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XRD&SEM qq2978260443
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data for ICSD #79704 Coll Code 79704 Rec Date 1996/10/14 Chem Name Strontium Undecaoxotetratantalate Structured Sr Ta4 O11 Sum O11 Sr1 Ta4 ANX AB4X11 D(calc) 7.85 Title Sr Ta4 O11 : a Rietveld refinement using neutron powder diffraction data Author(s) Heunen, G.W.J.C.;Ijdo, D.J.W.;Helmholdt, R.B. Reference Acta Crystallographica C (39,1983-) (1995), 51, 1723-1725 Unit Cell 6.2543(1) 6.2543(1) 12.3320(3) 90. 90. 120. Vol 417.76 Z 2 Space Group P 63 2 2 SG Number 182 Cryst Sys hexagonal Pearson hP32 Wyckoff i g2 f d c R Value .024 Red Cell P 6.254 6.254 12.332 90 90 119.999 417.755 Trans Red 1.000 0.000 0.000 / 0.000 1.000 0.000 / 0.000 0.000 1.000 Comments Neutron diffraction (powder) The structure has been assigned a PDF number (calculated powder diffraction data): 01-083-0608 Rietveld profile refinement applied Temperature in Kelvin: 295 Structure type : CaTa4O11 At least one temperature factor is implausible or meaningless but agrees with the value given in the paper. Atom # OX SITE x y z SOF H ITF(B) Sr 1 +2 2 d 0.6667 0.3333 0.25 1. 0 0.17(8) Ta 1 +5 2 c 0.3333 0.6667 0.25 1. 0 0.20(7) Ta 2 +5 6 g 0.3570(2) 0 0 1. 0 0.14(3) O 1 -2 4 f 0.3333 0.6667 0.5347(1) 1. 0 0.22(6) O 2 -2 6 g 0.7532(2) 0 0 1. 0 0.53(5) O 3 -2 12 i 0.3701(2) 0.4315(2) 0.3454(1) 1. 0 0.47(4) *end for ICSD #79704 |
2Â¥2014-06-13 23:06:48
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3Â¥2014-06-14 08:07:19














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