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*data for ICSD #84268 Coll Code 84268 Rec Date 1999/01/19 Mod Date 2008/08/01 Chem Name Dipotassium Octabismuth Selenide - Beta Structured K2 Bi8 Se13 Sum Bi8 K2 Se13 ANX A2B8X13 D(calc) 6.79 Title High thermopower and low thermal conductivity in semiconducting ternary K - Bi - Se compounds. Synthesis and properties of beta-(K2 Bi8 Se13) and K2.5 Bi8.5 Se14 and their Sb analogues Author(s) Chung, D.-Y.;Choi, K.-S.;Iordanidis, L.;Schindler, J.L.;Brazis, P.W.;Kannewurf, C.R.;Chen, B.-X.;Hu, S.-Q.;Uher, C.;Kanatzidis, M.G. Reference Chemistry of Materials (1,1989- (1997), 9, 3060-3071 Unit Cell 17.4920(30) 4.205(1) 18.461(4) 90. 90.49(2) 90. Vol 1357.83 Z 2 Space Group P 1 21/m 1 SG Number 11 Cryst Sys monoclinic Pearson mP46 Wyckoff e23 R Value .067 Red Cell P 4.205 17.492 18.461 90.49 90 90 1357.828 Trans Red 0.000 -1.000 0.000 / -1.000 0.000 0.000 / 0.000 0.000 -1.000 Comments AE (Bi8= Bi, K; K2= K, Bi): Bi1-8: Se6; K2: Se8; K3: Se9; Se1: Bi4; Se2,6,8: Bi3; Se3: Bi5 K; Se4,11: Bi3 K2; Se5: Bi5; Se7,13: Bi6; Se9: Bi K4; Se10: Bi2 K3; Se12: Bi4 K Structure type prototype : K2Bi8Se13 Temperature in Kelvin: 298 Structure type : K2Bi8Se13 X-ray diffraction from single crystal Atom # OX SITE x y z SOF H Bi 1 +3 2 e 0.9192(2) 0.25 0.0785(3) 1. 0 Bi 2 +3 2 e 0.1729(2) 0.25 0.1239(3) 1. 0 Bi 3 +3 2 e 0.3273(2) 0.75 -.0184(2) 1. 0 Bi 4 +3 2 e 0.8938(2) 0.25 0.4761(3) 1. 0 Bi 5 +3 2 e 0.6954(2) 0.75 0.4509(2) 1. 0 Bi 6 +3 2 e 0.0145(2) 0.75 0.2524(2) 1. 0 Bi 7 +3 2 e 0.4939(2) 0.25 0.3882(2) 1. 0 Bi 8 +3 2 e 0.2936(4) 0.75 0.3281(6) 0.62 0 K 1 +1 2 e 0.2936(4) 0.75 0.3281(6) 0.38 0 Se 1 -2 2 e 0.9829(5) 0.75 0.4039(6) 1. 0 Se 2 -2 2 e 0.8981(5) 0.25 0.2264(6) 1. 0 Se 3 -2 2 e 0.8058(5) 0.75 0.0596(7) 1. 0 Se 4 -2 2 e 0.3885(5) 0.25 0.2773(7) 1. 0 Se 5 -2 2 e 0.8098(5) 0.75 0.5582(7) 1. 0 Se 6 -2 2 e 0.7709(4) 0.25 0.3711(6) 1. 0 Se 7 -2 2 e 0.9570(5) 0.25 -.0924(6) 1. 0 Se 8 -2 2 e 0.1334(5) 0.25 0.2660(6) 1. 0 Se 9 -2 2 e 0.3664(5) 0.75 0.8361(6) 1. 0 Se 10 -2 2 e 0.4261(4) 0.25 0.0106(6) 1. 0 Se 11 -2 2 e 0.5764(5) 0.75 0.3224(6) 1. 0 Se 12 -2 2 e 0.2776(4) 0.75 0.1493(7) 1. 0 Se 13 -2 2 e 0.6077(5) 0.25 0.5358(6) 1. 0 K 2 +1 2 e 0.2677(6) 0.25 0.7898(8) 0.62 0 Bi 9 +3 2 e 0.2677(6) 0.25 0.7898(8) 0.38 0 K 3 +1 2 e 0.510(2) 0.25 0.844(2) 1. 0 *end for ICSD #84268 *data for ICSD #72976 Coll Code 72976 Rec Date 1994/06/30 Chem Name Potassium Bismuth Selenide (2/8/13) Structured K2 Bi8 Se13 Sum Bi8 K2 Se13 ANX A2B8X13 D(calc) 6.72 Title Molten salt synthesis and properties of three new solid state ternary bismuth chalcogenides, beta-CsBiS2, gamma-CsBiS2 and K2Bi8Se13 Author(s) McCarthy, T.J.;Ngeyi, S.-P.;Liao, J.-H.;DeGroot, D.C.;Hogan, T.;Kannewurf, C.R.;Kanatzidis, M.G. Reference Chemistry of Materials (1,1989- (1993), 5, 331-340 Unit Cell 13.768(2) 12.096(3) 4.1656(6) 89.98(1) 98.64(1) 87.96(1) Vol 685.41 Z 1 Space Group P -1 SG Number 2 Cryst Sys triclinic Pearson aP23 Wyckoff i11 c R Value .082 Red Cell P 4.165 12.096 13.768 92.039 98.64 90.019 685.411 Trans Red 0.000 0.000 1.000 / 0.000 -1.000 0.000 / 1.000 0.000 0.000 Comments The structure has been assigned a PDF number (calculated powder diffraction data): 01-081-1570 Temperature in Kelvin: 296 X-ray diffraction from single crystal Atom # OX SITE x y z SOF H K 1 +1 2 i 0.831(1) 0.051(2) 0.415(4) 1. 0 Bi 1 +3 2 i 0.8809(2) 0.3803(3) 0.4408(6) 1. 0 Bi 2 +3 2 i 0.3787(2) 0.5464(3) 0.1887(7) 1. 0 Bi 3 +3 2 i 0.1510(2) 0.2940(3) 0.0758(6) 1. 0 Bi 4 +3 2 i 0.5628(2) 0.8671(3) 0.2822(7) 1. 0 Se 1 -2 2 i 0.2625(5) 0.4267(7) 0.632(2) 1. 0 Se 2 -2 2 i 0.0370(5) 0.1977(7) 0.516(2) 1. 0 Se 3 -2 2 i 0.7788(5) 0.2707(7) 0.887(2) 1. 0 Se 4 -2 2 i 0.5094(5) 0.3536(7) 0.254(2) 1. 0 Se 5 -2 2 i 0.2811(5) 0.1169(7) 0.140(2) 1. 0 Se 6 -2 2 i 0.5837(5) 0.0886(7) 0.293(2) 1. 0 Se 7 -2 1 c 0 0.5 0 1. 0 Lbl Type U11 U22 U33 U12 U13 U23 K1 K1+ 0.04(1) 0.02(1) 0.05(1) -.018(9) 0.004(8) 0.01(1) Bi1 Bi3+ 0.016(1) 0.023(2) 0.019(1) -.001(1) 0.001(1) 0.000(1) Bi2 Bi3+ 0.018(1) 0.024(2) 0.018(1) 0.000(1) 0.002(1) 0.000(1) Bi3 Bi3+ 0.017(1) 0.024(2) 0.018(1) 0.000(1) 0.002(1) -.002(1) Bi4 Bi3+ 0.028(1) 0.018(2) 0.022(1) 0.000(1) 0.004(1) 0.001(1) Se1 Se2- 0.021(3) 0.018(5) 0.022(4) 0.001(4) 0.002(3) -.003(3) Se2 Se2- 0.016(3) 0.030(6) 0.017(4) -.005(4) -.001(3) 0.001(4) Se3 Se2- 0.023(4) 0.015(6) 0.025(4) 0.001(4) 0.002(3) -.003(4) Se4 Se2- 0.021(4) 0.022(6) 0.017(4) -.002(4) -.002(3) -.004(4) Se5 Se2- 0.020(3) 0.012(5) 0.023(4) 0.005(3) 0.001(3) 0.002(3) Se6 Se2- 0.016(3) 0.018(5) 0.018(3) 0.002(3) 0.002(3) 0.001(3) Se7 Se2- 0.019(5) 0.011(7) 0.017(5) -.004(5) 0.002(4) 0.000(5) *end for ICSD #72976 |
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