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*data for ICSD #100176 Coll Code 100176 Rec Date 1980/12/31 Mod Date 2007/08/01 Chem Name Yttrium Niobate Structured Y (Nb O4) Sum Nb1 O4 Y1 ANX ABX4 Min Name Fergusonite-beta (Y) D(calc) 5.5 Title Kristallstrukturverfeinerungen von Euxenit, Y (Nb0.5 Ti0.5)2 O6 und m- Fergusonit, Y Nb O4 Author(s) Weitzel, H.;Schroecke, H. Reference Zeitschrift fuer Kristallographie (149,1979-) (1980), 152, 69-82 Phase Transition (1992), 38, 127-220 Unit Cell 7.6454(3) 10.9994(5) 5.3172(2) 90. 138.42 90. Vol 296.76 Z 4 Space Group C 1 2/c 1 SG Number 15 Cryst Sys monoclinic Pearson mS24 Wyckoff f2 e2 R Value .018 Red Cell C 5.089 5.317 6.536 112.086 110.931 94.527 148.379 Trans Red -1.000 0.000 -1.000 / 0.000 0.000 -1.000 / 0.500 -0.500 1.000 Comments In setting I2/c: beta'=94.5?, a'=5.090, z'=z-x Stable up to 1093 K (2nd ref., Tomaszewski), above 4/m AE: Yb: 8ap O8; Nb: O4; O1,2: Yb2 Nb Compound with mineral name: Fergusonite-beta (Y) Neutron diffraction (powder) The structure has been assigned a PDF number (calculated powder diffraction data): 01-083-1319 The structure has been assigned a PDF number (experimental powder diffraction data): 23-1486 Structure type prototype : YNbO4(mS) Structure type : YNbO4(mS) Atom # OX SITE x y z SOF H ITF(B) Y 1 +3 4 e 0 0.3763(1) 0.25 1. 0 0.45(2) Nb 1 +5 4 e 0 0.8578(1) 0.25 1. 0 0.57(3) O 1 -2 8 f 0.2117(3) 0.7818(1) 0.2145(4) 1. 0 0.49(2) O 2 -2 8 f 0.2477(2) 0.9599(1) 0.6533(3) 1. 0 0.31(2) *end for ICSD #100176 |

8Â¥2012-01-28 17:19:07














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