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kathyyxy

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2Â¥: Originally posted by ÐÝÃß»ðɽ at 2014-06-13 23:06:48
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 ...

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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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