Sr₃Al₁₀SiO₂₀ from single-crystal data

Single crystals of tris­trontium deca­aluminum silicon icosa­oxide were synthesized by local flux growth with H₃BO₃ as mineralizer. Lattice parameters and refinement data indicate no significant incorporation of B in the structure. Pairs of AlO₆ octa­hedra are located between layers of edge-linked Al/Si-O₄ tetra­hedra. The Sr1 (2/m symmetry) and Sr2 (mirror plane) sites are orientated in layers perpendicular to the layers of Al/Si-O polyhedra.

Key indicators

• Single-crystal X-ray study
• T = 298 K
• Mean [sigma](l-O) = 0.002 Å
• Disorder in main residue
• R factor = 0.036
• wR factor = 0.032
• Data-to-parameter ratio = 11.9

checkCIF/PLATON results

No syntax errors found



Alert level C
PLAT042_ALERT_1_C Calc. and Rep. MoietyFormula Strings Differ ....          ?
PLAT061_ALERT_3_C Tmax/Tmin Range Test RR' too Large .............       0.76
PLAT062_ALERT_4_C Rescale T(min) & T(max) by .....................       0.28
PLAT301_ALERT_3_C Main Residue  Disorder .........................      20.00 Perc.

   0 ALERT level A = In general: serious problem
   0 ALERT level B = Potentially serious problem
   4 ALERT level C = Check and explain
   0 ALERT level G = General alerts; check

   1 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   0 ALERT type 2 Indicator that the structure model may be wrong or deficient
   2 ALERT type 3 Indicator that the structure quality may be low
   1 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check

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Computing details

Data collection: SMART (Bruker, 2001); cell refinement: SAINT (Bruker, 1999); data reduction: Xtal3.2 (Hall et al., 1992); program(s) used to solve structure: Xtal3.2; program(s) used to refine structure: Xtal3.2; molecular graphics: Xtal3.2; software used to prepare material for publication: Xtal3.2.

tristrontium decaaluminum silicon icosaoxide

Crystal data

Sr3Al10SiO20	F(000) = 836
Mr = 880.75	Dx = 3.707 Mg m^−3
Monoclinic, C2/m	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -C 2y	Cell parameters from 4207 reflections
a = 15.1438 (18) Å	θ = 2.3–30.5°
b = 11.1858 (13) Å	µ = 10.86 mm^−1
c = 4.9018 (6) Å	T = 298 K
β = 108.137 (2)°	Splinter, colourless
V = 789.09 (16) Å^3	0.14 × 0.11 × 0.09 × 0.11 (radius) mm
Z = 2

Data collection

Siemens SMART APEX diffractometer	1022 reflections with I > 3σ(I)
Detector resolution: 512 pixels mm^-1	Rint = 0.033
ω scans	θmax = 30.5°, θmin = 2.3°
Absorption correction: spherical (Tibballs, 1982)	h = −21→21
Tmin = 0.302, Tmax = 0.318	k = −15→15
4207 measured reflections	l = −6→5
1261 independent reflections

Refinement

Refinement on F	0 restraints
Least-squares matrix: full	18 constraints
R[F^2 > 2σ(F^2)] = 0.036
wR(F^2) = 0.032	(Δ/σ)max = 0.001
S = 1.70	Δρmax = 1.66 e Å^−3
1022 reflections	Δρmin = −1.15 e Å^−3
86 parameters

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

	x	y	z	Uiso*/Ueq	Occ. (<1)
Sr1	0.21635 (2)	0.00000	0.73858 (8)	0.00000
Sr2	0.00000	0.50000	0.00000	0.00000
Al1	0.13606 (4)	0.21238 (6)	0.16268 (14)	0.00000	.87500
Si1	0.13606 (4)	0.21238 (6)	0.16268 (14)	0.00000	.12500
Al2	0.35532 (4)	0.13768 (6)	0.34386 (15)	0.00000	.87500
Si2	0.35532 (4)	0.13768 (6)	0.34386 (15)	0.00000	.12500
Al3	0.00000	0.12868 (8)	0.50000	0.00000
Al4	0.00000	0.00000	0.00000	0.00000
O1	0.08364 (10)	0.24773 (13)	0.4294 (3)	0.00000
O2	0.24036 (10)	0.14101 (14)	0.3245 (4)	0.00000
O3	0.35984 (10)	0.14704 (14)	−0.0061 (3)	0.00000
O4	0.42704 (9)	0.37941 (13)	0.1108 (3)	0.00000
O5	0.06564 (13)	0.00000	0.3873 (4)	0.00000
O6	0.40080 (14)	0.00000	0.4793 (5)	0.00000

Atomic displacement parameters (Ų)

	U^11	U^22	U^33	U^12	U^13	U^23
Sr1	0.01130 (15)	0.01460 (18)	0.0185 (2)	0.00000	−0.00227 (13)	0.00000
Sr2	0.0118 (2)	0.0189 (3)	0.0135 (3)	0.00000	0.00093 (17)	0.00000
Al1	0.0075 (3)	0.0082 (3)	0.0067 (3)	−0.0003 (2)	0.0030 (2)	−0.0006 (3)
Si1	0.0075 (3)	0.0082 (3)	0.0067 (3)	−0.0003 (2)	0.0030 (2)	−0.0006 (3)
Al2	0.0081 (3)	0.0072 (3)	0.0073 (3)	−0.0007 (3)	0.0024 (2)	−0.0006 (3)
Si2	0.0081 (3)	0.0072 (3)	0.0073 (3)	−0.0007 (3)	0.0024 (2)	−0.0006 (3)
Al3	0.0076 (4)	0.0077 (5)	0.0059 (5)	0.00000	0.0032 (4)	0.00000
Al4	0.0077 (6)	0.0078 (6)	0.0063 (7)	0.00000	0.0027 (5)	0.00000
O1	0.0096 (7)	0.0097 (8)	0.0108 (8)	−0.0011 (6)	0.0031 (6)	−0.0007 (7)
O2	0.0083 (7)	0.0122 (8)	0.0201 (10)	−0.0021 (6)	0.0029 (7)	−0.0002 (7)
O3	0.0171 (8)	0.0105 (8)	0.0096 (9)	−0.0022 (6)	0.0052 (6)	−0.0013 (7)
O4	0.0090 (7)	0.0087 (8)	0.0083 (8)	−0.0027 (6)	0.0015 (6)	−0.0000 (6)
O5	0.0068 (9)	0.0084 (11)	0.0050 (11)	0.00000	0.0012 (8)	0.00000
O6	0.0151 (11)	0.0097 (11)	0.0126 (13)	0.00000	0.0005 (9)	0.00000

Geometric parameters (Å, º)

Sr1^i—O5^i	2.3932 (17)	Al3^i—O4	1.8856 (14)
Sr1^i—O2^ii	2.6832 (18)	Al3^i—O4	1.8856 (14)
Sr1^i—O2^i	2.6832 (18)	Al3^i—O5^i	1.9253 (17)
Sr1^i—O3	2.7018 (15)	Al3^i—O5	1.9253 (17)
Sr1^i—O3	2.7018 (15)	Al3^i—O1	1.9417 (17)
Sr1^i—O4	2.8420 (16)	Al3^i—O1^i	1.9417 (17)
Sr1^i—O4	2.8420 (16)	Al4—O5	1.849 (2)
Sr1^i—O2	3.1967 (18)	Al4—O5	1.849 (2)
Sr1^i—O2	3.1967 (18)	Al4—O4	1.9259 (16)
Sr1^i—O6^i	3.410 (3)	Al4—O4	1.9259 (16)
Sr1^i—O1^ii	3.4812 (14)	Al4—O4	1.9259 (16)
Sr1^i—O1^i	3.4812 (14)	Al4—O4	1.9259 (16)
Sr2—O6^i	2.527 (2)	O1^i—O4	2.712 (2)
Sr2—O6	2.527 (2)	O1^i—O3	2.744 (3)
Sr2—O3	2.6781 (16)	O1^i—O5^i	2.7858 (15)
Sr2—O3	2.6781 (16)	O1^i—O4	2.7893 (19)
Sr2—O3	2.6781 (16)	O1^i—O1	2.826 (2)
Sr2—O3	2.6781 (16)	O1^i—O2^i	2.843 (2)
Sr2—O6	3.158 (3)	O1^i—O2	2.847 (2)
Sr2—O6	3.158 (3)	O1^i—O6	2.8553 (15)
Sr2^i—O1	3.5126 (14)	O1^i—O3	2.933 (2)
Sr2^i—O1	3.5126 (14)	O1^i—O4	2.966 (2)
Sr2^i—O1^iii	3.5126 (14)	O2^i—O4	2.7685 (18)
Sr2^i—O1^i	3.5126 (14)	O2^i—O3^i	2.780 (3)
Al1^i—O4	1.7226 (15)	O2^i—O6^i	2.796 (2)
Al1^i—O2^i	1.7267 (15)	O2^i—O2	2.946 (2)
Al1^i—O3	1.7595 (17)	O2^i—O3	2.981 (2)
Al1^i—O1^i	1.773 (2)	O2^i—O2^ii	3.155 (2)
Al1^i—O5^i	2.9537 (16)	O2^i—O5^i	3.177 (2)
Si1^i—O4	1.7226 (15)	O2^i—O3	3.217 (2)
Si1^i—O2^i	1.7267 (15)	O3—O4	2.785 (2)
Si1^i—O3	1.7595 (17)	O3—O6	2.799 (2)
Si1^i—O1^i	1.773 (2)	O3—O6^i	3.229 (3)
Si1^i—O5^i	2.9537 (16)	O3—O3	3.289 (2)
Al2—O2	1.7141 (17)	O4—O5	2.508 (2)
Al2—O6	1.7327 (11)	O4—O4	2.698 (2)
Al2—O3	1.741 (2)	O4—O4	2.749 (2)
Al2—O1^i	1.7587 (15)	O4—O5^i	2.777 (3)
Si2—O2	1.7141 (17)	O4—O5	2.822 (3)
Si2—O6	1.7327 (11)	O5^i—O5	2.557 (3)
Si2—O3	1.741 (2)	O6—O6	2.948 (3)
Si2—O1^i	1.7587 (15)
O5^i—Sr1^i—O2^ii	77.25 (5)	Sr1^i—O3—O3	52.50 (4)
O5^i—Sr1^i—O2^i	77.25 (5)	O1—O3—O2	149.76 (7)
O5^i—Sr1^i—O3	141.50 (3)	O1—O3—O4	64.87 (6)
O5^i—Sr1^i—O3	141.50 (3)	O1—O3—O6	148.90 (8)
O5^i—Sr1^i—O4	63.40 (6)	O1—O3—O1	119.37 (7)
O5^i—Sr1^i—O4	63.40 (6)	O1—O3—O2	59.38 (6)
O5^i—Sr1^i—O2	117.56 (5)	O1—O3—O2^i	56.39 (5)
O5^i—Sr1^i—O2	117.56 (5)	O1—O3—O6^i	56.41 (5)
O2^ii—Sr1^i—O2^i	72.01 (5)	O1—O3—O3	115.40 (7)
O2^ii—Sr1^i—O3	73.37 (5)	O2—O3—O4	99.50 (7)
O2^ii—Sr1^i—O3	115.43 (5)	O2—O3—O6	60.16 (7)
O2^ii—Sr1^i—O4	102.23 (5)	O2—O3—O1	59.71 (6)
O2^ii—Sr1^i—O4	140.34 (4)	O2—O3—O2	90.40 (7)
O2^ii—Sr1^i—O2	112.66 (5)	O2—O3—O2^i	109.43 (6)
O2^ii—Sr1^i—O2	164.89 (4)	O2—O3—O6^i	139.56 (7)
O2^i—Sr1^i—O3	115.43 (5)	O2—O3—O3	88.61 (6)
O2^i—Sr1^i—O3	73.37 (5)	O4—O3—O6	113.79 (6)
O2^i—Sr1^i—O4	140.34 (4)	O4—O3—O1	56.55 (5)
O2^i—Sr1^i—O4	102.23 (5)	O4—O3—O2	57.27 (5)
O2^i—Sr1^i—O2	164.89 (4)	O4—O3—O2^i	106.43 (6)
O2^i—Sr1^i—O2	112.66 (5)	O4—O3—O6^i	119.30 (8)
O3—Sr1^i—O3	75.00 (5)	O4—O3—O3	158.95 (6)
O3—Sr1^i—O4	99.21 (5)	O6—O3—O1	59.70 (5)
O3—Sr1^i—O4	137.55 (5)	O6—O3—O2	148.72 (9)
O3—Sr1^i—O2	55.48 (5)	O6—O3—O2^i	139.49 (7)
O3—Sr1^i—O2	91.95 (4)	O6—O3—O6^i	108.61 (6)
O3—Sr1^i—O4	137.55 (5)	O6—O3—O3	54.01 (5)
O3—Sr1^i—O4	99.21 (5)	O1—O3—O2	97.68 (6)
O3—Sr1^i—O2	91.95 (4)	O1—O3—O2^i	153.41 (7)
O3—Sr1^i—O2	55.48 (5)	O1—O3—O6^i	152.61 (7)
O4—Sr1^i—O4	56.67 (4)	O1—O3—O3	113.66 (6)
O4—Sr1^i—O2	54.19 (4)	O2—O3—O2^i	56.60 (5)
O4—Sr1^i—O2	83.30 (4)	O2—O3—O6^i	100.74 (6)
O4—Sr1^i—O2	83.30 (4)	O2—O3—O3	142.69 (6)
O4—Sr1^i—O2	54.19 (4)	O2^i—O3—O6^i	51.42 (5)
O2—Sr1^i—O2	59.13 (4)	O2^i—O3—O3	88.80 (5)
O6^i—Sr2—O6	180.0000	O6^i—O3—O3	59.38 (5)
O6^i—Sr2—O3	103.37 (6)	Al1—O4—Al3	140.10 (9)
O6^i—Sr2—O3	103.37 (6)	Al1—O4—Al4	115.20 (9)
O6^i—Sr2—O3	76.63 (5)	Al1—O4—O5	155.40 (11)
O6^i—Sr2—O3	76.63 (5)	Al1—O4—O4	126.59 (7)
O6^i—Sr2—O6	118.72 (7)	Al1—O4—O1^ii	99.91 (7)
O6^i—Sr2—O6	61.28 (7)	Al1—O4—O4	90.67 (8)
O6—Sr2—O3	76.63 (6)	Al1—O4—O5^i	146.98 (10)
O6—Sr2—O3	76.63 (6)	Al1—O4—O1	107.50 (7)
O6—Sr2—O3	103.37 (5)	Al1—O4—O5	76.88 (6)
O6—Sr2—O3	103.37 (5)	Al1—O4—Sr1^i	101.63 (6)
O6—Sr2—O6	61.28 (7)	Al3—O4—Al4	96.43 (6)
O6—Sr2—O6	118.72 (7)	Al3—O4—O5	49.53 (6)
O3—Sr2—O3	75.78 (5)	Al3—O4—O4	92.75 (7)
O3—Sr2—O3	104.22 (5)	Al3—O4—O1^ii	45.73 (5)
O3—Sr2—O3	180.0000	Al3—O4—O4	96.31 (6)
O3—Sr2—O6	123.41 (4)	Al3—O4—O2	152.06 (9)
O3—Sr2—O6	56.59 (4)	Al3—O4—O5^i	43.78 (5)
O3—Sr2—O3	180.0000	Al3—O4—O3	103.00 (7)
O3—Sr2—O3	104.22 (5)	Al3—O4—O1	44.01 (5)
O3—Sr2—O6	123.41 (5)	Al3—O4—O5	136.87 (8)
O3—Sr2—O6	56.59 (4)	Al3—O4—Sr1^i	90.83 (6)
O3—Sr2—O3	75.78 (5)	Al3—O4—O1	137.07 (8)
O3—Sr2—O6	56.59 (4)	Al4—O4—O5	47.05 (5)
O3—Sr2—O6	123.41 (4)	Al4—O4—O4	45.54 (5)
O3—Sr2—O6	56.59 (4)	Al4—O4—O1^ii	142.15 (7)
O3—Sr2—O6	123.41 (4)	Al4—O4—O4	44.46 (5)
O6—Sr2—O6	180.0000	Al4—O4—O2	107.97 (7)
O4—Al1^i—O2^i	106.76 (8)	Al4—O4—O5^i	92.38 (6)
O4—Al1^i—O3	106.23 (8)	Al4—O4—O3	143.18 (9)
O4—Al1^i—O1^i	116.10 (8)	Al4—O4—O1	93.01 (6)
O4—Al1^i—O5^i	68.51 (7)	Al4—O4—Sr1^i	107.02 (6)
O2^i—Al1^i—O3	117.52 (8)	Al4—O4—O1	87.74 (7)
O2^i—Al1^i—O1^i	108.66 (8)	O5—O4—O4	57.47 (5)
O2^i—Al1^i—O5^i	80.89 (7)	O5—O4—O1^ii	95.13 (7)
O3—Al1^i—O1^i	101.96 (8)	O5—O4—O4	64.73 (7)
O3—Al1^i—O5^i	161.33 (7)	O5—O4—O2	150.73 (7)
O1^i—Al1^i—O5^i	66.91 (6)	O5—O4—O5^i	57.60 (7)
O4—Si1^i—O2^i	106.76 (8)	O5—O4—O3	143.49 (6)
O4—Si1^i—O3	106.23 (8)	O5—O4—O1	63.19 (5)
O4—Si1^i—O1^i	116.10 (8)	O5—O4—O5	87.64 (7)
O4—Si1^i—O5^i	68.51 (7)	O5—O4—Sr1^i	100.54 (7)
O2^i—Si1^i—O3	117.52 (8)	O5—O4—O1	122.97 (9)
O2^i—Si1^i—O1^i	108.66 (8)	O4—O4—O1^ii	121.63 (8)
O2^i—Si1^i—O5^i	80.89 (7)	O4—O4—O4	90.00 (7)
O3—Si1^i—O1^i	101.96 (8)	O4—O4—O2	94.73 (6)
O3—Si1^i—O5^i	161.33 (7)	O4—O4—O5^i	60.94 (5)
O1^i—Si1^i—O5^i	66.91 (6)	O4—O4—O3	158.95 (7)
O2—Al2—O6	108.44 (10)	O4—O4—O1	120.66 (6)
O2—Al2—O3	107.15 (8)	O4—O4—O5	61.45 (5)
O2—Al2—O1^i	110.13 (9)	O4—O4—Sr1^i	61.67 (5)
O6—Al2—O3	107.35 (10)	O4—O4—O1	118.66 (7)
O6—Al2—O1^i	109.73 (8)	O1^ii—O4—O4	126.27 (7)
O3—Al2—O1^i	113.87 (8)	O1^ii—O4—O2	108.67 (7)
O2—Si2—O6	108.44 (10)	O1^ii—O4—O5^i	60.99 (5)
O2—Si2—O3	107.15 (8)	O1^ii—O4—O3	64.47 (6)
O2—Si2—O1^i	110.13 (9)	O1^ii—O4—O1	61.81 (6)
O6—Si2—O3	107.35 (10)	O1^ii—O4—O5	176.70 (7)
O6—Si2—O1^i	109.73 (8)	O1^ii—O4—Sr1^i	77.59 (6)
O3—Si2—O1^i	113.87 (8)	O1^ii—O4—O1	119.32 (7)
O4—Al3^i—O4	174.50 (8)	O4—O4—O2	110.56 (7)
O4—Al3^i—O5^i	82.31 (7)	O4—O4—O5^i	122.32 (7)
O4—Al3^i—O5	93.56 (8)	O4—O4—O3	101.88 (7)
O4—Al3^i—O1	90.22 (6)	O4—O4—O1	64.75 (6)
O4—Al3^i—O1^i	93.56 (7)	O4—O4—O5	53.49 (6)
O4—Al3^i—O5^i	93.56 (8)	O4—O4—Sr1^i	151.13 (7)
O4—Al3^i—O5	82.31 (7)	O4—O4—O1	58.28 (5)
O4—Al3^i—O1	93.56 (7)	O2—O4—O5^i	119.82 (8)
O4—Al3^i—O1^i	90.22 (7)	O2—O4—O3	64.92 (5)
O5^i—Al3^i—O5	83.23 (8)	O2—O4—O1	143.55 (7)
O5^i—Al3^i—O1	170.94 (7)	O2—O4—O5	69.25 (6)
O5^i—Al3^i—O1^i	92.18 (7)	O2—O4—Sr1^i	69.45 (5)
O5—Al3^i—O1	92.18 (7)	O2—O4—O1	59.32 (5)
O5—Al3^i—O1^i	170.94 (6)	O5^i—O4—O3	123.15 (8)
O1—Al3^i—O1^i	93.40 (8)	O5^i—O4—O1	87.66 (6)
O5—Al4—O5	180.0000	O5^i—O4—O5	122.20 (6)
O5—Al4—O4	96.75 (6)	O5^i—O4—Sr1^i	50.40 (5)
O5—Al4—O4	83.25 (6)	O5^i—O4—O1	179.12 (8)
O5—Al4—O4	83.25 (6)	O3—O4—O1	80.32 (6)
O5—Al4—O4	96.75 (6)	O3—O4—O5	112.23 (7)
O5—Al4—O4	83.25 (6)	O3—O4—Sr1^i	103.69 (6)
O5—Al4—O4	96.75 (6)	O3—O4—O1	56.90 (6)
O5—Al4—O4	96.75 (6)	O1—O4—O5	118.20 (8)
O5—Al4—O4	83.25 (6)	O1—O4—Sr1^i	132.98 (7)
O4—Al4—O4	91.09 (7)	O1—O4—O1	93.21 (6)
O4—Al4—O4	180.0000	O5—O4—Sr1^i	103.70 (6)
O4—Al4—O4	88.91 (7)	O5—O4—O1	57.48 (5)
O4—Al4—O4	88.91 (7)	Sr1^i—O4—O1	128.74 (5)
O4—Al4—O4	180.0000	Al4^i—O5^i—Al3^i	97.70 (6)
O4—Al4—O4	91.09 (7)	Al4^i—O5^i—Al3	97.70 (6)
Si2—O1^i—Al2	0.00 (10)	Al4^i—O5^i—Sr1^i	145.72 (12)
Si2—O1^i—Si1^i	111.14 (9)	Al4^i—O5^i—O4	49.69 (5)
Si2—O1^i—Al1^i	111.14 (9)	Al4^i—O5^i—O4	49.69 (5)
Si2—O1^i—Al3^i	129.13 (10)	Al4^i—O5^i—O5	101.64 (9)
Si2—O1^i—O4	90.73 (7)	Al4^i—O5^i—O4	140.36 (7)
Si2—O1^i—O3	86.49 (7)	Al4^i—O5^i—O4	140.36 (7)
Si2—O1^i—O5^i	142.36 (8)	Al4^i—O5^i—O1^ii	94.88 (5)
Si2—O1^i—O4	155.99 (9)	Al4^i—O5^i—O1^i	94.88 (5)
Si2—O1^i—O1	100.38 (8)	Al4^i—O5^i—O4	42.67 (5)
Si2—O1^i—O2^i	96.67 (7)	Al4^i—O5^i—O4	42.67 (5)
Si2—O1^i—O2	34.42 (5)	Al4^i—O5^i—Al1^ii	76.01 (6)
Si2—O1^i—O6	34.83 (5)	Al4^i—O5^i—Si1^i	76.01 (6)
Si2—O1^i—O3	32.88 (5)	Al4^i—O5^i—Al1^i	76.01 (6)
Si2—O1^i—O4	141.77 (9)	Al4^i—O5^i—O2^ii	95.64 (9)
Al2—O1^i—Si1^i	111.14 (9)	Al4^i—O5^i—O2^i	95.64 (9)
Al2—O1^i—Al1^i	111.14 (9)	Al3^i—O5^i—Al3	96.77 (10)
Al2—O1^i—Al3^i	129.13 (10)	Al3^i—O5^i—Sr1^i	104.81 (7)
Al2—O1^i—O4	90.73 (7)	Al3^i—O5^i—O4	97.88 (8)
Al2—O1^i—O3	86.49 (7)	Al3^i—O5^i—O4	48.16 (5)
Al2—O1^i—O5^i	142.36 (8)	Al3^i—O5^i—O5	48.38 (5)
Al2—O1^i—O4	155.99 (9)	Al3^i—O5^i—O4	42.66 (5)
Al2—O1^i—O1	100.38 (8)	Al3^i—O5^i—O4	89.48 (9)
Al2—O1^i—O2^i	96.67 (7)	Al3^i—O5^i—O1^ii	140.33 (11)
Al2—O1^i—O2	34.42 (5)	Al3^i—O5^i—O4	93.08 (5)
Al2—O1^i—O6	34.83 (5)	Al3^i—O5^i—O4	140.22 (8)
Al2—O1^i—O3	32.88 (5)	Al3^i—O5^i—Al1^ii	170.68 (8)
Al2—O1^i—O4	141.77 (9)	Al3^i—O5^i—Si1^i	77.54 (3)
Si1^i—O1^i—Al3^i	116.43 (8)	Al3^i—O5^i—Al1^i	77.54 (3)
Si1^i—O1^i—O4	130.71 (8)	Al3^i—O5^i—O2^ii	156.78 (7)
Si1^i—O1^i—O5^i	77.26 (7)	Al3^i—O5^i—O2^i	100.17 (5)
Si1^i—O1^i—O4	88.35 (7)	Al3—O5^i—Sr1^i	104.81 (7)
Si1^i—O1^i—O1	145.27 (7)	Al3—O5^i—O4	48.16 (5)
Si1^i—O1^i—O2	80.50 (7)	Al3—O5^i—O4	97.88 (8)
Si1^i—O1^i—O6	107.58 (9)	Al3—O5^i—O5	48.38 (5)
Si1^i—O1^i—O3	137.48 (8)	Al3—O5^i—O4	89.48 (9)
Al1^i—O1^i—Al3^i	116.43 (8)	Al3—O5^i—O4	42.66 (5)
Al1^i—O1^i—O4	130.71 (8)	Al3—O5^i—O1^ii	44.15 (4)
Al1^i—O1^i—O5^i	77.26 (7)	Al3—O5^i—O1^i	140.33 (11)
Al1^i—O1^i—O4	88.35 (7)	Al3—O5^i—O4	140.22 (8)
Al1^i—O1^i—O1	145.27 (7)	Al3—O5^i—O4	93.08 (5)
Al1^i—O1^i—O2	80.50 (7)	Al3—O5^i—Al1^ii	77.54 (3)
Al1^i—O1^i—O6	107.58 (9)	Al3—O5^i—Si1^i	170.68 (8)
Al1^i—O1^i—O3	137.48 (8)	Al3—O5^i—Al1^i	170.68 (8)
Al3^i—O1^i—O3	143.44 (7)	Al3—O5^i—O2^ii	100.17 (4)
Al3^i—O1^i—O1	43.30 (5)	Al3—O5^i—O2^i	156.78 (7)
Al3^i—O1^i—O2^i	111.83 (7)	Sr1^i—O5^i—O4	147.04 (4)
Al3^i—O1^i—O2	143.21 (8)	Sr1^i—O5^i—O4	147.04 (4)
Al3^i—O1^i—O6	132.57 (9)	Sr1^i—O5^i—O5	112.63 (9)
Al3^i—O1^i—O3	96.57 (7)	Sr1^i—O5^i—O4	66.21 (5)
Al3^i—O1^i—O4	88.45 (6)	Sr1^i—O5^i—O4	66.21 (5)
O4—O1^i—O3	165.17 (7)	Sr1^i—O5^i—O1^ii	84.10 (4)
O4—O1^i—O5^i	60.67 (6)	Sr1^i—O5^i—O1^i	84.10 (4)
O4—O1^i—O4	86.42 (6)	Sr1^i—O5^i—O4	109.69 (8)
O4—O1^i—O1	60.44 (6)	Sr1^i—O5^i—O4	109.69 (8)
O4—O1^i—O2^i	101.49 (6)	Sr1^i—O5^i—Al1^ii	83.92 (5)
O4—O1^i—O2	99.63 (6)	Sr1^i—O5^i—Si1^i	83.92 (5)
O4—O1^i—O6	114.30 (8)	Sr1^i—O5^i—Al1^i	83.92 (5)
O4—O1^i—O3	58.98 (5)	Sr1^i—O5^i—O2^ii	55.47 (5)
O4—O1^i—O4	119.32 (6)	Sr1^i—O5^i—O2^i	55.47 (5)
O3—O1^i—O5^i	114.65 (8)	O4—O5^i—O4	65.07 (6)
O3—O1^i—O4	101.91 (7)	O4—O5^i—O5	66.49 (7)
O3—O1^i—O1	134.39 (7)	O4—O5^i—O4	122.40 (10)
O3—O1^i—O2^i	64.46 (6)	O4—O5^i—O4	90.77 (7)
O3—O1^i—O2	70.22 (6)	O4—O5^i—O1^ii	63.33 (4)
O3—O1^i—O6	70.40 (7)	O4—O5^i—O1^i	128.40 (7)
O3—O1^i—O3	119.37 (7)	O4—O5^i—O4	92.36 (8)
O3—O1^i—O4	58.24 (6)	O4—O5^i—O4	61.78 (6)
O5^i—O1^i—O4	53.47 (5)	O4—O5^i—Al1^ii	72.82 (5)
O5^i—O1^i—O1	86.77 (7)	O4—O5^i—Si1^i	124.72 (8)
O5^i—O1^i—O2^i	68.71 (6)	O4—O5^i—Al1^i	124.72 (8)
O5^i—O1^i—O2	121.55 (7)	O4—O5^i—O2^ii	105.24 (6)
O5^i—O1^i—O6	174.91 (10)	O4—O5^i—O2^i	142.83 (10)
O5^i—O1^i—O3	117.59 (8)	O4—O5^i—O5	66.49 (7)
O5^i—O1^i—O4	58.67 (6)	O4—O5^i—O4	90.77 (7)
O4—O1^i—O1	57.75 (6)	O4—O5^i—O4	122.40 (10)
O4—O1^i—O2^i	107.27 (7)	O4—O5^i—O1^ii	128.40 (7)
O4—O1^i—O2	168.74 (9)	O4—O5^i—O1^i	63.33 (4)
O4—O1^i—O6	127.30 (7)	O4—O5^i—O4	61.78 (6)
O4—O1^i—O3	133.35 (8)	O4—O5^i—O4	92.36 (8)
O4—O1^i—O4	56.98 (5)	O4—O5^i—Al1^ii	124.72 (8)
O1—O1^i—O2^i	155.05 (7)	O4—O5^i—Si1^i	72.82 (5)
O1—O1^i—O2	133.51 (8)	O4—O5^i—Al1^i	72.82 (5)
O1—O1^i—O6	89.90 (7)	O4—O5^i—O2^ii	142.83 (10)
O1—O1^i—O3	77.23 (6)	O4—O5^i—O2^i	105.24 (6)
O1—O1^i—O4	114.50 (6)	O5—O5^i—O4	55.91 (6)
O2^i—O1^i—O2	62.36 (6)	O5—O5^i—O4	55.91 (6)
O2^i—O1^i—O6	114.23 (8)	O5—O5^i—O1^ii	92.25 (6)
O2^i—O1^i—O3	109.47 (6)	O5—O5^i—O1^i	92.25 (6)
O2^i—O1^i—O4	56.88 (5)	O5—O5^i—O4	128.25 (7)
O2—O1^i—O6	58.73 (6)	O5—O5^i—O4	128.25 (7)
O2—O1^i—O3	57.48 (6)	O5—O5^i—Al1^ii	125.48 (4)
O2—O1^i—O4	111.81 (7)	O5—O5^i—Si1^i	125.48 (4)
O6—O1^i—O3	57.81 (6)	O5—O5^i—Al1^i	125.48 (4)
O6—O1^i—O4	126.35 (8)	O5—O5^i—O2^ii	145.57 (6)
O3—O1^i—O4	166.29 (7)	O5—O5^i—O2^i	145.57 (6)
Al2^i—O2^i—Si1^i	143.47 (12)	O4—O5^i—O4	58.12 (6)
Al2^i—O2^i—Al1^i	143.47 (12)	O4—O5^i—O1^ii	116.20 (8)
Al2^i—O2^i—Sr1^i	108.65 (7)	O4—O5^i—O1^i	58.35 (5)
Al2^i—O2^i—O4	135.35 (10)	O4—O5^i—O4	122.20 (4)
Al2^i—O2^i—O1^i	152.85 (9)	O4—O5^i—O4	175.65 (9)
Al2^i—O2^i—O2	94.10 (7)	O4—O5^i—Al1^ii	143.26 (7)
Al2^i—O2^i—O3	112.89 (9)	O4—O5^i—Si1^i	91.15 (4)
Al2^i—O2^i—O2^ii	88.75 (7)	O4—O5^i—Al1^i	91.15 (4)
Al2^i—O2^i—O5^i	147.78 (8)	O4—O5^i—O2^ii	121.48 (7)
Al2^i—O2^i—Sr1	82.44 (7)	O4—O5^i—O2^i	92.29 (6)
Al2^i—O2^i—O3	72.84 (6)	O4—O5^i—O1^ii	58.35 (5)
Si1^i—O2^i—Sr1^i	107.41 (8)	O4—O5^i—O1^i	116.20 (8)
Si1^i—O2^i—O4	36.57 (5)	O4—O5^i—O4	175.65 (9)
Si1^i—O2^i—O3^i	112.91 (9)	O4—O5^i—O4	122.20 (4)
Si1^i—O2^i—O6^i	168.18 (10)	O4—O5^i—Al1^ii	91.15 (4)
Si1^i—O2^i—O1	126.47 (8)	O4—O5^i—Si1^i	143.26 (6)
Si1^i—O2^i—O2	78.22 (7)	O4—O5^i—Al1^i	143.26 (6)
Si1^i—O2^i—O3	31.57 (5)	O4—O5^i—O2^ii	92.29 (6)
Si1^i—O2^i—O2^ii	117.54 (7)	O4—O5^i—O2^i	121.48 (7)
Si1^i—O2^i—O5^i	66.65 (6)	O1^ii—O5^i—O1^i	168.21 (8)
Si1^i—O2^i—Sr1	89.05 (6)	O1^ii—O5^i—O4	120.68 (8)
Si1^i—O2^i—O3	127.05 (9)	O1^ii—O5^i—O4	63.85 (5)
Al1^i—O2^i—Sr1^i	107.41 (8)	O1^ii—O5^i—Si1^i	142.12 (9)
Al1^i—O2^i—O4	36.57 (5)	O1^ii—O5^i—Al1^i	142.12 (9)
Al1^i—O2^i—O3^i	112.91 (9)	O1^ii—O5^i—O2^ii	56.50 (5)
Al1^i—O2^i—O6^i	168.18 (10)	O1^ii—O5^i—O2^i	115.84 (7)
Al1^i—O2^i—O1	126.47 (8)	O1^i—O5^i—O4	63.85 (5)
Al1^i—O2^i—O2	78.22 (7)	O1^i—O5^i—O4	120.68 (8)
Al1^i—O2^i—O3	31.57 (5)	O1^i—O5^i—Al1^ii	142.12 (9)
Al1^i—O2^i—O2^ii	117.54 (7)	O1^i—O5^i—O2^ii	115.84 (7)
Al1^i—O2^i—O5^i	66.65 (6)	O1^i—O5^i—O2^i	56.50 (5)
Al1^i—O2^i—Sr1	89.05 (6)	O4—O5^i—O4	57.11 (6)
Al1^i—O2^i—O3	127.05 (9)	O4—O5^i—Al1^ii	86.89 (7)
Sr1^i—O2^i—O4	103.14 (6)	O4—O5^i—Si1^i	34.61 (4)
Sr1^i—O2^i—O3^i	136.15 (7)	O4—O5^i—Al1^i	34.61 (4)
Sr1^i—O2^i—O6^i	76.94 (6)	O4—O5^i—O2^ii	83.98 (7)
Sr1^i—O2^i—O1^i	78.03 (6)	O4—O5^i—O2^i	54.58 (5)
Sr1^i—O2^i—O1	105.42 (6)	O4—O5^i—Al1^ii	34.61 (4)
Sr1^i—O2^i—O2	93.26 (7)	O4—O5^i—Si1^i	86.89 (7)
Sr1^i—O2^i—O3	134.18 (7)	O4—O5^i—Al1^i	86.89 (7)
Sr1^i—O2^i—O2^ii	53.99 (5)	O4—O5^i—O2^ii	54.58 (5)
Sr1^i—O2^i—Sr1	112.66 (5)	O4—O5^i—O2^i	83.98 (7)
Sr1^i—O2^i—O3	53.58 (4)	Al1^ii—O5^i—Si1^i	107.08 (8)
O4—O2^i—O3^i	99.13 (7)	Al1^ii—O5^i—Al1^i	107.08 (8)
O4—O2^i—O6^i	132.25 (8)	Al1^ii—O5^i—O2^i	87.42 (7)
O4—O2^i—O1^i	63.80 (5)	Al1^i—O5^i—O2^ii	87.42 (7)
O4—O2^i—O1	150.98 (8)	O2^ii—O5^i—O2^i	59.54 (6)
O4—O2^i—O2	114.77 (7)	Al2—O6—Si2	125.45 (12)
O4—O2^i—O3	57.81 (5)	Al2—O6—Al2	125.45 (12)
O4—O2^i—O2^ii	85.27 (5)	Al2—O6—Sr2^i	115.31 (7)
O4—O2^i—O5^i	56.17 (6)	Al2—O6—O2	100.91 (9)
O4—O2^i—Sr1	56.36 (5)	Al2—O6—O2	35.56 (6)
O4—O2^i—O3	151.31 (8)	Al2—O6—O3	103.89 (10)
O3^i—O2^i—O6^i	60.25 (7)	Al2—O6—O3	36.43 (6)
O3^i—O2^i—O1^i	145.76 (8)	Al2—O6—O1	35.44 (4)
O3^i—O2^i—O1	62.81 (6)	Al2—O6—O1^i	160.39 (10)
O3^i—O2^i—O2	110.87 (7)	Al2—O6—O6	107.55 (9)
O3^i—O2^i—O3	89.60 (7)	Al2—O6—Sr2	86.52 (9)
O3^i—O2^i—O2^ii	91.39 (7)	Al2—O6—O3	127.01 (12)
O3^i—O2^i—O5^i	141.39 (7)	Al2—O6—O3	72.33 (7)
O3^i—O2^i—Sr1	53.20 (4)	Si2—O6—Al2	0.00 (7)
O3^i—O2^i—O3	109.43 (6)	Si2—O6—Sr2^i	115.31 (7)
O6^i—O2^i—O1^i	153.07 (9)	Si2—O6—O2	35.56 (6)
O6^i—O2^i—O1	60.78 (5)	Si2—O6—O2	100.91 (9)
O6^i—O2^i—O2	112.87 (6)	Si2—O6—O3	36.43 (6)
O6^i—O2^i—O3	148.04 (9)	Si2—O6—O3	103.89 (10)
O6^i—O2^i—O2^ii	55.66 (4)	Si2—O6—O1	160.39 (10)
O6^i—O2^i—O5^i	111.91 (7)	Si2—O6—O1^i	35.44 (4)
O6^i—O2^i—Sr1	79.15 (6)	Si2—O6—O6	107.55 (9)
O6^i—O2^i—O3	64.52 (6)	Si2—O6—Sr2	86.52 (9)
O1^i—O2^i—O1	117.64 (7)	Si2—O6—O3	72.33 (7)
O1^i—O2^i—O2	58.89 (5)	Si2—O6—O3	127.01 (12)
O1^i—O2^i—O3	56.16 (5)	Al2—O6—Sr2^i	115.31 (7)
O1^i—O2^i—O2^ii	114.83 (7)	Al2—O6—O2	35.56 (6)
O1^i—O2^i—O5^i	54.79 (5)	Al2—O6—O2	100.91 (9)
O1^i—O2^i—Sr1	120.12 (5)	Al2—O6—O3	36.43 (6)
O1^i—O2^i—O3	92.45 (7)	Al2—O6—O3	103.89 (10)
O1—O2^i—O2	58.75 (5)	Al2—O6—O1	160.39 (10)
O1—O2^i—O3	97.53 (6)	Al2—O6—O1^i	35.44 (4)
O1—O2^i—O2^ii	115.92 (6)	Al2—O6—O6	107.55 (9)
O1—O2^i—O5^i	150.94 (8)	Al2—O6—Sr2	86.52 (9)
O1—O2^i—Sr1	115.21 (7)	Al2—O6—O3	72.33 (7)
O1—O2^i—O3	53.39 (5)	Al2—O6—O3	127.01 (12)
O2—O2^i—O3	65.75 (5)	Sr2^i—O6—O2	117.86 (9)
O2—O2^i—O2^ii	145.86 (8)	Sr2^i—O6—O2	117.86 (9)
O2—O2^i—O5^i	106.76 (7)	Sr2^i—O6—O3	139.78 (5)
O2—O2^i—Sr1	153.64 (7)	Sr2^i—O6—O3	139.78 (5)
O2—O2^i—O3	57.65 (5)	Sr2^i—O6—O1	81.23 (5)
O3—O2^i—O2^ii	142.69 (6)	Sr2^i—O6—O1^i	81.23 (5)
O3—O2^i—O5^i	98.17 (5)	Sr2^i—O6—O6	69.98 (7)
O3—O2^i—Sr1	91.43 (5)	Sr2^i—O6—Sr2	118.72 (8)
O3—O2^i—O3	123.40 (7)	Sr2^i—O6—O3	53.79 (5)
O2^ii—O2^i—O5^i	60.23 (5)	Sr2^i—O6—O3	53.79 (5)
O2^ii—O2^i—Sr1	60.43 (4)	O2—O6—O2	68.68 (7)
O2^ii—O2^i—O3	91.20 (6)	O2—O6—O3	59.59 (6)
O5^i—O2^i—Sr1	88.67 (5)	O2—O6—O3	99.03 (7)
O5^i—O2^i—O3	97.61 (7)	O2—O6—O1	128.49 (8)
Sr1—O2^i—O3	142.87 (6)	O2—O6—O1^i	60.49 (5)
Al2—O3—Al1	120.08 (10)	O2—O6—O6	143.09 (6)
Al2—O3—Sr2	103.07 (6)	O2—O6—Sr2	111.87 (7)
Al2—O3—Sr1^i	98.46 (7)	O2—O6—O3	64.07 (6)
Al2—O3—O1	152.63 (8)	O2—O6—O3	97.89 (9)
Al2—O3—O2	36.09 (5)	O2—O6—O3	99.03 (7)
Al2—O3—O4	88.70 (7)	O2—O6—O3	59.59 (6)
Al2—O3—O6	36.23 (5)	O2—O6—O1	60.49 (5)
Al2—O3—O1	33.26 (5)	O2—O6—O1^i	128.49 (8)
Al2—O3—O2	113.20 (8)	O2—O6—O6	143.09 (6)
Al2—O3—O2^i	145.24 (8)	O2—O6—Sr2	111.87 (7)
Al2—O3—O6^i	144.59 (8)	O2—O6—O3	97.89 (9)
Al2—O3—O3	86.55 (7)	O2—O6—O3	64.07 (6)
Al1—O3—Sr2	114.72 (8)	O3—O6—O3	71.99 (7)
Al1—O3—Sr1^i	118.33 (7)	O3—O6—O1	134.40 (9)
Al1—O3—O1	39.19 (6)	O3—O6—O1^i	62.49 (5)
Al1—O3—O2	113.19 (8)	O3—O6—O6	90.57 (8)
Al1—O3—O4	36.43 (5)	O3—O6—Sr2	53.02 (6)
Al1—O3—O6	150.18 (8)	O3—O6—O3	108.61 (5)
Al1—O3—O1	91.28 (7)	O3—O6—O3	156.61 (9)
Al1—O3—O2	30.91 (4)	O3—O6—O1	62.49 (5)
Al1—O3—O2^i	70.05 (6)	O3—O6—O1^i	134.40 (9)
Al1—O3—O6^i	94.18 (8)	O3—O6—O6	90.57 (8)
Al1—O3—O3	153.35 (10)	O3—O6—Sr2	53.02 (6)
Sr2—O3—Sr1^i	98.72 (5)	O3—O6—O3	156.61 (9)
Sr2—O3—O1	80.74 (6)	O3—O6—O3	108.61 (5)
Sr2—O3—O2	129.49 (7)	O1—O6—O1^i	162.44 (9)
Sr2—O3—O4	109.47 (6)	O1—O6—O6	87.51 (5)
Sr2—O3—O6	70.39 (6)	O1—O6—Sr2	94.67 (6)
Sr2—O3—O1	104.08 (5)	O1—O6—O3	114.05 (9)
Sr2—O3—O2	140.07 (8)	O1—O6—O3	53.19 (5)
Sr2—O3—O2^i	100.99 (6)	O1^i—O6—O6	87.51 (5)
Sr2—O3—O6^i	49.58 (4)	O1^i—O6—Sr2	94.67 (6)
Sr2—O3—O3	52.11 (4)	O1^i—O6—O3	53.19 (5)
Sr1^i—O3—O1	107.82 (6)	O1^i—O6—O3	114.05 (9)
Sr1^i—O3—O2	71.33 (5)	O6—O6—Sr2	48.74 (6)
Sr1^i—O3—O4	148.55 (6)	O6—O6—O3	112.69 (7)
Sr1^i—O3—O6	88.25 (6)	O6—O6—O3	112.69 (7)
Sr1^i—O3—O1	129.95 (8)	Sr2—O6—O3	146.37 (5)
Sr1^i—O3—O2	92.10 (5)	Sr2—O6—O3	146.37 (5)
Sr1^i—O3—O2^i	53.05 (4)	O3—O6—O3	61.24 (6)
Sr1^i—O3—O6^i	69.54 (5)

Symmetry codes: (i) x+1/2, y+1/2, z; (ii) x+1/2, −y+1/2, z; (iii) −x+1/2, y+1/2, −z.