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Dy4(SiS4)3 is isotypic with Tb4(SiS4)3 [Hatscher & Urland (2002). Z. Anorg. Allg. Chem. 628, 1673-1677]. It contains almost undistorted, isolated (SiS4)4- tetrahedra and four crystallographically different Dy positions with coordination numbers seven and eight.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536802014137/mg6013sup1.cif
Contains datablocks global, I

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S1600536802014137/mg6013Isup2.hkl
Contains datablock I

Key indicators

  • Single-crystal X-ray study
  • T = 293 K
  • Mean [sigma](S-Si) = 0.002 Å
  • R factor = 0.023
  • wR factor = 0.047
  • Data-to-parameter ratio = 24.2

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry


Yellow Alert Alert Level C:
RINTA_01 Alert C The value of Rint is greater than 0.10 Rint given 0.120
0 Alert Level A = Potentially serious problem
0 Alert Level B = Potential problem
1 Alert Level C = Please check

Comment top

Only a few thiosilicate compounds with lanthanide ions are known: Ln2SiS5 (Ln = La—Nd) with unknown structure (Michelet et al., 1970), Ln6Si2.5S14 (Ln = Gd—Dy, Y) (Michelet & Flahaut, 1969; Perez & Duale, 1969), trigonal Ln4Si3S12 (Ln = Ce—Sm, Gd) (Perez & Duale, 1969), and more recently Eu2SiS4 (Johrendt & Pocha, 2001). In all the reported structures, isolated SiS4 tetrahedra are a dominant feature, one exception being the second Si position in Ln6Si2.5S14, which is coordinated by six sulfides in the shape of a slightly distorted octahedron. Also known are lanthanide thiogermanates, such as La4(GeS4)3 (Mazurier & Etienne, 1974) containing isolated GeS4 groups. The formation of corner-sharing tetrahedra resulting in Si2O76− anions, commonly seen in lanthanide oxosilicates, is up to now unknown for the lanthanide thiosilicates.

We recently reported the structure of a new lanthanide thiosilicate Tb4(SiS4)3 (Hatscher & Urland, 2002) and present here the homologous dysprosium compound. The isolated (SiS4)4− tetrahedra (Fig. 1) are slightly distorted and contain Si—S distances between 2.062 (2) and 2.150 (2) Å, in agreement with those reported for SiS2 (Buessem et al., 1935). La4(GeS4)3 has a similar formula but the arrangement of tetrahedra differs (Mazurier & Etienne, 1974). There is no known lanthanide oxosilicate analogue.

The Dy1, Dy2 and Dy3 ions are each coordinated by eight sulfide ions. Two Dy1S8 polyhedra share edges to form dimers. The same basic motif can be found for Dy2 and Dy3. Dy4 is surrounded by only seven sulfide ions and forms infinite chains along [010] by sharing two opposite corners with other Dy4S7 building blocks. The dimers of Dy1, Dy2, and Dy3 form a three-dimensional network consisting of alternating building blocks, which results in a channel structure that is filled by the one-dimensional chain of Dy4 (Fig. 2).

Experimental top

Dysprosium metal chips (StremChem, 99.9%), sulfur powder (Aldrich, 99.98%), silicon powder (Merck, >99%), and bromine (Riedel-de Haën, >99%) were added in a quartz glass tube in a ratio of 1:3.28:1.06:~0.3. The ampoule was evacuated, sealed, and heated for 10 d in a temperature gradient of 1273 to 1073 K. After the tube was cooled, a few air-stable green crystals were obtained.

Computing details top

Data collection: IPDS Software (Stoe & Cie, 1998); cell refinement: IPDS Software; data reduction: IPDS Software; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: DIAMOND (Brandenburg, 1998); software used to prepare material for publication: SHELXL97.

Figures top
[Figure 1] Fig. 1. View of Dy4(SiS4)3. The isolated SiS4 building blocks are indicated by grey tetrahedra.
[Figure 2] Fig. 2. The connection theme of Dy4(SiS4)3 viewed along the b axis. Dy1 polyhedra are in red, Dy2 in yellow and Dy3 in blue. In the centre, one Dy4 is depicted.
dysprosium(III)-ortho-thiosilicate top
Crystal data top
Dy4(SiS4)3F(000) = 1992
Mr = 1118.99Dx = 4.341 Mg m3
Monoclinic, P21/nMelting point: not measured K
Hall symbol: -P 2ynMo Kα radiation, λ = 0.71073 Å
a = 9.813 (2) ÅCell parameters from 7997 reflections
b = 10.9387 (18) Åθ = 2.5–28.1°
c = 16.360 (4) ŵ = 18.91 mm1
β = 102.86 (3)°T = 293 K
V = 1712.1 (6) Å3Plate, green
Z = 40.22 × 0.10 × 0.02 mm
Data collection top
STOE IPDS
diffractometer
4184 independent reflections
Radiation source: fine-focus sealed tube3327 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.120
Detector resolution: 60 pixels mm-1θmax = 28.2°, θmin = 2.2°
240 exposures, Δ ϕ 1.2 ° scansh = 1213
Absorption correction: gaussian
(X-RED; Stoe & Cie, 1998)
k = 1414
Tmin = 0.117, Tmax = 0.685l = 2121
29396 measured reflections
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.023 w = 1/[σ2(Fo2)]
wR(F2) = 0.047(Δ/σ)max = 0.001
S = 0.87Δρmax = 1.29 e Å3
4184 reflectionsΔρmin = 1.42 e Å3
173 parametersExtinction correction: SHELXL97, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
0 restraintsExtinction coefficient: 0.00081 (4)
Crystal data top
Dy4(SiS4)3V = 1712.1 (6) Å3
Mr = 1118.99Z = 4
Monoclinic, P21/nMo Kα radiation
a = 9.813 (2) ŵ = 18.91 mm1
b = 10.9387 (18) ÅT = 293 K
c = 16.360 (4) Å0.22 × 0.10 × 0.02 mm
β = 102.86 (3)°
Data collection top
STOE IPDS
diffractometer
4184 independent reflections
Absorption correction: gaussian
(X-RED; Stoe & Cie, 1998)
3327 reflections with I > 2σ(I)
Tmin = 0.117, Tmax = 0.685Rint = 0.120
29396 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.023173 parameters
wR(F2) = 0.0470 restraints
S = 0.87Δρmax = 1.29 e Å3
4184 reflectionsΔρmin = 1.42 e Å3
Special details top

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
xyzUiso*/Ueq
Dy10.61037 (2)0.98387 (3)0.124986 (17)0.01090 (7)
Dy20.87638 (2)0.65205 (3)0.059681 (16)0.01025 (7)
Dy30.53109 (2)0.37677 (3)0.131055 (17)0.01181 (7)
Dy40.32137 (2)0.76108 (3)0.288987 (17)0.01307 (7)
S10.50347 (11)0.77960 (14)0.18937 (9)0.0130 (3)
S20.41939 (11)0.15310 (14)0.18410 (8)0.0113 (3)
S30.74682 (11)0.21352 (14)0.13550 (9)0.0115 (3)
S40.84701 (11)0.83727 (13)0.18728 (8)0.0099 (3)
S50.61230 (11)0.75951 (13)0.01329 (9)0.0110 (3)
S60.91010 (11)0.84639 (14)0.94613 (9)0.0137 (3)
S70.04205 (11)0.43674 (14)0.09416 (9)0.0123 (3)
S80.34970 (11)0.48068 (14)0.22872 (9)0.0141 (3)
S90.66502 (11)0.47329 (14)0.97688 (9)0.0130 (3)
S100.15065 (11)0.73252 (13)0.12650 (9)0.0115 (3)
S110.65770 (11)0.05886 (14)0.97265 (9)0.0121 (3)
S120.75600 (11)0.54329 (13)0.18751 (9)0.0115 (3)
Si10.22185 (12)0.55471 (15)0.11744 (10)0.0103 (3)
Si20.70047 (12)0.88347 (15)0.93948 (10)0.0103 (3)
Si30.70889 (12)0.71649 (15)0.23333 (10)0.0096 (3)
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Dy10.01038 (10)0.00939 (14)0.01267 (13)0.00096 (8)0.00202 (8)0.00137 (11)
Dy20.00816 (10)0.01019 (14)0.01199 (13)0.00129 (8)0.00136 (8)0.00045 (11)
Dy30.00955 (10)0.01044 (15)0.01395 (14)0.00056 (8)0.00058 (8)0.00045 (11)
Dy40.01157 (10)0.01701 (16)0.01117 (13)0.00360 (9)0.00366 (8)0.00137 (12)
S10.0081 (5)0.0163 (8)0.0150 (7)0.0013 (4)0.0034 (4)0.0045 (6)
S20.0089 (5)0.0139 (8)0.0106 (6)0.0006 (4)0.0007 (4)0.0014 (6)
S30.0125 (5)0.0119 (8)0.0103 (6)0.0002 (5)0.0025 (4)0.0012 (6)
S40.0081 (4)0.0095 (7)0.0117 (6)0.0004 (4)0.0014 (4)0.0007 (6)
S50.0104 (5)0.0107 (7)0.0118 (7)0.0005 (4)0.0021 (4)0.0012 (6)
S60.0096 (5)0.0148 (8)0.0161 (7)0.0016 (5)0.0013 (4)0.0013 (6)
S70.0118 (5)0.0096 (7)0.0146 (7)0.0009 (5)0.0014 (4)0.0022 (6)
S80.0124 (5)0.0154 (8)0.0129 (7)0.0035 (5)0.0008 (4)0.0027 (6)
S90.0124 (5)0.0138 (8)0.0131 (7)0.0027 (5)0.0035 (4)0.0008 (6)
S100.0093 (5)0.0096 (7)0.0141 (7)0.0015 (4)0.0005 (4)0.0011 (6)
S110.0132 (5)0.0100 (7)0.0129 (7)0.0003 (5)0.0026 (4)0.0012 (6)
S120.0120 (5)0.0089 (7)0.0138 (7)0.0015 (4)0.0030 (4)0.0013 (6)
Si10.0105 (5)0.0095 (8)0.0100 (7)0.0016 (5)0.0006 (5)0.0005 (7)
Si20.0097 (5)0.0108 (8)0.0098 (7)0.0016 (5)0.0008 (5)0.0007 (7)
Si30.0086 (5)0.0099 (8)0.0101 (7)0.0003 (5)0.0016 (5)0.0015 (7)
Geometric parameters (Å, º) top
Dy1—S11i2.7597 (15)Dy3—S4viii2.9780 (16)
Dy1—S12.7740 (15)Dy3—S9vi3.2680 (15)
Dy1—S11ii2.7962 (14)Dy4—S12.6809 (14)
Dy1—S42.8194 (13)Dy4—S2ix2.7629 (13)
Dy1—S3iii2.8338 (15)Dy4—S6x2.7844 (16)
Dy1—S2iii2.9464 (14)Dy4—S102.8263 (16)
Dy1—S53.0625 (15)Dy4—S7ix2.8289 (15)
Dy1—S12iv3.1243 (16)Dy4—S8ix2.9079 (16)
Dy2—S52.7924 (13)Dy4—S83.2526 (17)
Dy2—S10v2.8114 (13)Si1—S72.1504 (19)
Dy2—S7v2.8460 (15)Si1—S82.128 (2)
Dy2—S122.8783 (15)Si1—S9ii2.114 (2)
Dy2—S6vi2.8903 (16)Si1—S102.083 (2)
Dy2—S9vi2.9512 (15)Si2—S2ii2.138 (2)
Dy2—S42.9688 (15)Si2—S5xi2.124 (2)
Dy2—S7vii2.9691 (16)Si2—S62.0757 (17)
Dy3—S32.7580 (14)Si2—S11iii2.062 (2)
Dy3—S9ii2.8281 (15)Si3—S12.1003 (17)
Dy3—S122.8520 (13)Si3—S3iv2.093 (2)
Dy3—S82.8774 (15)Si3—S42.1458 (19)
Dy3—S5vii2.8809 (15)Si3—S122.126 (2)
Dy3—S22.8921 (15)
S11i—Dy1—S1137.41 (4)S1—Dy4—S8ix108.98 (4)
S11i—Dy1—S11ii81.94 (4)S2ix—Dy4—S8ix82.75 (4)
S1—Dy1—S11ii72.25 (4)S6x—Dy4—S8ix119.71 (4)
S11i—Dy1—S4101.82 (4)S10—Dy4—S8ix77.85 (4)
S1—Dy1—S475.83 (4)S7ix—Dy4—S8ix71.48 (4)
S11ii—Dy1—S4134.89 (4)S1—Dy4—S876.90 (4)
S11i—Dy1—S3iii67.61 (4)S2ix—Dy4—S877.23 (4)
S1—Dy1—S3iii154.76 (4)S6x—Dy4—S881.46 (4)
S11ii—Dy1—S3iii123.68 (4)S10—Dy4—S871.54 (4)
S4—Dy1—S3iii98.18 (4)S7ix—Dy4—S8141.80 (4)
S11i—Dy1—S2iii110.91 (4)S8ix—Dy4—S8146.638 (19)
S1—Dy1—S2iii93.41 (4)S1—Dy4—Si2x150.89 (4)
S11ii—Dy1—S2iii72.92 (4)S2ix—Dy4—Si2x39.42 (4)
S4—Dy1—S2iii140.50 (4)S6x—Dy4—Si2x38.09 (3)
S3iii—Dy1—S2iii75.50 (4)S10—Dy4—Si2x113.92 (4)
S11i—Dy1—S571.01 (4)S7ix—Dy4—Si2x90.91 (4)
S1—Dy1—S568.54 (4)S8ix—Dy4—Si2x99.89 (4)
S11ii—Dy1—S569.83 (4)S8—Dy4—Si2x81.15 (4)
S4—Dy1—S569.26 (4)Si3—S1—Dy4119.07 (7)
S3iii—Dy1—S5132.92 (4)Si3—S1—Dy188.83 (6)
S2iii—Dy1—S5142.02 (3)Dy4—S1—Dy1130.64 (6)
S11i—Dy1—S12iv134.97 (4)Si2ii—S2—Dy4xiii85.46 (5)
S1—Dy1—S12iv84.62 (4)Si2ii—S2—Dy392.29 (7)
S11ii—Dy1—S12iv137.01 (4)Dy4xiii—S2—Dy394.64 (5)
S4—Dy1—S12iv68.38 (4)Si2ii—S2—Dy1xiv80.11 (6)
S3iii—Dy1—S12iv70.52 (4)Dy4xiii—S2—Dy1xiv161.77 (5)
S2iii—Dy1—S12iv72.88 (4)Dy3—S2—Dy1xiv96.99 (4)
S5—Dy1—S12iv134.07 (4)Si3viii—S3—Dy390.00 (6)
S11i—Dy1—Si2xii84.89 (4)Si3viii—S3—Dy1xiv93.64 (7)
S1—Dy1—Si2xii94.25 (4)Dy3—S3—Dy1xiv102.88 (4)
S11ii—Dy1—Si2xii38.10 (4)Si3—S4—Dy186.75 (5)
S4—Dy1—Si2xii170.05 (4)Si3—S4—Dy289.68 (6)
S3iii—Dy1—Si2xii91.15 (4)Dy1—S4—Dy2109.58 (5)
S2iii—Dy1—Si2xii39.24 (4)Si3—S4—Dy3iv83.32 (6)
S5—Dy1—Si2xii106.69 (4)Dy1—S4—Dy3iv113.19 (5)
S12iv—Dy1—Si2xii112.02 (4)Dy2—S4—Dy3iv136.10 (5)
S5—Dy2—S10v136.39 (4)Si2vi—S5—Dy287.28 (5)
S5—Dy2—S7v148.96 (4)Si2vi—S5—Dy3vii92.91 (6)
S10v—Dy2—S7v74.15 (4)Dy2—S5—Dy3vii105.03 (5)
S5—Dy2—S1282.26 (4)Si2vi—S5—Dy183.40 (7)
S10v—Dy2—S12111.05 (4)Dy2—S5—Dy1107.69 (4)
S7v—Dy2—S1279.79 (4)Dy3vii—S5—Dy1146.83 (4)
S5—Dy2—S6vi75.39 (4)Si2—S6—Dy4xv86.08 (6)
S10v—Dy2—S6vi77.46 (4)Si2—S6—Dy2xi85.61 (6)
S7v—Dy2—S6vi126.44 (4)Dy4xv—S6—Dy2xi103.06 (5)
S12—Dy2—S6vi153.54 (4)Si1—S7—Dy4xiii92.37 (6)
S5—Dy2—S9vi68.86 (4)Si1—S7—Dy2xvi87.05 (7)
S10v—Dy2—S9vi154.17 (4)Dy4xiii—S7—Dy2xvi149.30 (6)
S7v—Dy2—S9vi81.65 (4)Si1—S7—Dy2vii88.91 (6)
S12—Dy2—S9vi72.51 (4)Dy4xiii—S7—Dy2vii100.03 (4)
S6vi—Dy2—S9vi111.20 (4)Dy2xvi—S7—Dy2vii110.65 (5)
S5—Dy2—S470.99 (4)Si1—S8—Dy389.72 (6)
S10v—Dy2—S475.36 (4)Si1—S8—Dy4xiii90.68 (6)
S7v—Dy2—S4124.47 (4)Dy3—S8—Dy4xiii91.90 (5)
S12—Dy2—S469.60 (4)Si1—S8—Dy480.01 (6)
S6vi—Dy2—S489.59 (4)Dy3—S8—Dy4130.24 (5)
S9vi—Dy2—S4127.35 (4)Dy4xiii—S8—Dy4136.28 (4)
S5—Dy2—S7vii108.44 (4)Si1ii—S9—Dy3ii91.33 (6)
S10v—Dy2—S7vii90.95 (4)Si1ii—S9—Dy2xi90.08 (6)
S7v—Dy2—S7vii69.35 (5)Dy3ii—S9—Dy2xi102.32 (5)
S12—Dy2—S7vii135.43 (4)Si1ii—S9—Dy3xi152.03 (8)
S6vi—Dy2—S7vii66.71 (4)Dy3ii—S9—Dy3xi109.55 (4)
S9vi—Dy2—S7vii71.86 (4)Dy2xi—S9—Dy3xi102.83 (4)
S4—Dy2—S7vii154.96 (4)Si1—S10—Dy2xvi89.27 (6)
S3—Dy3—S9ii143.47 (4)Si1—S10—Dy491.85 (6)
S3—Dy3—S1282.58 (4)Dy2xvi—S10—Dy4135.73 (5)
S9ii—Dy3—S12101.64 (4)Si2xiv—S11—Dy1xvii92.65 (7)
S3—Dy3—S8143.82 (4)Si2xiv—S11—Dy1ii85.12 (6)
S9ii—Dy3—S872.46 (4)Dy1xvii—S11—Dy1ii98.06 (4)
S12—Dy3—S895.60 (4)Si3—S12—Dy3118.04 (6)
S3—Dy3—S5vii85.33 (4)Si3—S12—Dy292.55 (7)
S9ii—Dy3—S5vii69.39 (4)Dy3—S12—Dy2116.22 (5)
S12—Dy3—S5vii142.89 (4)Si3—S12—Dy1viii85.18 (6)
S8—Dy3—S5vii114.20 (4)Dy3—S12—Dy1viii108.09 (5)
S3—Dy3—S277.54 (4)Dy2—S12—Dy1viii130.46 (4)
S9ii—Dy3—S2115.30 (4)S10—Si1—S9ii115.23 (9)
S12—Dy3—S2139.53 (4)S10—Si1—S8115.95 (9)
S8—Dy3—S281.08 (4)S9ii—Si1—S8105.30 (8)
S5vii—Dy3—S270.10 (4)S10—Si1—S7107.33 (7)
S3—Dy3—S4viii75.19 (4)S9ii—Si1—S7109.10 (9)
S9ii—Dy3—S4viii140.68 (4)S8—Si1—S7103.14 (9)
S12—Dy3—S4viii70.09 (4)S11iii—Si2—S6115.18 (9)
S8—Dy3—S4viii70.35 (4)S11iii—Si2—S5xi108.17 (8)
S5vii—Dy3—S4viii139.23 (4)S6—Si2—S5xi111.71 (9)
S2—Dy3—S4viii70.89 (4)S11iii—Si2—S2ii108.75 (8)
S3—Dy3—S9vi77.96 (4)S6—Si2—S2ii110.06 (9)
S9ii—Dy3—S9vi70.45 (4)S5xi—Si2—S2ii102.13 (8)
S12—Dy3—S9vi68.19 (4)S11iii—Si2—Dy1xii56.78 (5)
S8—Dy3—S9vi134.89 (4)S6—Si2—Dy1xii158.27 (8)
S5vii—Dy3—S9vi75.02 (4)S5xi—Si2—Dy1xii89.88 (5)
S2—Dy3—S9vi138.53 (4)S2ii—Si2—Dy1xii60.65 (5)
S4viii—Dy3—S9vi132.53 (3)S11iii—Si2—Dy4xv139.20 (8)
S1—Dy4—S2ix146.99 (5)S6—Si2—Dy4xv55.84 (6)
S1—Dy4—S6x118.65 (4)S5xi—Si2—Dy4xv111.81 (7)
S2ix—Dy4—S6x77.00 (4)S2ii—Si2—Dy4xv55.13 (5)
S1—Dy4—S1076.84 (4)Dy1xii—Si2—Dy4xv114.92 (5)
S2ix—Dy4—S1075.75 (4)S3iv—Si3—S1108.70 (8)
S6x—Dy4—S10145.07 (4)S3iv—Si3—S12109.63 (9)
S1—Dy4—S7ix94.58 (4)S1—Si3—S12116.08 (9)
S2ix—Dy4—S7ix118.42 (4)S3iv—Si3—S4111.49 (8)
S6x—Dy4—S7ix70.07 (5)S1—Si3—S4108.09 (9)
S10—Dy4—S7ix143.43 (4)S12—Si3—S4102.77 (8)
Symmetry codes: (i) x, y+1, z1; (ii) x+1, y+1, z+1; (iii) x, y+1, z; (iv) x+3/2, y+1/2, z+1/2; (v) x+1, y, z; (vi) x, y, z1; (vii) x+1, y+1, z; (viii) x+3/2, y1/2, z+1/2; (ix) x+1/2, y+1/2, z+1/2; (x) x1/2, y+3/2, z1/2; (xi) x, y, z+1; (xii) x+1, y+2, z+1; (xiii) x+1/2, y1/2, z+1/2; (xiv) x, y1, z; (xv) x+1/2, y+3/2, z+1/2; (xvi) x1, y, z; (xvii) x, y1, z+1.

Experimental details

Crystal data
Chemical formulaDy4(SiS4)3
Mr1118.99
Crystal system, space groupMonoclinic, P21/n
Temperature (K)293
a, b, c (Å)9.813 (2), 10.9387 (18), 16.360 (4)
β (°) 102.86 (3)
V3)1712.1 (6)
Z4
Radiation typeMo Kα
µ (mm1)18.91
Crystal size (mm)0.22 × 0.10 × 0.02
Data collection
DiffractometerSTOE IPDS
diffractometer
Absorption correctionGaussian
(X-RED; Stoe & Cie, 1998)
Tmin, Tmax0.117, 0.685
No. of measured, independent and
observed [I > 2σ(I)] reflections
29396, 4184, 3327
Rint0.120
(sin θ/λ)max1)0.665
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.023, 0.047, 0.87
No. of reflections4184
No. of parameters173
Δρmax, Δρmin (e Å3)1.29, 1.42

Computer programs: IPDS Software (Stoe & Cie, 1998), IPDS Software, SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), DIAMOND (Brandenburg, 1998), SHELXL97.

Selected bond lengths (Å) top
Dy1—S11i2.7597 (15)Dy3—S4viii2.9780 (16)
Dy1—S12.7740 (15)Dy3—S9vi3.2680 (15)
Dy1—S11ii2.7962 (14)Dy4—S12.6809 (14)
Dy1—S42.8194 (13)Dy4—S2ix2.7629 (13)
Dy1—S3iii2.8338 (15)Dy4—S6x2.7844 (16)
Dy1—S2iii2.9464 (14)Dy4—S102.8263 (16)
Dy1—S53.0625 (15)Dy4—S7ix2.8289 (15)
Dy1—S12iv3.1243 (16)Dy4—S8ix2.9079 (16)
Dy2—S52.7924 (13)Dy4—S83.2526 (17)
Dy2—S10v2.8114 (13)Si1—S72.1504 (19)
Dy2—S7v2.8460 (15)Si1—S82.128 (2)
Dy2—S122.8783 (15)Si1—S9ii2.114 (2)
Dy2—S6vi2.8903 (16)Si1—S102.083 (2)
Dy2—S9vi2.9512 (15)Si2—S2ii2.138 (2)
Dy2—S42.9688 (15)Si2—S5xi2.124 (2)
Dy2—S7vii2.9691 (16)Si2—S62.0757 (17)
Dy3—S32.7580 (14)Si2—S11iii2.062 (2)
Dy3—S9ii2.8281 (15)Si3—S12.1003 (17)
Dy3—S122.8520 (13)Si3—S3iv2.093 (2)
Dy3—S82.8774 (15)Si3—S42.1458 (19)
Dy3—S5vii2.8809 (15)Si3—S122.126 (2)
Dy3—S22.8921 (15)
Symmetry codes: (i) x, y+1, z1; (ii) x+1, y+1, z+1; (iii) x, y+1, z; (iv) x+3/2, y+1/2, z+1/2; (v) x+1, y, z; (vi) x, y, z1; (vii) x+1, y+1, z; (viii) x+3/2, y1/2, z+1/2; (ix) x+1/2, y+1/2, z+1/2; (x) x1/2, y+3/2, z1/2; (xi) x, y, z+1.
 

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