The title compound, rubidium ditin(IV) tris­(phosphate), RbSn2(PO4)3, belongs to the NASICON-type family of phosphates and crystallizes in the space group R
               . The structure is composed of PO4 tetra­hedra (1 symmetry) and two slightly distorted SnO6 octa­hedra, both with 3. symmetry, which are inter­linked through corner-sharing O atoms to form a 3
               ∞[Sn2(PO4)3]− framework. The Rb+ cations are located on threefold inversion axes in the voids of this framework and exhibit a coordination number of 12. The crystal studied was twinned by merohedry with a component ratio of 0.503:0.497

Boilot

Boujelben

Dan Zhao

Duhlev

FeiFei Li

Jiali Jiao

Junran Ren

Sheldrick

Shen Qiu

Spek

Zatovskii

Zhao

English

PubMed

The title compound, rubidium ditin(IV) tris(phosphate), RbSn2(PO4)3, belongs to the NASICON-type family of phosphates and crystallizes in the space group Roverline{3}. The structure is composed of PO4 tetrahedra (1 symmetry) and two slightly distorted SnO6 octahedra, both with 3. symmetry, which are interlinked through corner-sharing O atoms to form a 3&amp;#8734;[Sn2(PO4)3]&amp;#8722; framework. The Rb+ cations are located on threefold inversion axes in the voids of this framework and exhibit a coordination number of 12. The crystal studied was twinned by merohedry with a component ratio of 0.503:0.497

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Acta Crystallographica Section E Structure Reports Online

RbSn2(PO4)3, a NASICON-type phosphate

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RbSn2(PO4)3, a NASICON-typephosphateDan Zhao,* FeiFei Li, Shen Qiu, Jiali Jiao and Junran RenDepartment of Physics and Chemistry, Henan Polytechnic University, Jiaozuo,Henan 454000, People’s Republic of ChinaCorrespondence e-mail: iamzd@hpu.edu.cnReceived 13 March 2011; accepted 16 April 2011Key indicators: single-crystal X-ray study; T = 293 K; mean (P–O) = 0.005 A˚;R factor = 0.026; wR factor = 0.043; data-to-parameter ratio = 13.0.The title compound, rubidium ditin(IV) tris(phosphate),RbSn2(PO4)3, belongs to the NASICON-type family ofphosphates and crystallizes in the space group R3. Thestructure is composed of PO4 tetrahedra (1 symmetry) andtwo slightly distorted SnO6 octahedra, both with 3. symmetry,which are interlinked through corner-sharing O atoms to forma 31[Sn2(PO4)3] framework. The Rb+ cations are located onthreefold inversion axes in the voids of this framework andexhibit a coordination number of 12. The crystal studied wastwinned by merohedry with a component ratio of 0.503:0.497.Related literatureFor related NASICON-type compounds, see: Boilot et al.(1987); Boujelben et al. (2007); Duhlev (1994); Zatovskii et al.(2006); Zhao et al. (2011).ExperimentalCrystal dataRbSn2(PO4)3Mr = 607.76Trigonal, R3a = 8.340 (4) A˚c = 24.007 (8) A˚V = 1446.1 (6) A˚3Z = 6Mo K radiation = 10.76 mm1T = 293 K0.20  0.05  0.05 mmData collectionRigaku Mercury70 CCDdiffractometerAbsorption correction: multi-scan(ABSCOR; Higashi, 1995)Tmin = 0.222, Tmax = 0.6153765 measured reflections742 independent reflections711 reflections with I > 2(I)Rint = 0.036RefinementR[F 2 > 2(F 2)] = 0.026wR(F 2) = 0.043S = 1.16742 reflections57 parametersmax = 0.65 e A˚3min = 0.73 e A˚3Table 1Selected bond lengths (A˚).Sn1—O2 2.015 (4)Sn1—O3i 2.033 (4)P1—O2 1.523 (4)P1—O1 1.529 (4)P1—O3 1.533 (4)P1—O4 1.537 (4)Symmetry code: (i) y;xþ y;z.Data collection: CrystalClear (Rigaku, 2004); cell refinement:CrystalClear; data reduction: CrystalClear; program(s) used to solvestructure: SHELXS97 (Sheldrick, 2008) and PLATON (Spek, 2009);program(s) used to refine structure: SHELXL97 (Sheldrick, 2008);molecular graphics: DIAMOND (Brandenburg, 2004); software usedto prepare material for publication: SHELXTL (Sheldrick, 2008).The authors acknowledge the Doctoral Foundation ofHenan Polytechnic University (grant No. B2010–92, 648483).Supplementary data and figures for this paper are available from theIUCr electronic archives (Reference: WM2466).ReferencesBoilot, J. P., Collin, G. & Colomban, Ph. (1987).Mater. Res. Bull. 22, 669–676.Boujelben, M., Toumi, M. & Mhiri, T. (2007). Acta Cryst. E63, i157.Brandenburg, K. (2004). DIAMOND. Crystal Impact GbR, Bonn, Germany.Duhlev, R. (1994). Acta Cryst. C50, 1525–1527.Higashi, T. (1995). ABSCOR. Rigaku Corporation, Tokyo, Japan.Rigaku (2004). CrystalClear. Rigaku Corporation, Tokyo, Japan.Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122.Spek, A. L. (2009). Acta Cryst. D65, 148–155.Zatovskii, I. V., Ushchapovskaya, T. I., Slobodyanik, N. S. & Ogorodnik, I. V.(2006). Zh. Neorg. Khim. 51, 41–46.Zhao, D., Liang, P., Su, L., Chang, H. & Yan, S. (2011). Acta Cryst. E67, i23.inorganic compoundsi32 Zhao et al. doi:10.1107/S1600536811014310 Acta Cryst. (2011). E67, i32Acta Crystallographica Section EStructure ReportsOnlineISSN 1600-5368supporting informationsup-1Acta Cryst. (2011). E67, i32 supporting informationActa Cryst. (2011). E67, i32 [doi:10.1107/S1600536811014310]RbSn2(PO4)3, a NASICON-type phosphateDan Zhao, FeiFei Li, Shen Qiu, Jiali Jiao and Junran RenS1. Comment In recent years, the AM2(PO4)3 (A = alkali metal; M = Ti, Zr, Ge, Sn) family with NASICON (Na3Zr2Si2PO12; Boilot et al., 1987) -type structures attracted a growing interest due to their intriguing properities, e.g. ionic conductivity of the A cations located in the voids of the three-dimensional NASICON-type framework. This framework is composed of isolated PO4 tetrahedra sharing corners with MO6 octahedra (Fig. 1), and is amenable to a wide variety of chemical substitutions at the various crystallographic positions, thus yielding a large number of closely related compounds, such as NaFeNb(PO4)3 (Zatovskii et al., 2006), Rb2Ca2(SO4)3 (Boujelben et al., 2007) or Al0.5Nb1.5(PO4)3 (Zhao et al., 2011). In order to augment this family of compounds, we prepared crystals of the compound RbSn2(PO4)3 using a solid state reaction route. Unlike the analogous Ti compound RbTi2(PO4)3 which crystallises in space group R3c (Duhlev, 1994), RbSn2(PO4)3 crystallises in space group R3.A projection of the crystal structure of RbSn2(PO4)3 is given in Fig. 2. It is characterized by the presence of isolated PO4 tetrahedra (1 symmetry) and two different SnO6 octahedra (both 3. symmetry), linked by sharing corner O atoms, to establish a three-dimensional 3∞[Sn2(PO4)3]- framework. This framwork delimits two types of channels in which the twelve-coordinate Rb+ atoms (site symmetry 3.) are located to compensate the negative charges. The PO4 tetrahedra are quite regular, with P–O distances ranging from 1.523 (4) to 1.537 (4) Å. The two SnO6 octahedra exhibit Sn—O distances ranging from 2.015 (4) to 2.033 (4) Å.S2. Experimental Single crystals of RbSn2(PO4)3 have been prepared by a high-temperature method in air. A powder mixture of RbNO3, SnO2 and NH4H2PO4 in the molar ratio of Rb: Sn: P = 10: 1: 15 was first ground in an agate mortar and then transferred to a platinum crucible. The sample was gradually heated in air at 1173 K for 24 h. After that, the intermediate product was slowly cooled to 673 K at the rate of 2 K h-1. It was kept at 673 K for another 10 h and then quenched to room temperature. The obtained crystals were colorless with a prismatic shape.S3. Refinement The RbSn2(PO4)3 crystal studies was twinned by merohedry. For refinement the twin law (0 1 0 1 0 0 0 0 1) was used; the twin component ratio refined to 0.503: 0.497. The highest peak in the difference electron density map is at a distance of 1.38 Å from Rb2 while the deepest hole is at a distance of 1.77 Å from O2.supporting informationsup-2Acta Cryst. (2011). E67, i32 Figure 1The expanded asymmetric unit of RbSn2(PO4)3 showing the coordination environments of the P and Sn atoms. The displacement ellipsoids are drawn at the 50% probability level. [Symmetry codes: (i) -y, x-y, z; (ii) -x + y, -x, z; (iii) 1 - y, x-y, z; (iv) 1 - x + y, 1 - x, z; (v) 1 - x, 1 - y, -z; (vi) 1 + x-y, x, -z; (vii) y, -x + y, -z; (Viii) -1/3 + y, 1/3 - x + y, 1/3 - z; (ix) 2/3 - x, 1/3 - y, 1/3 - z; (x) -1/3 + x-y, -2/3 + x, 1/3 - z.] supporting informationsup-3Acta Cryst. (2011). E67, i32 Figure 2View of the crystal structure of RbSn2(PO4)3 along [100]. PO4 and SnO6 units are given in the polyhedral representation. rubidium ditin(IV) tris(phosphate) Crystal data RbSn2(PO4)3Mr = 607.76Trigonal, R3Hall symbol: -R 3a = 8.340 (4) Åc = 24.007 (8) ÅV = 1446.1 (6) Å3Z = 6F(000) = 1668Dx = 4.187 Mg m−3Mo Kα radiation, λ = 0.71073 ÅCell parameters from 1316 reflectionsθ = 2.6–27.5°µ = 10.76 mm−1T = 293 KPrism, colourless0.20 × 0.05 × 0.05 mmData collection Rigaku Mercury70 CCD diffractometerRadiation source: fine-focus sealed tubeGraphite monochromatorDetector resolution: 14.6306 pixels mm-1ω scansAbsorption correction: multi-scan (ABSCOR; Higashi, 1995)Tmin = 0.222, Tmax = 0.6153765 measured reflections742 independent reflections711 reflections with I > 2σ(I)Rint = 0.036θmax = 27.5°, θmin = 2.6°h = −9→10k = −10→10l = −29→31Refinement Refinement on F2Least-squares matrix: fullR[F2 > 2σ(F2)] = 0.026wR(F2) = 0.043S = 1.16742 reflections57 parameters0 restraintsPrimary atom site location: structure-invariant direct methodssupporting informationsup-4Acta Cryst. (2011). E67, i32 Secondary atom site location: difference Fourier mapw = 1/[σ2(Fo2) + (0.0097P)2 + 13.5872P] where P = (Fo2 + 2Fc2)/3(Δ/σ)max < 0.001Δρmax = 0.65 e Å−3Δρmin = −0.73 e Å−3Special 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 (Å2) x y z Uiso*/UeqSn1 0.6667 0.3333 −0.01707 (2) 0.00467 (15)Rb1 0.3333 0.6667 0.1667 0.0164 (3)P1 0.3780 (2) 0.3319 (3) 0.08383 (7) 0.0058 (2)O1 0.2172 (6) 0.1463 (5) 0.10332 (14) 0.0090 (9)Sn2 0.0000 0.0000 0.15528 (2) 0.00490 (15)Rb2 0.0000 0.0000 0.0000 0.0227 (4)O2 0.4497 (6) 0.2928 (6) 0.03015 (16) 0.0119 (10)O3 0.3083 (6) 0.4664 (6) 0.07059 (16) 0.0093 (9)O4 0.5248 (6) 0.4207 (6) 0.12987 (14) 0.0103 (10)Atomic displacement parameters (Å2) U11 U22 U33 U12 U13 U23Sn1 0.0051 (2) 0.0051 (2) 0.0039 (3) 0.00253 (11) 0.000 0.000Rb1 0.0221 (5) 0.0221 (5) 0.0051 (5) 0.0111 (2) 0.000 0.000P1 0.0046 (8) 0.0068 (6) 0.0050 (6) 0.0022 (7) 0.0000 (6) 0.0008 (5)O1 0.008 (2) 0.008 (2) 0.0097 (17) 0.0028 (17) 0.0044 (15) 0.0025 (14)Sn2 0.0055 (2) 0.0055 (2) 0.0037 (3) 0.00275 (11) 0.000 0.000Rb2 0.0304 (6) 0.0304 (6) 0.0073 (6) 0.0152 (3) 0.000 0.000O2 0.009 (2) 0.018 (2) 0.009 (2) 0.008 (2) 0.0020 (17) −0.0029 (17)O3 0.014 (2) 0.010 (2) 0.0064 (17) 0.0077 (19) −0.0023 (16) 0.0001 (16)O4 0.011 (2) 0.008 (2) 0.0100 (17) 0.003 (2) −0.0050 (17) −0.0005 (16)Geometric parameters (Å, º) Sn1—O2i 2.015 (4) P1—Rb2 3.595 (2)Sn1—O2ii 2.015 (4) O1—Sn2 2.029 (4)Sn1—O2 2.015 (4) O1—Rb2 2.952 (4)Sn1—O3iii 2.033 (4) Sn2—O1xii 2.029 (4)Sn1—O3iv 2.033 (4) Sn2—O1xiii 2.029 (4)Sn1—O3v 2.033 (4) Sn2—O4xiv 2.033 (4)Sn1—Rb1vi 3.5915 (13) Sn2—O4xv 2.033 (4)supporting informationsup-5Acta Cryst. (2011). E67, i32 Rb1—O3vii 2.794 (4) Sn2—O4viii 2.033 (4)Rb1—O3viii 2.794 (4) Sn2—Rb2 3.7278 (13)Rb1—O3ix 2.794 (4) Rb2—O1xvi 2.952 (4)Rb1—O3 2.793 (4) Rb2—O1xii 2.952 (4)Rb1—O3x 2.794 (4) Rb2—O1xvii 2.952 (4)Rb1—O3xi 2.794 (4) Rb2—O1iv 2.952 (4)Rb1—O4vii 3.289 (5) Rb2—O1xiii 2.952 (4)Rb1—O4x 3.288 (5) Rb2—O2xvii 3.375 (5)Rb1—O4ix 3.288 (5) Rb2—O2xvi 3.375 (5)Rb1—O4viii 3.288 (5) Rb2—O2xii 3.375 (5)Rb1—O4xi 3.288 (5) Rb2—O2iv 3.375 (5)Rb1—O4 3.288 (5) Rb2—O2xiii 3.375 (5)P1—O2 1.523 (4) Rb2—O2 3.376 (5)P1—O1 1.529 (4) O3—Sn1v 2.034 (4)P1—O3 1.533 (4) O4—Sn2xiv 2.033 (4)P1—O4 1.537 (4)O2i—Sn1—O2ii 91.47 (17) Rb2—P1—Rb1 121.07 (4)O2i—Sn1—O2 91.47 (17) P1—O1—Sn2 149.8 (3)O2ii—Sn1—O2 91.47 (17) P1—O1—Rb2 101.98 (17)O2i—Sn1—O3iii 83.62 (17) Sn2—O1—Rb2 95.11 (15)O2ii—Sn1—O3iii 102.00 (17) O1—Sn2—O1xii 86.16 (16)O2—Sn1—O3iii 165.74 (17) O1—Sn2—O1xiii 86.16 (16)O2i—Sn1—O3iv 102.00 (17) O1xii—Sn2—O1xiii 86.16 (16)O2ii—Sn1—O3iv 165.74 (17) O1—Sn2—O4xiv 93.48 (16)O2—Sn1—O3iv 83.62 (17) O1xii—Sn2—O4xiv 89.54 (16)O3iii—Sn1—O3iv 84.32 (17) O1xiii—Sn2—O4xiv 175.70 (16)O2i—Sn1—O3v 165.74 (17) O1—Sn2—O4xv 175.70 (16)O2ii—Sn1—O3v 83.62 (17) O1xii—Sn2—O4xv 93.48 (16)O2—Sn1—O3v 102.00 (17) O1xiii—Sn2—O4xv 89.54 (16)O3iii—Sn1—O3v 84.32 (17) O4xiv—Sn2—O4xv 90.80 (16)O3iv—Sn1—O3v 84.32 (17) O1—Sn2—O4viii 89.54 (16)O2i—Sn1—Rb1vi 124.22 (12) O1xii—Sn2—O4viii 175.70 (16)O2ii—Sn1—Rb1vi 124.22 (12) O1xiii—Sn2—O4viii 93.48 (16)O2—Sn1—Rb1vi 124.22 (12) O4xiv—Sn2—O4viii 90.80 (16)O3iii—Sn1—Rb1vi 50.81 (11) O4xv—Sn2—O4viii 90.80 (16)O3iv—Sn1—Rb1vi 50.81 (11) O1—Sn2—Rb2 52.06 (11)O3v—Sn1—Rb1vi 50.81 (11) O1xii—Sn2—Rb2 52.06 (11)O3vii—Rb1—O3viii 58.49 (13) O1xiii—Sn2—Rb2 52.06 (11)O3vii—Rb1—O3ix 58.49 (13) O4xiv—Sn2—Rb2 124.70 (11)O3viii—Rb1—O3ix 58.49 (13) O4xv—Sn2—Rb2 124.69 (11)O3vii—Rb1—O3 180.0 O4viii—Sn2—Rb2 124.69 (11)O3viii—Rb1—O3 121.51 (13) O1xvi—Rb2—O1xii 180.0 (3)O3ix—Rb1—O3 121.51 (13) O1xvi—Rb2—O1xvii 56.00 (13)O3vii—Rb1—O3x 121.51 (13) O1xii—Rb2—O1xvii 124.00 (13)O3viii—Rb1—O3x 121.51 (13) O1xvi—Rb2—O1iv 56.00 (13)O3ix—Rb1—O3x 180.0 O1xii—Rb2—O1iv 124.00 (13)O3—Rb1—O3x 58.49 (13) O1xvii—Rb2—O1iv 56.00 (13)supporting informationsup-6Acta Cryst. (2011). E67, i32 O3vii—Rb1—O3xi 121.51 (13) O1xvi—Rb2—O1xiii 124.00 (13)O3viii—Rb1—O3xi 180.0 O1xii—Rb2—O1xiii 56.00 (13)O3ix—Rb1—O3xi 121.51 (13) O1xvii—Rb2—O1xiii 124.00 (13)O3—Rb1—O3xi 58.49 (13) O1iv—Rb2—O1xiii 180.00 (17)O3x—Rb1—O3xi 58.49 (13) O1xvi—Rb2—O1 124.00 (13)O3vii—Rb1—O4vii 47.14 (10) O1xii—Rb2—O1 56.00 (13)O3viii—Rb1—O4vii 75.80 (10) O1xvii—Rb2—O1 180.0O3ix—Rb1—O4vii 105.07 (10) O1iv—Rb2—O1 124.00 (13)O3—Rb1—O4vii 132.87 (10) O1xiii—Rb2—O1 56.00 (13)O3x—Rb1—O4vii 74.93 (10) O1xvi—Rb2—O2xvii 94.20 (11)O3xi—Rb1—O4vii 104.20 (10) O1xii—Rb2—O2xvii 85.80 (11)O3vii—Rb1—O4x 104.20 (11) O1xvii—Rb2—O2xvii 44.81 (10)O3viii—Rb1—O4x 74.93 (10) O1iv—Rb2—O2xvii 95.50 (10)O3ix—Rb1—O4x 132.86 (10) O1xiii—Rb2—O2xvii 84.50 (10)O3—Rb1—O4x 75.80 (11) O1—Rb2—O2xvii 135.19 (10)O3x—Rb1—O4x 47.14 (10) O1xvi—Rb2—O2xvi 44.81 (10)O3xi—Rb1—O4x 105.07 (10) O1xii—Rb2—O2xvi 135.19 (10)O4vii—Rb1—O4x 66.94 (5) O1xvii—Rb2—O2xvi 95.50 (10)O3vii—Rb1—O4ix 75.80 (11) O1iv—Rb2—O2xvi 94.20 (11)O3viii—Rb1—O4ix 105.07 (10) O1xiii—Rb2—O2xvi 85.80 (11)O3ix—Rb1—O4ix 47.14 (10) O1—Rb2—O2xvi 84.50 (10)O3—Rb1—O4ix 104.20 (11) O2xvii—Rb2—O2xvi 115.54 (5)O3x—Rb1—O4ix 132.87 (10) O1xvi—Rb2—O2xii 135.19 (10)O3xi—Rb1—O4ix 74.93 (10) O1xii—Rb2—O2xii 44.81 (10)O4vii—Rb1—O4ix 113.06 (5) O1xvii—Rb2—O2xii 84.50 (10)O4x—Rb1—O4ix 180.0 O1iv—Rb2—O2xii 85.80 (11)O3vii—Rb1—O4viii 105.07 (10) O1xiii—Rb2—O2xii 94.20 (11)O3viii—Rb1—O4viii 47.14 (10) O1—Rb2—O2xii 95.50 (10)O3ix—Rb1—O4viii 75.80 (11) O2xvii—Rb2—O2xii 64.46 (5)O3—Rb1—O4viii 74.93 (10) O2xvi—Rb2—O2xii 180.00 (19)O3x—Rb1—O4viii 104.20 (11) O1xvi—Rb2—O2iv 95.50 (10)O3xi—Rb1—O4viii 132.87 (10) O1xii—Rb2—O2iv 84.50 (10)O4vii—Rb1—O4viii 113.06 (5) O1xvii—Rb2—O2iv 94.20 (11)O4x—Rb1—O4viii 66.94 (5) O1iv—Rb2—O2iv 44.81 (10)O4ix—Rb1—O4viii 113.06 (5) O1xiii—Rb2—O2iv 135.19 (10)O3vii—Rb1—O4xi 74.93 (10) O1—Rb2—O2iv 85.80 (11)O3viii—Rb1—O4xi 132.86 (10) O2xvii—Rb2—O2iv 115.54 (5)O3ix—Rb1—O4xi 104.20 (11) O2xvi—Rb2—O2iv 115.54 (5)O3—Rb1—O4xi 105.08 (10) O2xii—Rb2—O2iv 64.46 (5)O3x—Rb1—O4xi 75.80 (11) O1xvi—Rb2—O2xiii 84.50 (10)O3xi—Rb1—O4xi 47.14 (10) O1xii—Rb2—O2xiii 95.50 (10)O4vii—Rb1—O4xi 66.94 (5) O1xvii—Rb2—O2xiii 85.80 (11)O4x—Rb1—O4xi 113.06 (5) O1iv—Rb2—O2xiii 135.19 (10)O4ix—Rb1—O4xi 66.94 (5) O1xiii—Rb2—O2xiii 44.81 (10)O4viii—Rb1—O4xi 180.0 O1—Rb2—O2xiii 94.20 (11)O3vii—Rb1—O4 132.86 (10) O2xvii—Rb2—O2xiii 64.46 (5)O3viii—Rb1—O4 104.20 (10) O2xvi—Rb2—O2xiii 64.46 (5)O3ix—Rb1—O4 74.92 (10) O2xii—Rb2—O2xiii 115.54 (5)supporting informationsup-7Acta Cryst. (2011). E67, i32 O3—Rb1—O4 47.14 (10) O2iv—Rb2—O2xiii 180.0 (2)O3x—Rb1—O4 105.08 (10) O1xvi—Rb2—O2 85.80 (11)O3xi—Rb1—O4 75.80 (10) O1xii—Rb2—O2 94.20 (11)O4vii—Rb1—O4 180.0 O1xvii—Rb2—O2 135.19 (10)O4x—Rb1—O4 113.06 (5) O1iv—Rb2—O2 84.50 (10)O4ix—Rb1—O4 66.94 (5) O1xiii—Rb2—O2 95.50 (10)O4viii—Rb1—O4 66.94 (5) O1—Rb2—O2 44.81 (10)O4xi—Rb1—O4 113.06 (5) O2xvii—Rb2—O2 180.0O2—P1—O1 106.4 (3) O2xvi—Rb2—O2 64.47 (5)O2—P1—O3 108.3 (2) O2xii—Rb2—O2 115.53 (5)O1—P1—O3 110.1 (3) O2iv—Rb2—O2 64.46 (5)O2—P1—O4 114.1 (2) O2xiii—Rb2—O2 115.54 (5)O1—P1—O4 110.6 (2) P1—O2—Sn1 148.8 (3)O3—P1—O4 107.4 (2) P1—O2—Rb2 85.6 (2)O2—P1—Rb2 69.43 (19) Sn1—O2—Rb2 125.48 (17)O1—P1—Rb2 53.44 (15) P1—O3—Sn1v 144.2 (3)O3—P1—Rb2 86.57 (16) P1—O3—Rb1 108.91 (19)O4—P1—Rb2 162.60 (19) Sn1v—O3—Rb1 94.85 (15)O2—P1—Rb1 147.0 (2) P1—O4—Sn2xiv 134.6 (3)O1—P1—Rb1 103.79 (16) P1—O4—Rb1 88.59 (19)O3—P1—Rb1 47.30 (15) Sn2xiv—O4—Rb1 128.46 (15)O4—P1—Rb1 66.10 (17)Symmetry codes: (i) −y+1, x−y, z; (ii) −x+y+1, −x+1, z; (iii) x−y+1, x, −z; (iv) y, −x+y, −z; (v) −x+1, −y+1, −z; (vi) x+1/3, y−1/3, z−1/3; (vii) −x+2/3, −y+4/3, −z+1/3; (viii) y−1/3, −x+y+1/3, −z+1/3; (ix) x−y+2/3, x+1/3, −z+1/3; (x) −x+y, −x+1, z; (xi) −y+1, x−y+1, z; (xii) −x+y, −x, z; (xiii) −y, x−y, z; (xiv) −x+2/3, −y+1/3, −z+1/3; (xv) x−y−1/3, x−2/3, −z+1/3; (xvi) x−y, x, −z; (xvii) −x, −y, −z.

RbSn2(PO4)3, a NASICON-type phosphate

Acta Cryst. E67, i23. inorganic compounds i32 Zhao et al. doi:10.1107/S1600536811014310 Acta Cryst.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) x y z Uiso*/Ueq Sn1

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RbSn2(PO4)3, a NASICON-type phosphate

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