Didysprosium hepta­nickel

Levytskyy, V.; Babizhetskyy, V.; Kotur, B.; Smetana, V.

doi:10.1107/S1600536812007611

inorganic compounds

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ISSN: 2056-9890

Volume 68| Part 3| March 2012| Page i20

doi:10.1107/S1600536812007611

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Didysprosium heptanickel

Volodymyr Levytskyy,^a ^* Volodymyr Babizhetskyy,^a Bohdan Kotur ^a and Volodymyr Smetana ^b

^aDepartment of Inorganic Chemistry, Ivan Franko National University of Lviv, Kyryla & Mefodiya street 6, 79005 Lviv, Ukraine, and ^b344 Spedding Hall, Ames Laboratory, Ames, IA 50011-3020, USA
^*Correspondence e-mail: v.levyckyy@gmail.com

(Received 13 February 2012; accepted 20 February 2012; online 24 February 2012)

The title compound, Dy₂Ni₇, adopts the β-Gd₂Co₇-type structure type. The asymmetric unit contains two Dy sites (both site symmetry 3m) and five Ni sites (site symmetries .m, .2/m and -3m, and two 3m). The four different Ni coordination polyhedra are Frank–Kasper icosahedra formed by five Dy and seven Ni atoms, four Dy and eight Ni, three Dy and nine Ni, and six Dy and six Ni atoms, respectively. The two different Dy coordination polyhedra are either pseudo Frank–Kasper icosahedra formed by two Dy and 18 Ni atoms or normal Frank–Kasper icosahedra formed by four Dy and 12 Ni atoms.

Related literature

For the β-Gd₂Co₇ structure type, see: Bertaut et al. (1965 ). For previous powder diffraction studies of the title compound, see: Lemaire et al. (1967 ); Lemaire & Paccard (1969 ). For related compounds, see: Buschow & van der Goot (1970 ). For intergrowth structures, see: Parthé et al. (1985 ); Grin (1992 ).

Experimental

Crystal data

Dy₂Ni₇
M_r = 735.97
Trigonal, $[R \overline 3m ]$
a = 4.9460 (9) Å
c = 36.191 (9) Å
V = 766.7 (3) Å³
Z = 6
Mo Kα radiation
μ = 53.83 mm⁻¹
T = 293 K
0.14 × 0.09 × 0.06 mm

Data collection

Stoe IPDS II diffractometer
Absorption correction: numerical (X-RED; Stoe & Cie, 2009 ) T_min = 0.067, T_max = 0.135
372 measured reflections
253 independent reflections
208 reflections with I > 2σ(I)
R_int = 0.027

Refinement

R[F² > 2σ(F²)] = 0.047
wR(F²) = 0.115
S = 1.07
253 reflections
25 parameters
Δρ_max = 5.07 e Å⁻³
Δρ_min = −2.37 e Å⁻³

Data collection: X-AREA (Stoe & Cie, 2009); cell refinement: X-AREA; data reduction: X-AREA; program(s) used to solve structure: SIR2011 (Burla et al., 2012 ); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ) and WinGX (Farrugia, 1999 ); molecular graphics: DIAMOND (Brandenburg, 2006 ); software used to prepare material for publication: publCIF (Westrip, 2010 ).

Supporting information

Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536812007611/vn2032sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536812007611/vn2032Isup2.hkl

checkCIF report

Comment top

The existence of the Dy₂Ni₇ structure isotypic with the rhombohedral β-Gd₂Co₇ structure was reported by Lemaire et al. (1967) and Lemaire & Paccard (1969). The lattice parameters were determined from X-ray powder diffraction data without specifying atomic coordinates. Buschow & van der Goot (1970) prepared a series of isotypic compounds with a composition close to R₂Ni₇ (R = Y, La–Nd, Sm, Gd–Er) and from the X-ray powder diffraction data confirmed the lattice parameters for Dy₂Ni₇.

In this work we carried out a single-crystal investigation of the Dy₂Ni₇ inter-metallic compound. A view of the crystal structure of Dy₂Ni₇ is shown in Fig. 1. The structure belongs to the β-Gd₂Co₇ structure type (Bertaut et al., 1965) and consists of stacks of RX₅ blocks corresponding to the CaCu₅-type structure and R₂X₄ blocks corresponding to the MgCu₂-type structure. The presence of the same Kagome net in the structure types of CaCu₅ and the Laves phase MgCu₂ allows a combination of both structural motifs along the 3-fold inversion axis giving an inter-growth structure: 2RX₅ + R₂X₄ = 2R₂X₇. The Kagome net serves as the common interface in the structure (Parthé et al., 1985; Grin, 1992).

In Fig. 2 the ab projection of the unit cell and the coordination polyhedra for all atom types are shown. The coordination number for all Ni atoms is 12, but the Wyckoff site occupation is different. The coordination polyhedra are Frank–Kasper icosahedra (coordination number 12). The Ni1 atom (Wyckoff site 18h, site symmetry .m) is surrounded by 5 Dy atoms and 7 Ni atoms. The Ni2 atom (Wyckoff site 9e, site symmetry .2/m) is surrounded by 4 Dy atoms and 8 Ni atoms. The Ni3 and Ni4 atoms (both Wyckoff site 6c, site symmetry 3m) are surrounded by 3 Dy and 9 Ni atoms and by 3 Dy atoms and 9 Ni atoms respectively. The Ni5 atom (Wyckoff site 3b, site symmetry 3m) is surrounded by 6 Dy atoms and 6 Ni atoms. The coordination polyhedra for Dy1 and Dy2 atoms (both in Wyckoff site 6c, site symmetry 3m) are pseudo Frank–Kasper polyhedra (coordination number 20) and Frank–Kasper polyhedra (coordination number 16), respectively. The Dy1 atom is surrounded by 2 Dy atoms and 18 Ni atoms. The Dy2 atom is surrounded by 4 Dy atoms and 12 Ni atoms.

Related literature top

For the β-Gd₂Co₇ structure type, see: Bertaut et al. (1965). For previous powder diffraction studies of the title compound, see: Lemaire et al. (1967); Lemaire & Paccard (1969). For related compounds, see: Buschow & van der Goot (1970). For intergrowth structures, see: Parthé et al. (1985); Grin (1992).

Experimental top

The sample was prepared from the commercially available pure elements: sublimed bulk pieces of dysprosium metal with a claimed purity of 99.99 at.% (Alfa Aesar, Johnson Matthey) and electrolytic nickel (99.99% pure) piece (Aldrich). A mixture of the powders was compacted in stainless steel dies. The pellet was arc-melted under an argon atmosphere on a water-cooled copper hearth. The alloy button (~1 g) was turned over and remelted three times to improve homogeneity. Subsequently, the sample was annealed in evacuated silica tube under an argon atmosphere for four weeks at 1070 K. Shiny metallic gray plate-like single crystals were isolated mechanically by crushing the sample.

Computing details top

Data collection: X-AREA (Stoe & Cie, 2009); cell refinement: X-AREA (Stoe & Cie, 2009); data reduction: X-AREA (Stoe & Cie, 2009); program(s) used to solve structure: SIR2011 (Burla et al., 2012); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008) and WinGX (Farrugia, 1999); molecular graphics: DIAMOND (Brandenburg, 2006); software used to prepare material for publication: publCIF (Westrip, 2010).

Figures top

	Fig. 1. Perspective view of the crystal structure of Dy₂Ni₇. The unit cell and the blocks of RX₅ and R₂X₄ are emphasized. Atoms are represented by their anisotropic displacement ellipsoids at the 99% probability level
	Fig. 2. The ab projection of the unit cell and coordination polyhedra for all types of atoms in the Dy₂Ni₇ structure

Didysprosium heptanickel top

Crystal data top

Dy₂Ni₇	D_x = 9.564 Mg m⁻³
M_r = 735.97	Mo Kα radiation, λ = 0.71073 Å
Trigonal, R3m	Cell parameters from 1802 reflections
Hall symbol: -R 3 2"	θ = 1.6–27.2°
a = 4.9460 (9) Å	µ = 53.83 mm⁻¹
c = 36.191 (9) Å	T = 293 K
V = 766.7 (3) Å³	Plate-like, grey
Z = 6	0.14 × 0.09 × 0.06 mm
F(000) = 1968

Data collection top

Stoe IPDS II diffractometer	253 independent reflections
Radiation source: fine-focus sealed tube	208 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.027
ω scans	θ_max = 26.7°, θ_min = 1.7°
Absorption correction: numerical (X-RED; Stoe & Cie, 2009)	h = −6→3
T_min = 0.067, T_max = 0.135	k = 0→6
372 measured reflections	l = 0→45

Refinement top

Refinement on F²	0 restraints
Least-squares matrix: full	Primary atom site location: structure-invariant direct methods
R[F² > 2σ(F²)] = 0.047	Secondary atom site location: difference Fourier map
wR(F²) = 0.115	w = 1/[σ²(F_o²) + (0.075P)²] where P = (F_o² + 2F_c²)/3
S = 1.07	(Δ/σ)_max < 0.001
253 reflections	Δρ_max = 5.07 e Å⁻³
25 parameters	Δρ_min = −2.37 e Å⁻³

Crystal data top

Dy₂Ni₇	Z = 6
M_r = 735.97	Mo Kα radiation
Trigonal, R3m	µ = 53.83 mm⁻¹
a = 4.9460 (9) Å	T = 293 K
c = 36.191 (9) Å	0.14 × 0.09 × 0.06 mm
V = 766.7 (3) Å³

Data collection top

Stoe IPDS II diffractometer	253 independent reflections
Absorption correction: numerical (X-RED; Stoe & Cie, 2009)	208 reflections with I > 2σ(I)
T_min = 0.067, T_max = 0.135	R_int = 0.027
372 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.047	25 parameters
wR(F²) = 0.115	0 restraints
S = 1.07	Δρ_max = 5.07 e Å⁻³
253 reflections	Δρ_min = −2.37 e Å⁻³

Special details top

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 (Å²) top

	x	y	z	U_iso*/U_eq
Dy1	0.0000	0.0000	0.05083 (5)	0.0143 (5)
Dy2	0.0000	0.0000	0.14764 (5)	0.0152 (5)
Ni1	0.5005 (3)	0.4995 (3)	0.10972 (7)	0.0124 (7)
Ni2	0.5000	0.0000	0.0000	0.0096 (8)
Ni3	0.0000	0.0000	0.27796 (13)	0.0158 (11)
Ni4	0.0000	0.0000	0.38831 (12)	0.0133 (10)
Ni5	0.0000	0.0000	0.5000	0.0097 (13)

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Dy1	0.0103 (6)	0.0103 (6)	0.0222 (9)	0.0052 (3)	0.000	0.000
Dy2	0.0129 (7)	0.0129 (7)	0.0199 (9)	0.0065 (3)	0.000	0.000
Ni1	0.0128 (10)	0.0128 (10)	0.0137 (11)	0.0080 (11)	0.0007 (5)	−0.0007 (5)
Ni2	0.0102 (12)	0.0080 (18)	0.0099 (14)	0.0040 (9)	0.0001 (6)	0.0003 (12)
Ni3	0.0167 (16)	0.0167 (16)	0.014 (2)	0.0083 (8)	0.000	0.000
Ni4	0.0158 (15)	0.0158 (15)	0.0083 (19)	0.0079 (7)	0.000	0.000
Ni5	0.0102 (19)	0.0102 (19)	0.009 (3)	0.0051 (10)	0.000	0.000

Geometric parameters (Å, º) top

Dy1—Ni4ⁱ	2.8595 (6)	Ni2—Ni2^xix	2.4730 (4)
Dy1—Ni4ⁱⁱ	2.8595 (6)	Ni2—Dy1^xx	3.0821 (11)
Dy1—Ni4ⁱⁱⁱ	2.8595 (6)	Ni2—Dy1^xxi	3.0821 (11)
Dy1—Ni3^iv	2.8603 (6)	Ni2—Dy1^xxii	3.0821 (11)
Dy1—Ni3^v	2.8603 (6)	Ni3—Ni1^iv	2.428 (4)
Dy1—Ni3^vi	2.8603 (6)	Ni3—Ni1^xvi	2.428 (4)
Dy1—Ni2^vii	3.0821 (11)	Ni3—Ni1^xv	2.428 (4)
Dy1—Ni2^viii	3.0821 (11)	Ni3—Ni2^xxiii	2.461 (4)
Dy1—Ni2^ix	3.0821 (11)	Ni3—Ni2^xxiv	2.461 (4)
Dy1—Ni2^x	3.0821 (11)	Ni3—Ni2^xxv	2.461 (4)
Dy1—Ni2	3.0821 (11)	Ni3—Ni4^xxvi	2.8556 (5)
Dy1—Ni2^xi	3.0821 (11)	Ni3—Ni4^xxvii	2.8556 (5)
Dy2—Ni1^xii	2.8283 (14)	Ni3—Ni4^xxviii	2.8556 (5)
Dy2—Ni1^xi	2.8283 (14)	Ni3—Dy1^iv	2.8603 (6)
Dy2—Ni1^vii	2.8283 (14)	Ni3—Dy1^v	2.8603 (6)
Dy2—Ni1	2.8283 (14)	Ni3—Dy1^vi	2.8603 (6)
Dy2—Ni1^xiii	2.8283 (14)	Ni4—Ni1^xxix	2.445 (4)
Dy2—Ni1^xiv	2.8283 (14)	Ni4—Ni1^xxx	2.445 (4)
Dy2—Ni5ⁱ	2.9374 (7)	Ni4—Ni1^xxxi	2.445 (4)
Dy2—Ni5ⁱⁱ	2.9374 (7)	Ni4—Ni2^xxiii	2.449 (3)
Dy2—Ni5ⁱⁱⁱ	2.9374 (7)	Ni4—Ni2^xxv	2.449 (3)
Dy2—Ni1^iv	3.096 (3)	Ni4—Ni2^xxiv	2.449 (3)
Dy2—Ni1^xv	3.096 (3)	Ni4—Ni3^xxvi	2.8556 (5)
Dy2—Ni1^xvi	3.096 (3)	Ni4—Ni3^xxvii	2.8556 (5)
Ni1—Ni3^iv	2.428 (4)	Ni4—Ni3^xxviii	2.8556 (5)
Ni1—Ni4ⁱ	2.445 (4)	Ni4—Dy1^xxix	2.8595 (6)
Ni1—Ni1^x	2.465 (5)	Ni4—Dy1^xxxii	2.8595 (6)
Ni1—Ni1^xiv	2.465 (5)	Ni4—Dy1^xxiv	2.8595 (6)
Ni1—Ni1^xiii	2.481 (5)	Ni5—Ni1^xxvi	2.510 (3)
Ni1—Ni1^xvii	2.481 (5)	Ni5—Ni1^xxix	2.510 (3)
Ni1—Ni5ⁱ	2.510 (3)	Ni5—Ni1^xxxiii	2.510 (3)
Ni1—Dy2^xviii	2.8283 (14)	Ni5—Ni1^xxxi	2.510 (3)
Ni1—Dy2^iv	3.096 (3)	Ni5—Ni1^xxxiv	2.510 (3)
Ni1—Dy1^xviii	3.265 (2)	Ni5—Ni1^xxx	2.510 (3)
Ni2—Ni4^iv	2.449 (3)	Ni5—Dy2^xxvi	2.9374 (7)
Ni2—Ni4ⁱⁱⁱ	2.449 (3)	Ni5—Dy2^xxix	2.9374 (7)
Ni2—Ni3^iv	2.461 (4)	Ni5—Dy2^xxvii	2.9374 (7)
Ni2—Ni3ⁱⁱⁱ	2.461 (4)	Ni5—Dy2^xxxii	2.9374 (7)
Ni2—Ni2^xiv	2.4730 (5)	Ni5—Dy2^xxviii	2.9374 (7)
Ni2—Ni2^viii	2.4730 (5)	Ni5—Dy2^xxiv	2.9374 (7)
Ni2—Ni2^x	2.4730 (5)

Ni4ⁱ—Dy1—Ni4ⁱⁱ	119.729 (16)	Ni2^viii—Ni2—Dy1^xx	113.652 (8)
Ni4ⁱ—Dy1—Ni4ⁱⁱⁱ	119.727 (16)	Ni2^x—Ni2—Dy1^xx	113.652 (8)
Ni4ⁱⁱ—Dy1—Ni4ⁱⁱⁱ	119.727 (16)	Ni2^xix—Ni2—Dy1^xx	66.348 (8)
Ni4ⁱ—Dy1—Ni3^iv	59.900 (4)	Ni4^iv—Ni2—Dy1^xxi	61.00 (3)
Ni4ⁱⁱ—Dy1—Ni3^iv	173.70 (14)	Ni4ⁱⁱⁱ—Ni2—Dy1^xxi	119.00 (3)
Ni4ⁱⁱⁱ—Dy1—Ni3^iv	59.901 (4)	Ni3^iv—Ni2—Dy1^xxi	119.08 (3)
Ni4ⁱ—Dy1—Ni3^v	173.70 (14)	Ni3ⁱⁱⁱ—Ni2—Dy1^xxi	60.92 (3)
Ni4ⁱⁱ—Dy1—Ni3^v	59.900 (4)	Ni2^xiv—Ni2—Dy1^xxi	113.652 (8)
Ni4ⁱⁱⁱ—Dy1—Ni3^v	59.901 (4)	Ni2^viii—Ni2—Dy1^xxi	66.348 (8)
Ni3^iv—Dy1—Ni3^v	119.67 (2)	Ni2^x—Ni2—Dy1^xxi	66.348 (8)
Ni4ⁱ—Dy1—Ni3^vi	59.901 (4)	Ni2^xix—Ni2—Dy1^xxi	113.652 (8)
Ni4ⁱⁱ—Dy1—Ni3^vi	59.901 (4)	Dy1^xx—Ni2—Dy1^xxi	180.00 (5)
Ni4ⁱⁱⁱ—Dy1—Ni3^vi	173.70 (14)	Ni4^iv—Ni2—Dy1	119.00 (3)
Ni3^iv—Dy1—Ni3^vi	119.67 (2)	Ni4ⁱⁱⁱ—Ni2—Dy1	61.00 (3)
Ni3^v—Dy1—Ni3^vi	119.67 (2)	Ni3^iv—Ni2—Dy1	60.92 (3)
Ni4ⁱ—Dy1—Ni2^vii	136.49 (8)	Ni3ⁱⁱⁱ—Ni2—Dy1	119.08 (3)
Ni4ⁱⁱ—Dy1—Ni2^vii	48.50 (7)	Ni2^xiv—Ni2—Dy1	113.652 (8)
Ni4ⁱⁱⁱ—Dy1—Ni2^vii	91.79 (5)	Ni2^viii—Ni2—Dy1	66.348 (8)
Ni3^iv—Dy1—Ni2^vii	136.72 (9)	Ni2^x—Ni2—Dy1	66.348 (8)
Ni3^v—Dy1—Ni2^vii	48.75 (8)	Ni2^xix—Ni2—Dy1	113.652 (8)
Ni3^vi—Dy1—Ni2^vii	91.97 (6)	Dy1^xx—Ni2—Dy1	106.71 (5)
Ni4ⁱ—Dy1—Ni2^viii	136.49 (8)	Dy1^xxi—Ni2—Dy1	73.29 (5)
Ni4ⁱⁱ—Dy1—Ni2^viii	91.79 (5)	Ni4^iv—Ni2—Dy1^xxii	61.00 (3)
Ni4ⁱⁱⁱ—Dy1—Ni2^viii	48.50 (7)	Ni4ⁱⁱⁱ—Ni2—Dy1^xxii	119.00 (3)
Ni3^iv—Dy1—Ni2^viii	91.97 (6)	Ni3^iv—Ni2—Dy1^xxii	119.08 (3)
Ni3^v—Dy1—Ni2^viii	48.75 (8)	Ni3ⁱⁱⁱ—Ni2—Dy1^xxii	60.92 (3)
Ni3^vi—Dy1—Ni2^viii	136.72 (9)	Ni2^xiv—Ni2—Dy1^xxii	66.348 (8)
Ni2^vii—Dy1—Ni2^viii	47.304 (17)	Ni2^viii—Ni2—Dy1^xxii	113.652 (8)
Ni4ⁱ—Dy1—Ni2^ix	91.79 (5)	Ni2^x—Ni2—Dy1^xxii	113.652 (8)
Ni4ⁱⁱ—Dy1—Ni2^ix	48.50 (7)	Ni2^xix—Ni2—Dy1^xxii	66.348 (8)
Ni4ⁱⁱⁱ—Dy1—Ni2^ix	136.49 (8)	Dy1^xx—Ni2—Dy1^xxii	73.29 (5)
Ni3^iv—Dy1—Ni2^ix	136.72 (9)	Dy1^xxi—Ni2—Dy1^xxii	106.71 (5)
Ni3^v—Dy1—Ni2^ix	91.97 (6)	Dy1—Ni2—Dy1^xxii	180.00 (5)
Ni3^vi—Dy1—Ni2^ix	48.75 (8)	Ni1^iv—Ni3—Ni1^xvi	61.02 (15)
Ni2^vii—Dy1—Ni2^ix	47.304 (17)	Ni1^iv—Ni3—Ni1^xv	61.02 (15)
Ni2^viii—Dy1—Ni2^ix	88.03 (4)	Ni1^xvi—Ni3—Ni1^xv	61.02 (15)
Ni4ⁱ—Dy1—Ni2^x	48.50 (7)	Ni1^iv—Ni3—Ni2^xxiii	108.64 (7)
Ni4ⁱⁱ—Dy1—Ni2^x	136.49 (8)	Ni1^xvi—Ni3—Ni2^xxiii	146.09 (3)
Ni4ⁱⁱⁱ—Dy1—Ni2^x	91.79 (5)	Ni1^xv—Ni3—Ni2^xxiii	146.09 (3)
Ni3^iv—Dy1—Ni2^x	48.75 (8)	Ni1^iv—Ni3—Ni2^xxiv	146.09 (3)
Ni3^v—Dy1—Ni2^x	136.72 (9)	Ni1^xvi—Ni3—Ni2^xxiv	146.09 (3)
Ni3^vi—Dy1—Ni2^x	91.97 (6)	Ni1^xv—Ni3—Ni2^xxiv	108.64 (7)
Ni2^vii—Dy1—Ni2^x	106.71 (5)	Ni2^xxiii—Ni3—Ni2^xxiv	60.33 (11)
Ni2^viii—Dy1—Ni2^x	88.03 (4)	Ni1^iv—Ni3—Ni2^xxv	146.09 (3)
Ni2^ix—Dy1—Ni2^x	88.03 (4)	Ni1^xvi—Ni3—Ni2^xxv	108.64 (7)
Ni4ⁱ—Dy1—Ni2	91.79 (5)	Ni1^xv—Ni3—Ni2^xxv	146.09 (3)
Ni4ⁱⁱ—Dy1—Ni2	136.49 (8)	Ni2^xxiii—Ni3—Ni2^xxv	60.33 (11)
Ni4ⁱⁱⁱ—Dy1—Ni2	48.50 (7)	Ni2^xxiv—Ni3—Ni2^xxv	60.33 (11)
Ni3^iv—Dy1—Ni2	48.75 (8)	Ni1^iv—Ni3—Ni4^xxvi	107.29 (14)
Ni3^v—Dy1—Ni2	91.97 (6)	Ni1^xvi—Ni3—Ni4^xxvi	107.29 (14)
Ni3^vi—Dy1—Ni2	136.72 (9)	Ni1^xv—Ni3—Ni4^xxvi	54.40 (11)
Ni2^vii—Dy1—Ni2	88.03 (4)	Ni2^xxiii—Ni3—Ni4^xxvi	106.62 (14)
Ni2^viii—Dy1—Ni2	47.304 (17)	Ni2^xxiv—Ni3—Ni4^xxvi	54.24 (9)
Ni2^ix—Dy1—Ni2	106.71 (5)	Ni2^xxv—Ni3—Ni4^xxvi	106.62 (14)
Ni2^x—Dy1—Ni2	47.304 (17)	Ni1^iv—Ni3—Ni4^xxvii	107.29 (14)
Ni4ⁱ—Dy1—Ni2^xi	48.50 (7)	Ni1^xvi—Ni3—Ni4^xxvii	54.40 (11)
Ni4ⁱⁱ—Dy1—Ni2^xi	91.79 (5)	Ni1^xv—Ni3—Ni4^xxvii	107.29 (14)
Ni4ⁱⁱⁱ—Dy1—Ni2^xi	136.49 (8)	Ni2^xxiii—Ni3—Ni4^xxvii	106.62 (14)
Ni3^iv—Dy1—Ni2^xi	91.97 (6)	Ni2^xxiv—Ni3—Ni4^xxvii	106.62 (14)
Ni3^v—Dy1—Ni2^xi	136.72 (9)	Ni2^xxv—Ni3—Ni4^xxvii	54.24 (9)
Ni3^vi—Dy1—Ni2^xi	48.75 (8)	Ni4^xxvi—Ni3—Ni4^xxvii	119.998 (3)
Ni2^vii—Dy1—Ni2^xi	88.03 (4)	Ni1^iv—Ni3—Ni4^xxviii	54.40 (11)
Ni2^viii—Dy1—Ni2^xi	106.71 (5)	Ni1^xvi—Ni3—Ni4^xxviii	107.29 (14)
Ni2^ix—Dy1—Ni2^xi	47.304 (17)	Ni1^xv—Ni3—Ni4^xxviii	107.29 (14)
Ni2^x—Dy1—Ni2^xi	47.304 (17)	Ni2^xxiii—Ni3—Ni4^xxviii	54.24 (9)
Ni2—Dy1—Ni2^xi	88.03 (4)	Ni2^xxiv—Ni3—Ni4^xxviii	106.62 (14)
Ni1^xii—Dy2—Ni1^xi	52.03 (11)	Ni2^xxv—Ni3—Ni4^xxviii	106.62 (14)
Ni1^xii—Dy2—Ni1^vii	51.67 (11)	Ni4^xxvi—Ni3—Ni4^xxviii	119.997 (3)
Ni1^xi—Dy2—Ni1^vii	98.44 (6)	Ni4^xxvii—Ni3—Ni4^xxviii	119.997 (3)
Ni1^xii—Dy2—Ni1	121.94 (10)	Ni1^iv—Ni3—Dy1^iv	75.76 (7)
Ni1^xi—Dy2—Ni1	98.44 (6)	Ni1^xvi—Ni3—Dy1^iv	129.19 (18)
Ni1^vii—Dy2—Ni1	98.44 (6)	Ni1^xv—Ni3—Dy1^iv	75.76 (7)
Ni1^xii—Dy2—Ni1^xiii	98.44 (6)	Ni2^xxiii—Ni3—Dy1^iv	70.34 (6)
Ni1^xi—Dy2—Ni1^xiii	51.67 (11)	Ni2^xxiv—Ni3—Dy1^iv	70.34 (6)
Ni1^vii—Dy2—Ni1^xiii	121.94 (10)	Ni2^xxv—Ni3—Dy1^iv	122.17 (17)
Ni1—Dy2—Ni1^xiii	52.03 (11)	Ni4^xxvi—Ni3—Dy1^iv	60.035 (7)
Ni1^xii—Dy2—Ni1^xiv	98.44 (6)	Ni4^xxvii—Ni3—Dy1^iv	176.4 (2)
Ni1^xi—Dy2—Ni1^xiv	121.94 (10)	Ni4^xxviii—Ni3—Dy1^iv	60.036 (7)
Ni1^vii—Dy2—Ni1^xiv	52.03 (11)	Ni1^iv—Ni3—Dy1^v	75.76 (7)
Ni1—Dy2—Ni1^xiv	51.67 (11)	Ni1^xvi—Ni3—Dy1^v	75.76 (7)
Ni1^xiii—Dy2—Ni1^xiv	98.44 (6)	Ni1^xv—Ni3—Dy1^v	129.19 (18)
Ni1^xii—Dy2—Ni5ⁱ	148.28 (6)	Ni2^xxiii—Ni3—Dy1^v	70.34 (6)
Ni1^xi—Dy2—Ni5ⁱ	96.44 (6)	Ni2^xxiv—Ni3—Dy1^v	122.17 (17)
Ni1^vii—Dy2—Ni5ⁱ	148.28 (6)	Ni2^xxv—Ni3—Dy1^v	70.34 (6)
Ni1—Dy2—Ni5ⁱ	51.56 (5)	Ni4^xxvi—Ni3—Dy1^v	176.4 (2)
Ni1^xiii—Dy2—Ni5ⁱ	51.56 (5)	Ni4^xxvii—Ni3—Dy1^v	60.035 (7)
Ni1^xiv—Dy2—Ni5ⁱ	96.44 (6)	Ni4^xxviii—Ni3—Dy1^v	60.036 (7)
Ni1^xii—Dy2—Ni5ⁱⁱ	51.56 (5)	Dy1^iv—Ni3—Dy1^v	119.67 (2)
Ni1^xi—Dy2—Ni5ⁱⁱ	51.56 (5)	Ni1^iv—Ni3—Dy1^vi	129.19 (18)
Ni1^vii—Dy2—Ni5ⁱⁱ	96.44 (6)	Ni1^xvi—Ni3—Dy1^vi	75.76 (7)
Ni1—Dy2—Ni5ⁱⁱ	148.28 (6)	Ni1^xv—Ni3—Dy1^vi	75.76 (7)
Ni1^xiii—Dy2—Ni5ⁱⁱ	96.44 (6)	Ni2^xxiii—Ni3—Dy1^vi	122.17 (17)
Ni1^xiv—Dy2—Ni5ⁱⁱ	148.28 (6)	Ni2^xxiv—Ni3—Dy1^vi	70.34 (6)
Ni5ⁱ—Dy2—Ni5ⁱⁱ	114.68 (3)	Ni2^xxv—Ni3—Dy1^vi	70.34 (6)
Ni1^xii—Dy2—Ni5ⁱⁱⁱ	96.44 (6)	Ni4^xxvi—Ni3—Dy1^vi	60.036 (7)
Ni1^xi—Dy2—Ni5ⁱⁱⁱ	148.28 (6)	Ni4^xxvii—Ni3—Dy1^vi	60.036 (7)
Ni1^vii—Dy2—Ni5ⁱⁱⁱ	51.56 (5)	Ni4^xxviii—Ni3—Dy1^vi	176.4 (2)
Ni1—Dy2—Ni5ⁱⁱⁱ	96.44 (6)	Dy1^iv—Ni3—Dy1^vi	119.67 (2)
Ni1^xiii—Dy2—Ni5ⁱⁱⁱ	148.28 (6)	Dy1^v—Ni3—Dy1^vi	119.67 (2)
Ni1^xiv—Dy2—Ni5ⁱⁱⁱ	51.56 (5)	Ni1^xxix—Ni4—Ni1^xxx	60.97 (14)
Ni5ⁱ—Dy2—Ni5ⁱⁱⁱ	114.68 (3)	Ni1^xxix—Ni4—Ni1^xxxi	60.97 (14)
Ni5ⁱⁱ—Dy2—Ni5ⁱⁱⁱ	114.68 (3)	Ni1^xxx—Ni4—Ni1^xxxi	60.97 (14)
Ni1^xii—Dy2—Ni1^iv	115.48 (5)	Ni1^xxix—Ni4—Ni2^xxiii	108.47 (6)
Ni1^xi—Dy2—Ni1^iv	141.21 (5)	Ni1^xxx—Ni4—Ni2^xxiii	146.02 (3)
Ni1^vii—Dy2—Ni1^iv	94.77 (8)	Ni1^xxxi—Ni4—Ni2^xxiii	146.02 (3)
Ni1—Dy2—Ni1^iv	115.48 (5)	Ni1^xxix—Ni4—Ni2^xxv	146.02 (3)
Ni1^xiii—Dy2—Ni1^iv	141.21 (5)	Ni1^xxx—Ni4—Ni2^xxv	146.02 (3)
Ni1^xiv—Dy2—Ni1^iv	94.77 (8)	Ni1^xxxi—Ni4—Ni2^xxv	108.47 (7)
Ni5ⁱ—Dy2—Ni1^iv	90.88 (5)	Ni2^xxiii—Ni4—Ni2^xxv	60.66 (9)
Ni5ⁱⁱ—Dy2—Ni1^iv	90.88 (5)	Ni1^xxix—Ni4—Ni2^xxiv	146.02 (3)
Ni5ⁱⁱⁱ—Dy2—Ni1^iv	49.08 (5)	Ni1^xxx—Ni4—Ni2^xxiv	108.47 (7)
Ni1^xii—Dy2—Ni1^xv	141.21 (5)	Ni1^xxxi—Ni4—Ni2^xxiv	146.02 (3)
Ni1^xi—Dy2—Ni1^xv	115.48 (5)	Ni2^xxiii—Ni4—Ni2^xxiv	60.66 (9)
Ni1^vii—Dy2—Ni1^xv	141.21 (5)	Ni2^xxv—Ni4—Ni2^xxiv	60.66 (9)
Ni1—Dy2—Ni1^xv	94.77 (8)	Ni1^xxix—Ni4—Ni3^xxvi	106.79 (14)
Ni1^xiii—Dy2—Ni1^xv	94.77 (8)	Ni1^xxx—Ni4—Ni3^xxvi	53.85 (12)
Ni1^xiv—Dy2—Ni1^xv	115.48 (5)	Ni1^xxxi—Ni4—Ni3^xxvi	106.79 (14)
Ni5ⁱ—Dy2—Ni1^xv	49.08 (5)	Ni2^xxiii—Ni4—Ni3^xxvi	107.19 (13)
Ni5ⁱⁱ—Dy2—Ni1^xv	90.88 (5)	Ni2^xxv—Ni4—Ni3^xxvi	107.20 (13)
Ni5ⁱⁱⁱ—Dy2—Ni1^xv	90.88 (5)	Ni2^xxiv—Ni4—Ni3^xxvi	54.62 (10)
Ni1^iv—Dy2—Ni1^xv	46.92 (9)	Ni1^xxix—Ni4—Ni3^xxvii	106.79 (14)
Ni1^xii—Dy2—Ni1^xvi	94.77 (8)	Ni1^xxx—Ni4—Ni3^xxvii	106.79 (14)
Ni1^xi—Dy2—Ni1^xvi	94.77 (8)	Ni1^xxxi—Ni4—Ni3^xxvii	53.85 (12)
Ni1^vii—Dy2—Ni1^xvi	115.48 (5)	Ni2^xxiii—Ni4—Ni3^xxvii	107.19 (13)
Ni1—Dy2—Ni1^xvi	141.21 (5)	Ni2^xxv—Ni4—Ni3^xxvii	54.62 (10)
Ni1^xiii—Dy2—Ni1^xvi	115.48 (5)	Ni2^xxiv—Ni4—Ni3^xxvii	107.20 (13)
Ni1^xiv—Dy2—Ni1^xvi	141.21 (5)	Ni3^xxvi—Ni4—Ni3^xxvii	119.998 (3)
Ni5ⁱ—Dy2—Ni1^xvi	90.88 (5)	Ni1^xxix—Ni4—Ni3^xxviii	53.85 (12)
Ni5ⁱⁱ—Dy2—Ni1^xvi	49.08 (5)	Ni1^xxx—Ni4—Ni3^xxviii	106.79 (14)
Ni5ⁱⁱⁱ—Dy2—Ni1^xvi	90.88 (5)	Ni1^xxxi—Ni4—Ni3^xxviii	106.79 (14)
Ni1^iv—Dy2—Ni1^xvi	46.92 (9)	Ni2^xxiii—Ni4—Ni3^xxviii	54.62 (10)
Ni1^xv—Dy2—Ni1^xvi	46.92 (9)	Ni2^xxv—Ni4—Ni3^xxviii	107.20 (13)
Ni3^iv—Ni1—Ni4ⁱ	71.75 (10)	Ni2^xxiv—Ni4—Ni3^xxviii	107.20 (13)
Ni3^iv—Ni1—Ni1^x	59.49 (7)	Ni3^xxvi—Ni4—Ni3^xxviii	119.997 (3)
Ni4ⁱ—Ni1—Ni1^x	120.49 (7)	Ni3^xxvii—Ni4—Ni3^xxviii	119.997 (3)
Ni3^iv—Ni1—Ni1^xiv	59.49 (7)	Ni1^xxix—Ni4—Dy1^xxix	75.52 (6)
Ni4ⁱ—Ni1—Ni1^xiv	120.49 (7)	Ni1^xxx—Ni4—Dy1^xxix	128.87 (16)
Ni1^x—Ni1—Ni1^xiv	60.0	Ni1^xxxi—Ni4—Dy1^xxix	75.52 (6)
Ni3^iv—Ni1—Ni1^xiii	120.51 (7)	Ni2^xxiii—Ni4—Dy1^xxix	70.51 (6)
Ni4ⁱ—Ni1—Ni1^xiii	59.51 (7)	Ni2^xxv—Ni4—Dy1^xxix	70.51 (6)
Ni1^x—Ni1—Ni1^xiii	180.00 (13)	Ni2^xxiv—Ni4—Dy1^xxix	122.66 (14)
Ni1^xiv—Ni1—Ni1^xiii	120.000 (1)	Ni3^xxvi—Ni4—Dy1^xxix	177.3 (2)
Ni3^iv—Ni1—Ni1^xvii	120.51 (7)	Ni3^xxvii—Ni4—Dy1^xxix	60.063 (7)
Ni4ⁱ—Ni1—Ni1^xvii	59.51 (7)	Ni3^xxviii—Ni4—Dy1^xxix	60.064 (7)
Ni1^x—Ni1—Ni1^xvii	120.000 (1)	Ni1^xxix—Ni4—Dy1^xxxii	75.52 (6)
Ni1^xiv—Ni1—Ni1^xvii	180.00 (13)	Ni1^xxx—Ni4—Dy1^xxxii	75.52 (6)
Ni1^xiii—Ni1—Ni1^xvii	60.000 (1)	Ni1^xxxi—Ni4—Dy1^xxxii	128.87 (16)
Ni3^iv—Ni1—Ni5ⁱ	178.91 (14)	Ni2^xxiii—Ni4—Dy1^xxxii	70.51 (6)
Ni4ⁱ—Ni1—Ni5ⁱ	109.34 (12)	Ni2^xxv—Ni4—Dy1^xxxii	122.66 (14)
Ni1^x—Ni1—Ni5ⁱ	119.62 (5)	Ni2^xxiv—Ni4—Dy1^xxxii	70.51 (6)
Ni1^xiv—Ni1—Ni5ⁱ	119.62 (5)	Ni3^xxvi—Ni4—Dy1^xxxii	60.063 (7)
Ni1^xiii—Ni1—Ni5ⁱ	60.38 (5)	Ni3^xxvii—Ni4—Dy1^xxxii	177.3 (2)
Ni1^xvii—Ni1—Ni5ⁱ	60.38 (5)	Ni3^xxviii—Ni4—Dy1^xxxii	60.064 (7)
Ni3^iv—Ni1—Dy2^xviii	113.21 (6)	Dy1^xxix—Ni4—Dy1^xxxii	119.728 (17)
Ni4ⁱ—Ni1—Dy2^xviii	113.10 (7)	Ni1^xxix—Ni4—Dy1^xxiv	128.86 (16)
Ni1^x—Ni1—Dy2^xviii	64.16 (6)	Ni1^xxx—Ni4—Dy1^xxiv	75.52 (6)
Ni1^xiv—Ni1—Dy2^xviii	116.01 (6)	Ni1^xxxi—Ni4—Dy1^xxiv	75.52 (6)
Ni1^xiii—Ni1—Dy2^xviii	115.84 (5)	Ni2^xxiii—Ni4—Dy1^xxiv	122.66 (14)
Ni1^xvii—Ni1—Dy2^xviii	63.99 (6)	Ni2^xxv—Ni4—Dy1^xxiv	70.50 (6)
Ni5ⁱ—Ni1—Dy2^xviii	66.46 (5)	Ni2^xxiv—Ni4—Dy1^xxiv	70.50 (6)
Ni3^iv—Ni1—Dy2	113.21 (6)	Ni3^xxvi—Ni4—Dy1^xxiv	60.064 (7)
Ni4ⁱ—Ni1—Dy2	113.10 (7)	Ni3^xxvii—Ni4—Dy1^xxiv	60.064 (7)
Ni1^x—Ni1—Dy2	116.01 (6)	Ni3^xxviii—Ni4—Dy1^xxiv	177.3 (2)
Ni1^xiv—Ni1—Dy2	64.16 (6)	Dy1^xxix—Ni4—Dy1^xxiv	119.727 (17)
Ni1^xiii—Ni1—Dy2	63.99 (6)	Dy1^xxxii—Ni4—Dy1^xxiv	119.727 (17)
Ni1^xvii—Ni1—Dy2	115.84 (5)	Ni1^xxvi—Ni5—Ni1^xxix	180.00 (6)
Ni5ⁱ—Ni1—Dy2	66.46 (5)	Ni1^xxvi—Ni5—Ni1^xxxiii	59.24 (10)
Dy2^xviii—Ni1—Dy2	121.94 (10)	Ni1^xxix—Ni5—Ni1^xxxiii	120.76 (10)
Ni3^iv—Ni1—Dy2^iv	116.74 (12)	Ni1^xxvi—Ni5—Ni1^xxxi	120.76 (10)
Ni4ⁱ—Ni1—Dy2^iv	171.51 (13)	Ni1^xxix—Ni5—Ni1^xxxi	59.24 (10)
Ni1^x—Ni1—Dy2^iv	66.54 (4)	Ni1^xxxiii—Ni5—Ni1^xxxi	180.000 (1)
Ni1^xiv—Ni1—Dy2^iv	66.54 (4)	Ni1^xxvi—Ni5—Ni1^xxxiv	59.24 (10)
Ni1^xiii—Ni1—Dy2^iv	113.46 (4)	Ni1^xxix—Ni5—Ni1^xxxiv	120.76 (10)
Ni1^xvii—Ni1—Dy2^iv	113.46 (4)	Ni1^xxxiii—Ni5—Ni1^xxxiv	59.24 (10)
Ni5ⁱ—Ni1—Dy2^iv	62.17 (6)	Ni1^xxxi—Ni5—Ni1^xxxiv	120.76 (11)
Dy2^xviii—Ni1—Dy2^iv	64.52 (5)	Ni1^xxvi—Ni5—Ni1^xxx	120.76 (10)
Dy2—Ni1—Dy2^iv	64.52 (5)	Ni1^xxix—Ni5—Ni1^xxx	59.24 (10)
Ni3^iv—Ni1—Dy1	58.12 (5)	Ni1^xxxiii—Ni5—Ni1^xxx	120.76 (11)
Ni4ⁱ—Ni1—Dy1	58.00 (5)	Ni1^xxxi—Ni5—Ni1^xxx	59.24 (10)
Ni1^x—Ni1—Dy1	112.33 (5)	Ni1^xxxiv—Ni5—Ni1^xxx	180.000 (1)
Ni1^xiv—Ni1—Dy1	67.82 (5)	Ni1^xxvi—Ni5—Dy2^xxvi	61.98 (3)
Ni1^xiii—Ni1—Dy1	67.67 (5)	Ni1^xxix—Ni5—Dy2^xxvi	118.02 (3)
Ni1^xvii—Ni1—Dy1	112.18 (5)	Ni1^xxxiii—Ni5—Dy2^xxvi	61.98 (3)
Ni5ⁱ—Ni1—Dy1	122.36 (6)	Ni1^xxxi—Ni5—Dy2^xxvi	118.02 (3)
Dy2^xviii—Ni1—Dy1	168.27 (8)	Ni1^xxxiv—Ni5—Dy2^xxvi	111.25 (7)
Dy2—Ni1—Dy1	69.79 (4)	Ni1^xxx—Ni5—Dy2^xxvi	68.75 (7)
Dy2^iv—Ni1—Dy1	125.48 (5)	Ni1^xxvi—Ni5—Dy2^xxix	118.02 (3)
Ni3^iv—Ni1—Dy1^xviii	58.12 (5)	Ni1^xxix—Ni5—Dy2^xxix	61.98 (3)
Ni4ⁱ—Ni1—Dy1^xviii	58.00 (5)	Ni1^xxxiii—Ni5—Dy2^xxix	118.03 (3)
Ni1^x—Ni1—Dy1^xviii	67.82 (5)	Ni1^xxxi—Ni5—Dy2^xxix	61.97 (3)
Ni1^xiv—Ni1—Dy1^xviii	112.33 (5)	Ni1^xxxiv—Ni5—Dy2^xxix	68.75 (7)
Ni1^xiii—Ni1—Dy1^xviii	112.18 (5)	Ni1^xxx—Ni5—Dy2^xxix	111.25 (7)
Ni1^xvii—Ni1—Dy1^xviii	67.67 (5)	Dy2^xxvi—Ni5—Dy2^xxix	180.0
Ni5ⁱ—Ni1—Dy1^xviii	122.36 (6)	Ni1^xxvi—Ni5—Dy2^xxvii	61.98 (3)
Dy2^xviii—Ni1—Dy1^xviii	69.79 (4)	Ni1^xxix—Ni5—Dy2^xxvii	118.02 (3)
Dy2—Ni1—Dy1^xviii	168.27 (8)	Ni1^xxxiii—Ni5—Dy2^xxvii	111.25 (7)
Dy2^iv—Ni1—Dy1^xviii	125.48 (5)	Ni1^xxxi—Ni5—Dy2^xxvii	68.75 (7)
Dy1—Ni1—Dy1^xviii	98.49 (8)	Ni1^xxxiv—Ni5—Dy2^xxvii	61.98 (3)
Ni4^iv—Ni2—Ni4ⁱⁱⁱ	180.00 (11)	Ni1^xxx—Ni5—Dy2^xxvii	118.02 (3)
Ni4^iv—Ni2—Ni3^iv	108.86 (8)	Dy2^xxvi—Ni5—Dy2^xxvii	114.68 (3)
Ni4ⁱⁱⁱ—Ni2—Ni3^iv	71.14 (8)	Dy2^xxix—Ni5—Dy2^xxvii	65.32 (3)
Ni4^iv—Ni2—Ni3ⁱⁱⁱ	71.14 (8)	Ni1^xxvi—Ni5—Dy2^xxxii	118.02 (3)
Ni4ⁱⁱⁱ—Ni2—Ni3ⁱⁱⁱ	108.86 (8)	Ni1^xxix—Ni5—Dy2^xxxii	61.98 (3)
Ni3^iv—Ni2—Ni3ⁱⁱⁱ	180.00 (13)	Ni1^xxxiii—Ni5—Dy2^xxxii	68.75 (7)
Ni4^iv—Ni2—Ni2^xiv	59.67 (5)	Ni1^xxxi—Ni5—Dy2^xxxii	111.25 (7)
Ni4ⁱⁱⁱ—Ni2—Ni2^xiv	120.33 (5)	Ni1^xxxiv—Ni5—Dy2^xxxii	118.03 (3)
Ni3^iv—Ni2—Ni2^xiv	59.83 (5)	Ni1^xxx—Ni5—Dy2^xxxii	61.97 (3)
Ni3ⁱⁱⁱ—Ni2—Ni2^xiv	120.17 (5)	Dy2^xxvi—Ni5—Dy2^xxxii	65.32 (3)
Ni4^iv—Ni2—Ni2^viii	120.33 (5)	Dy2^xxix—Ni5—Dy2^xxxii	114.68 (3)
Ni4ⁱⁱⁱ—Ni2—Ni2^viii	59.67 (5)	Dy2^xxvii—Ni5—Dy2^xxxii	180.00 (7)
Ni3^iv—Ni2—Ni2^viii	120.17 (5)	Ni1^xxvi—Ni5—Dy2^xxviii	111.24 (7)
Ni3ⁱⁱⁱ—Ni2—Ni2^viii	59.83 (5)	Ni1^xxix—Ni5—Dy2^xxviii	68.76 (7)
Ni2^xiv—Ni2—Ni2^viii	180.0	Ni1^xxxiii—Ni5—Dy2^xxviii	61.97 (3)
Ni4^iv—Ni2—Ni2^x	59.67 (5)	Ni1^xxxi—Ni5—Dy2^xxviii	118.03 (3)
Ni4ⁱⁱⁱ—Ni2—Ni2^x	120.33 (5)	Ni1^xxxiv—Ni5—Dy2^xxviii	61.97 (3)
Ni3^iv—Ni2—Ni2^x	59.83 (5)	Ni1^xxx—Ni5—Dy2^xxviii	118.03 (3)
Ni3ⁱⁱⁱ—Ni2—Ni2^x	120.17 (5)	Dy2^xxvi—Ni5—Dy2^xxviii	114.68 (3)
Ni2^xiv—Ni2—Ni2^x	60.0	Dy2^xxix—Ni5—Dy2^xxviii	65.32 (3)
Ni2^viii—Ni2—Ni2^x	120.0	Dy2^xxvii—Ni5—Dy2^xxviii	114.68 (3)
Ni4^iv—Ni2—Ni2^xix	120.33 (5)	Dy2^xxxii—Ni5—Dy2^xxviii	65.32 (3)
Ni4ⁱⁱⁱ—Ni2—Ni2^xix	59.67 (5)	Ni1^xxvi—Ni5—Dy2^xxiv	68.76 (7)
Ni3^iv—Ni2—Ni2^xix	120.17 (5)	Ni1^xxix—Ni5—Dy2^xxiv	111.24 (7)
Ni3ⁱⁱⁱ—Ni2—Ni2^xix	59.83 (5)	Ni1^xxxiii—Ni5—Dy2^xxiv	118.03 (3)
Ni2^xiv—Ni2—Ni2^xix	120.0	Ni1^xxxi—Ni5—Dy2^xxiv	61.97 (3)
Ni2^viii—Ni2—Ni2^xix	60.0	Ni1^xxxiv—Ni5—Dy2^xxiv	118.03 (3)
Ni2^x—Ni2—Ni2^xix	180.0	Ni1^xxx—Ni5—Dy2^xxiv	61.97 (3)
Ni4^iv—Ni2—Dy1^xx	119.00 (3)	Dy2^xxvi—Ni5—Dy2^xxiv	65.32 (3)
Ni4ⁱⁱⁱ—Ni2—Dy1^xx	61.00 (3)	Dy2^xxix—Ni5—Dy2^xxiv	114.68 (3)
Ni3^iv—Ni2—Dy1^xx	60.92 (3)	Dy2^xxvii—Ni5—Dy2^xxiv	65.32 (3)
Ni3ⁱⁱⁱ—Ni2—Dy1^xx	119.08 (3)	Dy2^xxxii—Ni5—Dy2^xxiv	114.68 (3)
Ni2^xiv—Ni2—Dy1^xx	66.348 (8)	Dy2^xxviii—Ni5—Dy2^xxiv	180.00 (7)

Symmetry codes: (i) x+1/3, y+2/3, z−1/3; (ii) x−2/3, y−1/3, z−1/3; (iii) x+1/3, y−1/3, z−1/3; (iv) −x+2/3, −y+1/3, −z+1/3; (v) −x−1/3, −y−2/3, −z+1/3; (vi) −x−1/3, −y+1/3, −z+1/3; (vii) −x+y, −x, z; (viii) −y, x−y−1, z; (ix) x−1, y, z; (x) −x+y+1, −x+1, z; (xi) −y, x−y, z; (xii) x−1, y−1, z; (xiii) −x+y, −x+1, z; (xiv) −y+1, x−y, z; (xv) y−1/3, −x+y+1/3, −z+1/3; (xvi) x−y−1/3, x−2/3, −z+1/3; (xvii) −y+1, x−y+1, z; (xviii) x+1, y+1, z; (xix) −x+y+1, −x, z; (xx) x+1, y, z; (xxi) −x, −y, −z; (xxii) −x+1, −y, −z; (xxiii) −x+y+2/3, −x+1/3, z+1/3; (xxiv) x−1/3, y+1/3, z+1/3; (xxv) −y−1/3, x−y−2/3, z+1/3; (xxvi) −x+1/3, −y+2/3, −z+2/3; (xxvii) −x−2/3, −y−1/3, −z+2/3; (xxviii) −x+1/3, −y−1/3, −z+2/3; (xxix) x−1/3, y−2/3, z+1/3; (xxx) −y+2/3, x−y+1/3, z+1/3; (xxxi) −x+y−1/3, −x+1/3, z+1/3; (xxxii) x+2/3, y+1/3, z+1/3; (xxxiii) x−y+1/3, x−1/3, −z+2/3; (xxxiv) y−2/3, −x+y−1/3, −z+2/3.

Experimental details

Crystal data
Chemical formula	Dy₂Ni₇
M_r	735.97
Crystal system, space group	Trigonal, R3m
Temperature (K)	293
a, c (Å)	4.9460 (9), 36.191 (9)
V (Å³)	766.7 (3)
Z	6
Radiation type	Mo Kα
µ (mm⁻¹)	53.83
Crystal size (mm)	0.14 × 0.09 × 0.06

Data collection
Diffractometer	Stoe IPDS II diffractometer
Absorption correction	Numerical (X-RED; Stoe & Cie, 2009)
T_min, T_max	0.067, 0.135
No. of measured, independent and observed [I > 2σ(I)] reflections	372, 253, 208
R_int	0.027
(sin θ/λ)_max (Å⁻¹)	0.633

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.047, 0.115, 1.07
No. of reflections	253
No. of parameters	25
Δρ_max, Δρ_min (e Å⁻³)	5.07, −2.37

Computer programs: X-AREA (Stoe & Cie, 2009), SIR2011 (Burla et al., 2012), SHELXL97 (Sheldrick, 2008) and WinGX (Farrugia, 1999), DIAMOND (Brandenburg, 2006), publCIF (Westrip, 2010).

References

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