9)	Ge2—Al1—Er2^xv	125.66 (10)
Ge1^iii—Er2—Er3	109.29 (4)	Er1^xvi—Al1—Er2^xv	67.75 (5)
Er1—Er2—Er3	58.76 (2)	Er1^xvii—Al1—Er2^xv	117.95 (12)
Er1^vii—Er2—Er3	151.19 (3)	Er2^xiv—Al1—Er2^xv	80.63 (9)
Ni2—Er3—Ge2^v	102.77 (4)	Ni2^v—Al1—Er3^iv	118.40 (14)
Ni2—Er3—Ge2^ii	102.77 (4)	Ni2^iv—Al1—Er3^iv	56.20 (9)
Ge2^v—Er3—Ge2^ii	154.46 (7)	Al2^vii—Al1—Er3^iv	109.80 (11)
Ni2—Er3—Ge2^i	102.77 (4)	Al1^iii—Al1—Er3^iv	64.98 (7)
Ge2^v—Er3—Ge2^i	84.57 (5)	Ge1—Al1—Er3^iv	125.59 (10)
Ge2^ii—Er3—Ge2^i	89.82 (5)	Ge2—Al1—Er3^iv	58.14 (7)
Ni2—Er3—Ge2^iv	102.77 (4)	Er1^xvi—Al1—Er3^iv	66.17 (5)
Ge2^v—Er3—Ge2^iv	89.82 (5)	Er1^xvii—Al1—Er3^iv	116.07 (12)
Ge2^ii—Er3—Ge2^iv	84.57 (5)	Er2^xiv—Al1—Er3^iv	175.23 (14)
Ge2^i—Er3—Ge2^iv	154.46 (7)	Er2^xv—Al1—Er3^iv	99.390 (19)
Ni2—Er3—Al2^v	139.48 (7)	Ni2^v—Al1—Er3^v	56.20 (9)
Ge2^v—Er3—Al2^v	51.19 (5)	Ni2^iv—Al1—Er3^v	118.40 (14)
Ge2^ii—Er3—Al2^v	106.90 (6)	Al2^vii—Al1—Er3^v	109.80 (11)
Ge2^i—Er3—Al2^v	51.19 (5)	Al1^iii—Al1—Er3^v	64.98 (7)
Ge2^iv—Er3—Al2^v	106.90 (6)	Ge1—Al1—Er3^v	125.59 (10)
Ni2—Er3—Al2^iv	139.48 (7)	Ge2—Al1—Er3^v	58.14 (7)
Ge2^v—Er3—Al2^iv	106.90 (6)	Er1^xvi—Al1—Er3^v	116.07 (12)
Ge2^ii—Er3—Al2^iv	51.19 (5)	Er1^xvii—Al1—Er3^v	66.17 (5)
Ge2^i—Er3—Al2^iv	106.90 (6)	Er2^xiv—Al1—Er3^v	99.390 (19)
Ge2^iv—Er3—Al2^iv	51.19 (5)	Er2^xv—Al1—Er3^v	175.23 (14)
Al2^v—Er3—Al2^iv	81.04 (14)	Er3^iv—Al1—Er3^v	80.19 (9)
Ni2—Er3—Al1^ii	50.40 (6)	Ni2^xix—Al2—Ni2^xx	104.5 (2)
Ge2^v—Er3—Al1^ii	151.66 (9)	Ni2^xix—Al2—Ge2^iii	114.15 (4)
Ge2^ii—Er3—Al1^ii	53.25 (7)	Ni2^xx—Al2—Ge2^iii	114.15 (4)
Ge2^i—Er3—Al1^ii	108.12 (6)	Ni2^xix—Al2—Ge2	114.15 (4)
Ge2^iv—Er3—Al1^ii	88.32 (5)	Ni2^xx—Al2—Ge2	114.15 (4)
Al2^v—Er3—Al1^ii	154.56 (7)	Ge2^iii—Al2—Ge2	96.1 (2)
Al2^iv—Er3—Al1^ii	93.79 (8)	Ni2^xix—Al2—Al1^vi	58.05 (12)
Ni2—Er3—Al1^iv	50.40 (6)	Ni2^xx—Al2—Al1^vi	58.05 (12)
Ge2^v—Er3—Al1^iv	108.12 (6)	Ge2^iii—Al2—Al1^vi	162.12 (19)
Ge2^ii—Er3—Al1^iv	88.32 (5)	Ge2—Al2—Al1^vi	101.81 (9)
Ge2^i—Er3—Al1^iv	151.66 (8)	Ni2^xix—Al2—Al1^xviii	58.05 (12)
Ge2^iv—Er3—Al1^iv	53.25 (7)	Ni2^xx—Al2—Al1^xviii	58.05 (12)
Al2^v—Er3—Al1^iv	154.56 (7)	Ge2^iii—Al2—Al1^xviii	101.81 (9)
Al2^iv—Er3—Al1^iv	93.79 (8)	Ge2—Al2—Al1^xviii	162.12 (19)
Al1^ii—Er3—Al1^iv	50.04 (14)	Al1^vi—Al2—Al1^xviii	60.3 (2)
Ni2—Er3—Al1^i	50.40 (6)	Ni2^xix—Al2—Er3^v	168.25 (18)
Ge2^v—Er3—Al1^i	88.32 (5)	Ni2^xx—Al2—Er3^v	87.21 (7)
Ge2^ii—Er3—Al1^i	108.12 (6)	Ge2^iii—Al2—Er3^v	59.45 (10)
Ge2^i—Er3—Al1^i	53.25 (7)	Ge2—Al2—Er3^v	59.45 (10)
Ge2^iv—Er3—Al1^i	151.66 (8)	Al1^vi—Al2—Er3^v	131.09 (5)
Al2^v—Er3—Al1^i	93.79 (8)	Al1^xviii—Al2—Er3^v	131.09 (5)
Al2^iv—Er3—Al1^i	154.56 (7)	Ni2^xix—Al2—Er3^iv	87.21 (7)
Al1^ii—Er3—Al1^i	80.19 (9)	Ni2^xx—Al2—Er3^iv	168.25 (18)
Al1^iv—Er3—Al1^i	100.79 (13)	Ge2^iii—Al2—Er3^iv	59.45 (10)
Ni2—Er3—Al1^v	50.40 (6)	Ge2—Al2—Er3^iv	59.45 (10)
Ge2^v—Er3—Al1^v	53.25 (7)	Al1^vi—Al2—Er3^iv	131.09 (5)
Ge2^ii—Er3—Al1^v	151.66 (8)	Al1^xviii—Al2—Er3^iv	131.09 (5)
Ge2^i—Er3—Al1^v	88.32 (5)	Er3^v—Al2—Er3^iv	81.04 (14)
Ge2^iv—Er3—Al1^v	108.12 (6)	Ni2^xix—Al2—Er2^v	118.27 (13)
Al2^v—Er3—Al1^v	93.79 (8)	Ni2^xx—Al2—Er2^v	57.40 (4)
Al2^iv—Er3—Al1^v	154.56 (7)	Ge2^iii—Al2—Er2^v	57.70 (3)
Al1^ii—Er3—Al1^v	100.79 (13)	Ge2—Al2—Er2^v	127.27 (14)
Al1^iv—Er3—Al1^v	80.19 (9)	Al1^vi—Al2—Er2^v	109.82 (16)
Al1^i—Er3—Al1^v	50.04 (14)	Al1^xviii—Al2—Er2^v	64.47 (8)
Ni2—Er3—Er1	76.88 (2)	Er3^v—Al2—Er2^v	67.95 (5)
Ge2^v—Er3—Er1	134.86 (2)	Er3^iv—Al2—Er2^v	117.15 (12)
Ge2^ii—Er3—Er1	52.76 (3)	Ni2^xix—Al2—Er2^xvi	57.40 (4)
Ge2^i—Er3—Er1	52.76 (3)	Ni2^xx—Al2—Er2^xvi	118.27 (13)
Ge2^iv—Er3—Er1	134.86 (2)	Ge2^iii—Al2—Er2^xvi	127.27 (14)
Al2^v—Er3—Er1	99.933 (18)	Ge2—Al2—Er2^xvi	57.70 (3)
Al2^iv—Er3—Er1	99.933 (19)	Al1^vi—Al2—Er2^xvi	64.46 (8)
Al1^ii—Er3—Er1	56.18 (6)	Al1^xviii—Al2—Er2^xvi	109.82 (16)
Al1^iv—Er3—Er1	105.50 (8)	Er3^v—Al2—Er2^xvi	117.15 (12)
Al1^i—Er3—Er1	56.18 (6)	Er3^iv—Al2—Er2^xvi	67.95 (5)
Al1^v—Er3—Er1	105.50 (8)	Er2^v—Al2—Er2^xvi	173.9 (2)
Ni2—Er3—Er1^xi	76.88 (2)	Ni2^xix—Al2—Er2^iv	57.40 (4)
Ge2^v—Er3—Er1^xi	52.76 (3)	Ni2^xx—Al2—Er2^iv	118.27 (13)
Ge2^ii—Er3—Er1^xi	134.86 (2)	Ge2^iii—Al2—Er2^iv	57.70 (3)
Ge2^i—Er3—Er1^xi	134.86 (2)	Ge2—Al2—Er2^iv	127.27 (14)
Ge2^iv—Er3—Er1^xi	52.76 (3)	Al1^vi—Al2—Er2^iv	109.82 (16)
Al2^v—Er3—Er1^xi	99.933 (19)	Al1^xviii—Al2—Er2^iv	64.47 (8)
Al2^iv—Er3—Er1^xi	99.933 (19)	Er3^v—Al2—Er2^iv	117.15 (12)
Al1^ii—Er3—Er1^xi	105.50 (8)	Er3^iv—Al2—Er2^iv	67.95 (5)
Al1^iv—Er3—Er1^xi	56.18 (6)	Er2^v—Al2—Er2^iv	79.59 (2)
Al1^i—Er3—Er1^xi	105.50 (8)	Er2^xvi—Al2—Er2^iv	100.08 (3)
Al1^v—Er3—Er1^xi	56.18 (6)	Ni2^xix—Al2—Er2^xvii	118.27 (13)
Er1—Er3—Er1^xi	153.77 (4)	Ni2^xx—Al2—Er2^xvii	57.40 (4)
Ni2—Er3—Er2^xi	136.301 (18)	Ge2^iii—Al2—Er2^xvii	127.27 (14)
Ge2^v—Er3—Er2^xi	51.34 (3)	Ge2—Al2—Er2^xvii	57.70 (3)
Ge2^ii—Er3—Er2^xi	107.76 (4)	Al1^vi—Al2—Er2^xvii	64.47 (8)
Ge2^i—Er3—Er2^xi	107.76 (4)	Al1^xviii—Al2—Er2^xvii	109.82 (16)
Ge2^iv—Er3—Er2^xi	51.34 (3)	Er3^v—Al2—Er2^xvii	67.95 (5)
Al2^v—Er3—Er2^xi	56.66 (4)	Er3^iv—Al2—Er2^xvii	117.15 (12)
Al2^iv—Er3—Er2^xi	56.66 (4)	Er2^v—Al2—Er2^xvii	100.08 (3)
Al1^ii—Er3—Er2^xi	138.85 (5)	Er2^xvi—Al2—Er2^xvii	79.59 (2)
Al1^iv—Er3—Er2^xi	99.71 (7)	Er2^iv—Al2—Er2^xvii	173.9 (2)

Symmetry codes: (i) x+1/2, y+1/2, −z+1; (ii) x−1/2, y+1/2, −z+1; (iii) −x+1/2, −y+1/2, z; (iv) −x, −y+1, −z+1; (v) −x+1, −y+1, −z+1; (vi) x, y, z−1; (vii) x, y, z+1; (viii) x−1/2, y+1/2, −z+2; (ix) x+1/2, y+1/2, −z+2; (x) −x+1/2, −y+1/2, z+1; (xi) −x+1/2, −y+3/2, z; (xii) −x, −y, −z+1; (xiii) −x+1, −y, −z+1; (xiv) x+1/2, y−1/2, −z+2; (xv) x−1/2, y−1/2, −z+2; (xvi) x−1/2, y−1/2, −z+1; (xvii) x+1/2, y−1/2, −z+1; (xviii) −x+1/2, −y+1/2, z−1; (xix) −x, −y+1, −z; (xx) −x+1, −y+1, −z; (xxi) −x+1/2, −y+3/2, z−1.