Tetra­caesium strontium catena-nona­selenidotristannate(IV)

Van Almsick, T.; Sheldrick, W.S.

doi:10.1107/S1600536805031090

Tetracaesium strontium catena-nonaselenidotristannate(IV)

The title compound, Cs₄SrSn₃Se₉, contains infinite `dreier' [SnSe₃]^2- chains consisting of corner-linked SnSe₄ tetrahedra. Whereas the larger independent caesium cations exhibit coordination numbers of 8 and 9, a distorted octahedral environment is observed for the smaller strontium cation.

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Supporting information

	Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536805031090/wm6093sup1.cif Contains datablocks I, global
	Structure factor file (CIF format) https://doi.org/10.1107/S1600536805031090/wm6093Isup2.hkl Contains datablock I

checkCIF report

Key indicators

Single-crystal X-ray study
T = 293 K
Mean (n-Se) = 0.003 Å
R factor = 0.036
wR factor = 0.101
Data-to-parameter ratio = 15.2

checkCIF/PLATON results

No syntax errors found



Alert level C
PLAT199_ALERT_1_C Check the Reported _cell_measurement_temperature        293 K
PLAT200_ALERT_1_C Check the Reported _diffrn_ambient_temperature .        293 K
PLAT710_ALERT_4_C Delete 1-2-3 or 2-3-4 Linear Torsion Angle ... #        136
            SE2 -CS2 -SE3 -SN    105.60  0.30   4.454   1.555   1.555   1.555
PLAT710_ALERT_4_C Delete 1-2-3 or 2-3-4 Linear Torsion Angle ... #        144
            SE2 -CS2 -SE3 -SR   -143.90  0.30   4.454   1.555   1.555   7.545
PLAT710_ALERT_4_C Delete 1-2-3 or 2-3-4 Linear Torsion Angle ... #        152
            SE2 -CS2 -SE3 -CS1     1.00  0.30   4.454   1.555   1.555   3.665
PLAT710_ALERT_4_C Delete 1-2-3 or 2-3-4 Linear Torsion Angle ... #        162
            SE2 -CS2 -SE3 -CS1    14.90  0.30   4.454   1.555   1.555   4.445
PLAT710_ALERT_4_C Delete 1-2-3 or 2-3-4 Linear Torsion Angle ... #        170
            SE2 -CS2 -SE3 -CS1  -171.80  0.30   4.454   1.555   1.555   8.645
PLAT733_ALERT_1_C Torsion Calc   62.01(11), Rep    62.02(3) ......       3.67 su-Rat
              SE1 -SN  -SE1 -SN     6.665   1.555   1.555   8.644
PLAT733_ALERT_1_C Torsion Calc    38.19(5), Rep    38.19(2) ......       2.78 su-Rat
              SE3 -CS2 -SE3 -SR     2.655   1.555   1.555   7.545
PLAT733_ALERT_1_C Torsion Calc   -38.19(5), Rep   -38.19(2) ......       2.78 su-Rat
              SE3 -CS2 -SE3 -SR     3.665   1.555   1.555   7.545

Alert level G
REFLT03_ALERT_4_G  WARNING: Large fraction of Friedel related reflns may
                     be needed to determine absolute structure
           From the CIF: _diffrn_reflns_theta_max           24.99
           From the CIF: _reflns_number_total                792
           Count of symmetry unique reflns          701
           Completeness (_total/calc)            112.98%
           TEST3: Check Friedels for noncentro structure
           Estimate of Friedel pairs measured        91
           Fraction of Friedel pairs measured     0.130
           Are heavy atom types Z>Si present        yes

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

   5 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
   0 ALERT type 3 Indicator that the structure quality may be low
   6 ALERT type 4 Improvement, methodology, query or suggestion

Computing details top

Data collection: Siemens R3m/V (Siemens, 1989); cell refinement: Siemens R3m/V; data reduction: XDISK (Siemens, 1989); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: XP in SHELXTL-Plus (Sheldrick, 1995); software used to prepare material for publication: SHELXL97.

Tetracesium strontium catena-nonaselenidotristannate(IV) top

Crystal data top

Cs₄SrSn₃Se₉	D_x = 4.744 Mg m⁻³
M_r = 1685.97	Mo Kα radiation, λ = 0.71073 Å
Trigonal, R3	Cell parameters from 21 reflections
Hall symbol: R 3	θ = 4.4–18.5°
a = 14.528 (3) Å	µ = 25.32 mm⁻¹
c = 9.685 (4) Å	T = 293 K
V = 1770.4 (9) Å³	Prism, black
Z = 3	0.11 × 0.10 × 0.09 mm
F(000) = 2142

Data collection top

Siemens P4 four-circle diffractometer	782 reflections with I > 2σ(I)
Radiation source: fine-focus sealed tube	R_int = 0.044
Graphite monochromator	θ_max = 25.0°, θ_min = 2.8°
ω scans	h = −1→16
Absorption correction: ψ scan (XPREP in SHELXTL-Plus; Sheldrick, 1995)	k = −17→1
T_min = 0.075, T_max = 0.098	l = −1→11
945 measured reflections	3 standard reflections every 97 reflections
792 independent reflections	intensity decay: 0.1%

Refinement top

Refinement on F²	Primary atom site location: structure-invariant direct methods
Least-squares matrix: full	Secondary atom site location: difference Fourier map
R[F² > 2σ(F²)] = 0.036	w = 1/[σ²(F_o²) + (0.0779P)²] where P = (F_o² + 2F_c²)/3
wR(F²) = 0.102	(Δ/σ)_max < 0.001
S = 1.15	Δρ_max = 1.52 e Å⁻³
792 reflections	Δρ_min = −1.71 e Å⁻³
52 parameters	Absolute structure: Flack (1983), 111 Friedel pairs
1 restraint	Absolute structure parameter: 0.02 (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
Cs1	1.00451 (10)	0.56109 (9)	0.17713 (13)	0.0314 (4)
Cs2	0.6667	0.3333	0.1886 (3)	0.0403 (6)
Sn	0.89143 (8)	0.23873 (9)	0.44014 (13)	0.0171 (3)
Se1	0.90254 (14)	0.26040 (15)	0.1782 (2)	0.0216 (4)
Se2	0.94565 (15)	0.11743 (14)	0.5419 (2)	0.0239 (4)
Se3	0.70045 (15)	0.17204 (15)	0.4813 (2)	0.0241 (5)
Sr	0.3333	0.6667	−0.0147 (3)	0.0203 (6)

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Cs1	0.0307 (6)	0.0301 (7)	0.0317 (8)	0.0138 (5)	0.0000 (5)	−0.0029 (5)
Cs2	0.0443 (9)	0.0443 (9)	0.0325 (13)	0.0221 (4)	0.000	0.000
Sn	0.0177 (6)	0.0174 (6)	0.0172 (6)	0.0095 (5)	0.0009 (4)	−0.0007 (4)
Se1	0.0160 (8)	0.0261 (9)	0.0177 (9)	0.0068 (7)	0.0000 (6)	−0.0010 (7)
Se2	0.0299 (10)	0.0221 (9)	0.0249 (9)	0.0170 (8)	−0.0034 (8)	−0.0008 (8)
Se3	0.0211 (9)	0.0239 (9)	0.0286 (10)	0.0123 (7)	0.0020 (7)	−0.0046 (8)
Sr	0.0194 (8)	0.0194 (8)	0.0221 (15)	0.0097 (4)	0.000	0.000

Geometric parameters (Å, º) top

Cs1—Se2ⁱ	3.661 (2)	Sn—Se1^v	2.571 (2)
Cs1—Se2ⁱⁱ	3.684 (2)	Sn—Cs1^xi	4.306 (2)
Cs1—Se3ⁱⁱⁱ	3.777 (2)	Sn—Cs1^v	4.3711 (18)
Cs1—Se2^iv	3.826 (2)	Sn—Cs1^xii	4.4405 (18)
Cs1—Se1^v	3.836 (3)	Se1—Snⁱ	2.571 (2)
Cs1—Se1	3.848 (2)	Se1—Cs1ⁱ	3.836 (3)
Cs1—Se3ⁱⁱ	3.849 (2)	Se2—Sr^xiii	3.091 (3)
Cs1—Se3^iv	3.894 (3)	Se2—Cs1^v	3.661 (2)
Cs1—Cs1^vi	4.2184 (18)	Se2—Cs1^xii	3.684 (2)
Cs1—Cs1^vii	4.2185 (18)	Se2—Cs2^xiv	3.754 (3)
Cs1—Sn^iv	4.306 (2)	Se2—Cs1^xi	3.826 (2)
Cs1—Cs2	4.3372 (15)	Se3—Sr^xiv	3.100 (2)
Cs2—Se2^iv	3.754 (3)	Se3—Cs1^x	3.777 (2)
Cs2—Se2^viii	3.754 (3)	Se3—Cs1^xii	3.849 (2)
Cs2—Se2^ix	3.754 (3)	Se3—Cs1^xi	3.894 (3)
Cs2—Se3	3.862 (3)	Sr—Se2^xv	3.091 (3)
Cs2—Se3ⁱⁱⁱ	3.862 (3)	Sr—Se2^xvi	3.091 (3)
Cs2—Se3^x	3.862 (3)	Sr—Se2^vi	3.091 (3)
Cs2—Se1	4.063 (2)	Sr—Se3^ix	3.100 (2)
Cs2—Se1^x	4.063 (2)	Sr—Se3^xvii	3.101 (2)
Cs2—Se1ⁱⁱⁱ	4.063 (2)	Sr—Se3^xviii	3.101 (2)
Cs2—Cs1^x	4.3372 (15)	Sr—Cs2^ix	4.488 (4)
Cs2—Cs1ⁱⁱⁱ	4.3372 (15)	Sr—Cs1^xix	4.615 (2)
Sn—Se2	2.467 (2)	Sr—Cs1^xx	4.615 (2)
Sn—Se3	2.472 (2)	Sr—Cs1ⁱⁱⁱ	4.615 (2)
Sn—Se1	2.551 (3)	Sr—Cs2^xxi	5.198 (5)

Se2ⁱ—Cs1—Se2ⁱⁱ	62.80 (6)	Se1^x—Cs2—Se1ⁱⁱⁱ	119.939 (4)
Se2ⁱ—Cs1—Se3ⁱⁱⁱ	120.54 (6)	Se2—Sn—Se3	110.63 (8)
Se2ⁱⁱ—Cs1—Se3ⁱⁱⁱ	114.49 (5)	Se2—Sn—Se1	117.54 (9)
Se2ⁱ—Cs1—Se2^iv	103.08 (6)	Se3—Sn—Se1	101.43 (8)
Se2ⁱⁱ—Cs1—Se2^iv	133.72 (6)	Se2—Sn—Se1^v	109.41 (8)
Se3ⁱⁱⁱ—Cs1—Se2^iv	110.38 (5)	Se3—Sn—Se1^v	118.02 (7)
Se2ⁱ—Cs1—Se1^v	61.28 (5)	Se1—Sn—Se1^v	99.60 (7)
Se2ⁱⁱ—Cs1—Se1^v	92.77 (5)	Sn—Se1—Snⁱ	107.45 (8)
Se3ⁱⁱⁱ—Cs1—Se1^v	59.57 (5)	Sn—Se1—Cs1ⁱ	141.88 (7)
Se2^iv—Cs1—Se1^v	119.93 (5)	Snⁱ—Se1—Cs1ⁱ	96.13 (7)
Se2ⁱ—Cs1—Se1	66.35 (4)	Sn—Se1—Cs1	96.18 (7)
Se2ⁱⁱ—Cs1—Se1	129.14 (5)	Snⁱ—Se1—Cs1	83.30 (5)
Se3ⁱⁱⁱ—Cs1—Se1	90.19 (5)	Cs1ⁱ—Se1—Cs1	116.38 (6)
Se2^iv—Cs1—Se1	59.77 (4)	Sn—Se1—Cs2	89.89 (7)
Se1^v—Cs1—Se1	61.22 (4)	Snⁱ—Se1—Cs2	146.75 (7)
Se2ⁱ—Cs1—Se3ⁱⁱ	127.86 (5)	Cs1ⁱ—Se1—Cs2	85.92 (5)
Se2ⁱⁱ—Cs1—Se3ⁱⁱ	65.20 (4)	Cs1—Se1—Cs2	66.43 (4)
Se3ⁱⁱⁱ—Cs1—Se3ⁱⁱ	84.33 (4)	Sn—Se2—Sr^xiii	112.06 (9)
Se2^iv—Cs1—Se3ⁱⁱ	109.69 (5)	Sn—Se2—Cs1^v	88.78 (6)
Se1^v—Cs1—Se3ⁱⁱ	125.67 (5)	Sr^xiii—Se2—Cs1^v	85.79 (5)
Se1—Cs1—Se3ⁱⁱ	165.47 (6)	Sn—Se2—Cs1^xii	90.19 (6)
Se2ⁱ—Cs1—Se3^iv	76.91 (5)	Sr^xiii—Se2—Cs1^xii	85.39 (5)
Se2ⁱⁱ—Cs1—Se3^iv	70.32 (5)	Cs1^v—Se2—Cs1^xii	170.01 (7)
Se3ⁱⁱⁱ—Cs1—Se3^iv	162.46 (5)	Sn—Se2—Cs2^xiv	149.60 (8)
Se2^iv—Cs1—Se3^iv	63.47 (5)	Sr^xiii—Se2—Cs2^xiv	98.33 (7)
Se1^v—Cs1—Se3^iv	137.97 (6)	Cs1^v—Se2—Cs2^xiv	93.14 (5)
Se1—Cs1—Se3^iv	99.44 (5)	Cs1^xii—Se2—Cs2^xiv	92.77 (5)
Se3ⁱⁱ—Cs1—Se3^iv	82.78 (4)	Sn—Se2—Cs1^xi	83.36 (6)
Se2^iv—Cs2—Se2^viii	61.28 (6)	Sr^xiii—Se2—Cs1^xi	149.94 (7)
Se2^iv—Cs2—Se2^ix	61.28 (6)	Cs1^v—Se2—Cs1^xi	121.38 (6)
Se2^viii—Cs2—Se2^ix	61.28 (6)	Cs1^xii—Se2—Cs1^xi	68.32 (5)
Se2^iv—Cs2—Se3	116.63 (4)	Cs2^xiv—Se2—Cs1^xi	69.80 (5)
Se2^viii—Cs2—Se3	110.09 (5)	Sn—Se3—Sr^xiv	111.14 (7)
Se2^ix—Cs2—Se3	171.30 (5)	Sn—Se3—Cs1^x	105.77 (7)
Se2^iv—Cs2—Se3ⁱⁱⁱ	110.09 (5)	Sr^xiv—Se3—Cs1^x	133.32 (7)
Se2^viii—Cs2—Se3ⁱⁱⁱ	171.30 (5)	Sn—Se3—Cs1^xii	86.37 (6)
Se2^ix—Cs2—Se3ⁱⁱⁱ	116.63 (4)	Sr^xiv—Se3—Cs1^xii	140.95 (8)
Se3—Cs2—Se3ⁱⁱⁱ	72.06 (6)	Cs1^x—Se3—Cs1^xii	67.16 (4)
Se2^iv—Cs2—Se3^x	171.30 (5)	Sn—Se3—Cs2	95.85 (6)
Se2^viii—Cs2—Se3^x	116.63 (4)	Sr^xiv—Se3—Cs2	79.43 (8)
Se2^ix—Cs2—Se3^x	110.09 (5)	Cs1^x—Se3—Cs2	69.17 (5)
Se3—Cs2—Se3^x	72.06 (6)	Cs1^xii—Se3—Cs2	135.12 (6)
Se3ⁱⁱⁱ—Cs2—Se3^x	72.06 (6)	Sn—Se3—Cs1^xi	81.85 (6)
Se2^iv—Cs2—Se1	58.41 (4)	Sr^xiv—Se3—Cs1^xi	81.72 (7)
Se2^viii—Cs2—Se1	88.21 (5)	Cs1^x—Se3—Cs1^xi	131.88 (6)
Se2^ix—Cs2—Se1	119.67 (7)	Cs1^xii—Se3—Cs1^xi	66.02 (4)
Se3—Cs2—Se1	58.69 (4)	Cs2—Se3—Cs1^xi	158.74 (6)
Se3ⁱⁱⁱ—Cs2—Se1	85.88 (4)	Se2^xv—Sr—Se2^xvi	76.47 (9)
Se3^x—Cs2—Se1	130.24 (7)	Se2^xv—Sr—Se2^vi	76.47 (9)
Se2^iv—Cs2—Se1^x	119.67 (7)	Se2^xvi—Sr—Se2^vi	76.47 (9)
Se2^viii—Cs2—Se1^x	58.41 (4)	Se2^xv—Sr—Se3^ix	166.06 (9)
Se2^ix—Cs2—Se1^x	88.21 (5)	Se2^xvi—Sr—Se3^ix	89.70 (5)
Se3—Cs2—Se1^x	85.88 (4)	Se2^vi—Sr—Se3^ix	98.82 (5)
Se3ⁱⁱⁱ—Cs2—Se1^x	130.24 (7)	Se2^xv—Sr—Se3^xvii	98.82 (5)
Se3^x—Cs2—Se1^x	58.69 (4)	Se2^xvi—Sr—Se3^xvii	166.06 (9)
Se1—Cs2—Se1^x	119.939 (4)	Se2^vi—Sr—Se3^xvii	89.70 (5)
Se2^iv—Cs2—Se1ⁱⁱⁱ	88.21 (5)	Se3^ix—Sr—Se3^xvii	94.23 (8)
Se2^viii—Cs2—Se1ⁱⁱⁱ	119.67 (7)	Se2^xv—Sr—Se3^xviii	89.70 (5)
Se2^ix—Cs2—Se1ⁱⁱⁱ	58.41 (4)	Se2^xvi—Sr—Se3^xviii	98.82 (5)
Se3—Cs2—Se1ⁱⁱⁱ	130.24 (7)	Se2^vi—Sr—Se3^xviii	166.06 (9)
Se3ⁱⁱⁱ—Cs2—Se1ⁱⁱⁱ	58.69 (4)	Se3^ix—Sr—Se3^xviii	94.23 (8)
Se3^x—Cs2—Se1ⁱⁱⁱ	85.88 (4)	Se3^xvii—Sr—Se3^xviii	94.23 (8)
Se1—Cs2—Se1ⁱⁱⁱ	119.939 (4)

Se2—Sn—Se1—Snⁱ	−55.91 (10)	Se3—Sn—Se2—Sr^xiii	110.99 (8)
Se3—Sn—Se1—Snⁱ	−176.63 (8)	Se1—Sn—Se2—Sr^xiii	−4.81 (11)
Se1^v—Sn—Se1—Snⁱ	62.02 (3)	Se1^v—Sn—Se2—Sr^xiii	−117.34 (8)
Cs1^xi—Sn—Se1—Snⁱ	−139.27 (17)	Cs1^xi—Sn—Se2—Sr^xiii	153.25 (8)
Cs1^v—Sn—Se1—Snⁱ	0.36 (7)	Cs1^v—Sn—Se2—Sr^xiii	−84.96 (7)
Cs1^xii—Sn—Se1—Snⁱ	−115.05 (7)	Cs1^xii—Sn—Se2—Sr^xiii	85.11 (7)
Se2—Sn—Se1—Cs1ⁱ	69.68 (15)	Se3—Sn—Se2—Cs1^v	−164.05 (7)
Se3—Sn—Se1—Cs1ⁱ	−51.04 (15)	Se1—Sn—Se2—Cs1^v	80.15 (8)
Se1^v—Sn—Se1—Cs1ⁱ	−172.39 (14)	Se1^v—Sn—Se2—Cs1^v	−32.38 (8)
Cs1^xi—Sn—Se1—Cs1ⁱ	−13.7 (3)	Cs1^xi—Sn—Se2—Cs1^v	−121.79 (6)
Cs1^v—Sn—Se1—Cs1ⁱ	125.95 (11)	Cs1^xii—Sn—Se2—Cs1^v	170.07 (7)
Cs1^xii—Sn—Se1—Cs1ⁱ	10.54 (14)	Se3—Sn—Se2—Cs1^xii	25.89 (8)
Se2—Sn—Se1—Cs1	−140.80 (7)	Se1—Sn—Se2—Cs1^xii	−89.91 (7)
Se3—Sn—Se1—Cs1	98.48 (6)	Se1^v—Sn—Se2—Cs1^xii	157.56 (6)
Se1^v—Sn—Se1—Cs1	−22.88 (6)	Cs1^xi—Sn—Se2—Cs1^xii	68.14 (4)
Cs1^xi—Sn—Se1—Cs1	135.83 (17)	Cs1^v—Sn—Se2—Cs1^xii	−170.07 (7)
Cs1^v—Sn—Se1—Cs1	−84.53 (4)	Se3—Sn—Se2—Cs2^xiv	−69.93 (16)
Cs1^xii—Sn—Se1—Cs1	160.06 (5)	Se1—Sn—Se2—Cs2^xiv	174.27 (12)
Se2—Sn—Se1—Cs2	152.93 (7)	Se1^v—Sn—Se2—Cs2^xiv	61.74 (16)
Se3—Sn—Se1—Cs2	32.21 (7)	Cs1^xi—Sn—Se2—Cs2^xiv	−27.67 (12)
Se1^v—Sn—Se1—Cs2	−89.15 (7)	Cs1^v—Sn—Se2—Cs2^xiv	94.12 (15)
Cs1^xi—Sn—Se1—Cs2	69.6 (2)	Cs1^xii—Sn—Se2—Cs2^xiv	−95.81 (15)
Cs1^v—Sn—Se1—Cs2	−150.80 (3)	Se3—Sn—Se2—Cs1^xi	−42.25 (8)
Cs1^xii—Sn—Se1—Cs2	93.78 (4)	Se1—Sn—Se2—Cs1^xi	−158.05 (7)
Se2ⁱ—Cs1—Se1—Sn	86.07 (7)	Se1^v—Sn—Se2—Cs1^xi	89.42 (7)
Se2ⁱⁱ—Cs1—Se1—Sn	84.96 (9)	Cs1^v—Sn—Se2—Cs1^xi	121.79 (6)
Se3ⁱⁱⁱ—Cs1—Se1—Sn	−37.52 (7)	Cs1^xii—Sn—Se2—Cs1^xi	−68.14 (4)
Se2^iv—Cs1—Se1—Sn	−151.18 (7)	Se2—Sn—Se3—Sr^xiv	119.33 (10)
Se1^v—Cs1—Se1—Sn	17.04 (4)	Se1—Sn—Se3—Sr^xiv	−115.21 (10)
Se3ⁱⁱ—Cs1—Se1—Sn	−105.1 (2)	Se1^v—Sn—Se3—Sr^xiv	−7.73 (13)
Se3^iv—Cs1—Se1—Sn	157.21 (7)	Cs1^xi—Sn—Se3—Sr^xiv	77.80 (8)
Sn^iv—Cs1—Se1—Sn	170.90 (6)	Cs1^v—Sn—Se3—Sr^xiv	74.0 (2)
Se2ⁱ—Cs1—Se1—Snⁱ	−20.84 (6)	Cs1^xii—Sn—Se3—Sr^xiv	144.08 (10)
Se2ⁱⁱ—Cs1—Se1—Snⁱ	−21.96 (10)	Se2—Sn—Se3—Cs1^x	−89.79 (9)
Se3ⁱⁱⁱ—Cs1—Se1—Snⁱ	−144.44 (6)	Se1—Sn—Se3—Cs1^x	35.67 (8)
Se2^iv—Cs1—Se1—Snⁱ	101.91 (7)	Se1^v—Sn—Se3—Cs1^x	143.15 (7)
Se1^v—Cs1—Se1—Snⁱ	−89.87 (7)	Se2—Sn—Se3—Cs1^xii	−24.75 (8)
Se3ⁱⁱ—Cs1—Se1—Snⁱ	148.0 (2)	Se1—Sn—Se3—Cs1^xii	100.71 (6)
Se3^iv—Cs1—Se1—Snⁱ	50.29 (7)	Se1^v—Sn—Se3—Cs1^xii	−151.81 (8)
Sn^iv—Cs1—Se1—Snⁱ	63.98 (5)	Se2—Sn—Se3—Cs2	−159.76 (7)
Se2ⁱ—Cs1—Se1—Cs1ⁱ	−114.39 (6)	Se1—Sn—Se3—Cs2	−34.30 (8)
Se2ⁱⁱ—Cs1—Se1—Cs1ⁱ	−115.50 (7)	Se1^v—Sn—Se3—Cs2	73.18 (10)
Se3ⁱⁱⁱ—Cs1—Se1—Cs1ⁱ	122.01 (7)	Se2—Sn—Se3—Cs1^xi	41.53 (7)
Se2^iv—Cs1—Se1—Cs1ⁱ	8.36 (5)	Se1—Sn—Se3—Cs1^xi	166.99 (6)
Se1^v—Cs1—Se1—Cs1ⁱ	176.58 (8)	Se1^v—Sn—Se3—Cs1^xi	−85.53 (9)
Se3ⁱⁱ—Cs1—Se1—Cs1ⁱ	54.4 (3)	Se2^iv—Cs2—Se3—Sn	31.69 (7)
Se3^iv—Cs1—Se1—Cs1ⁱ	−43.26 (6)	Se2^viii—Cs2—Se3—Sn	98.80 (7)
Sn^iv—Cs1—Se1—Cs1ⁱ	−29.56 (5)	Se2^ix—Cs2—Se3—Sn	105.6 (3)
Se2ⁱ—Cs1—Se1—Cs2	173.24 (6)	Se3ⁱⁱⁱ—Cs2—Se3—Sn	−72.28 (8)
Se2ⁱⁱ—Cs1—Se1—Cs2	172.13 (8)	Se3^x—Cs2—Se3—Sn	−148.66 (6)
Se3ⁱⁱⁱ—Cs1—Se1—Cs2	49.65 (5)	Se1—Cs2—Se3—Sn	23.95 (6)
Se2^iv—Cs1—Se1—Cs2	−64.01 (5)	Se1^x—Cs2—Se3—Sn	152.96 (7)
Se1^v—Cs1—Se1—Cs2	104.21 (6)	Se1ⁱⁱⁱ—Cs2—Se3—Sn	−80.56 (8)
Se3ⁱⁱ—Cs1—Se1—Cs2	−18.0 (2)	Se2^iv—Cs2—Se3—Sr^xiv	142.16 (4)
Se3^iv—Cs1—Se1—Cs2	−115.63 (6)	Se2^viii—Cs2—Se3—Sr^xiv	−150.73 (4)
Sn^iv—Cs1—Se1—Cs2	−101.93 (5)	Se2^ix—Cs2—Se3—Sr^xiv	−143.9 (3)
Se2^iv—Cs2—Se1—Sn	165.10 (7)	Se3ⁱⁱⁱ—Cs2—Se3—Sr^xiv	38.189 (18)
Se2^viii—Cs2—Se1—Sn	−137.94 (6)	Se3^x—Cs2—Se3—Sr^xiv	−38.189 (18)
Se2^ix—Cs2—Se1—Sn	166.88 (6)	Se1—Cs2—Se3—Sr^xiv	134.42 (5)
Se3—Cs2—Se1—Sn	−23.03 (5)	Se1^x—Cs2—Se3—Sr^xiv	−96.57 (5)
Se3ⁱⁱⁱ—Cs2—Se1—Sn	48.45 (6)	Se1ⁱⁱⁱ—Cs2—Se3—Sr^xiv	29.91 (6)
Se3^x—Cs2—Se1—Sn	−13.81 (8)	Se2^iv—Cs2—Se3—Cs1^x	−72.98 (6)
Se1^x—Cs2—Se1—Sn	−86.46 (9)	Se2^viii—Cs2—Se3—Cs1^x	−5.87 (5)
Se1ⁱⁱⁱ—Cs2—Se1—Sn	98.45 (9)	Se2^ix—Cs2—Se3—Cs1^x	1.0 (3)
Se2^iv—Cs2—Se1—Snⁱ	42.15 (14)	Se3ⁱⁱⁱ—Cs2—Se3—Cs1^x	−176.96 (5)
Se2^viii—Cs2—Se1—Snⁱ	99.11 (14)	Se3^x—Cs2—Se3—Cs1^x	106.66 (6)
Se2^ix—Cs2—Se1—Snⁱ	43.93 (17)	Se1—Cs2—Se3—Cs1^x	−80.73 (5)
Se3—Cs2—Se1—Snⁱ	−145.98 (16)	Se1^x—Cs2—Se3—Cs1^x	48.28 (4)
Se3ⁱⁱⁱ—Cs2—Se1—Snⁱ	−74.50 (16)	Se1ⁱⁱⁱ—Cs2—Se3—Cs1^x	174.76 (5)
Se3^x—Cs2—Se1—Snⁱ	−136.76 (13)	Cs1—Cs2—Se3—Cs1^x	−125.65 (4)
Se1^x—Cs2—Se1—Snⁱ	150.59 (10)	Cs1ⁱⁱⁱ—Cs2—Se3—Cs1^x	103.58 (4)
Se1ⁱⁱⁱ—Cs2—Se1—Snⁱ	−24.5 (2)	Se2^iv—Cs2—Se3—Cs1^xii	−59.04 (9)
Se2^iv—Cs2—Se1—Cs1ⁱ	−52.83 (5)	Se2^viii—Cs2—Se3—Cs1^xii	8.07 (9)
Se2^viii—Cs2—Se1—Cs1ⁱ	4.13 (5)	Se2^ix—Cs2—Se3—Cs1^xii	14.9 (3)
Se2^ix—Cs2—Se1—Cs1ⁱ	−51.04 (6)	Se3ⁱⁱⁱ—Cs2—Se3—Cs1^xii	−163.02 (10)
Se3—Cs2—Se1—Cs1ⁱ	119.04 (6)	Se3^x—Cs2—Se3—Cs1^xii	120.60 (10)
Se3ⁱⁱⁱ—Cs2—Se1—Cs1ⁱ	−169.48 (5)	Se1—Cs2—Se3—Cs1^xii	−66.79 (8)
Se3^x—Cs2—Se1—Cs1ⁱ	128.27 (6)	Se1^x—Cs2—Se3—Cs1^xii	62.22 (8)
Se1^x—Cs2—Se1—Cs1ⁱ	55.62 (9)	Se1ⁱⁱⁱ—Cs2—Se3—Cs1^xii	−171.30 (7)
Se1ⁱⁱⁱ—Cs2—Se1—Cs1ⁱ	−119.47 (8)	Se2^iv—Cs2—Se3—Cs1^xi	114.24 (15)
Se2^iv—Cs2—Se1—Cs1	68.30 (5)	Se2^viii—Cs2—Se3—Cs1^xi	−178.65 (14)
Se2^viii—Cs2—Se1—Cs1	125.27 (6)	Se2^ix—Cs2—Se3—Cs1^xi	−171.8 (3)
Se2^ix—Cs2—Se1—Cs1	70.09 (5)	Se3ⁱⁱⁱ—Cs2—Se3—Cs1^xi	10.26 (14)
Se3—Cs2—Se1—Cs1	−119.82 (6)	Se3^x—Cs2—Se3—Cs1^xi	−66.12 (12)
Se3ⁱⁱⁱ—Cs2—Se1—Cs1	−48.35 (4)	Se1—Cs2—Se3—Cs1^xi	106.49 (16)
Se3^x—Cs2—Se1—Cs1	−110.60 (6)	Se1^x—Cs2—Se3—Cs1^xi	−124.50 (15)
Se1^x—Cs2—Se1—Cs1	176.75 (8)	Se1ⁱⁱⁱ—Cs2—Se3—Cs1^xi	1.98 (18)
Se1ⁱⁱⁱ—Cs2—Se1—Cs1	1.66 (9)

Symmetry codes: (i) −y+4/3, x−y−1/3, z−1/3; (ii) x+1/3, y+2/3, z−1/3; (iii) −y+1, x−y, z; (iv) −x+y+5/3, −x+4/3, z−2/3; (v) −x+y+5/3, −x+4/3, z+1/3; (vi) −x+y+4/3, −x+5/3, z−1/3; (vii) −y+5/3, x−y+1/3, z+1/3; (viii) −y+2/3, x−y−2/3, z−2/3; (ix) x−1/3, y+1/3, z−2/3; (x) −x+y+1, −x+1, z; (xi) −y+4/3, x−y−1/3, z+2/3; (xii) x−1/3, y−2/3, z+1/3; (xiii) x+2/3, y−2/3, z+1/3; (xiv) x+1/3, y−1/3, z+2/3; (xv) x−2/3, y+2/3, z−1/3; (xvi) −y+1/3, x−y−1/3, z−1/3; (xvii) −y+2/3, x−y+1/3, z−2/3; (xviii) −x+y+2/3, −x+4/3, z−2/3; (xix) −x+y+1, −x+2, z; (xx) x−1, y, z; (xxi) x−1/3, y+1/3, z+1/3.

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Tetra­caesium strontium catena-nona­selenidotristannate(IV)

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Tetracaesium strontium catena-nonaselenidotristannate(IV)