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zj1025(½ð±Ò+5):·Ç³£¸Ðл£¡ 2010-12-25 14:55:11
µÛ·ò(½ð±Ò+1):¸ÐлÄúµÄ½»Á÷£¡ 2010-12-26 19:47:46
*data for   ICSD #64599
Coll Code   64599
Rec  Date   1989/06/19
Mod  Date   2006/04/01
Chem Name   Iron(III) Oxide - Alpha
Structured  Fe2 O3
Sum         Fe2 O3
ANX         A2X3
Min Name    Hematite
D(calc)     5.29
Title       Electron density distribution and electric field gradient in hematite
            at 153 k determined from precision X-Ray diffraction data
Author(s)   Tsirel'son, V.G.;Antipin, M.Yu.;Strel'tsov, R.P.;Ozerov,
            R.P.;Struchkov, Yu.T.
Reference   Doklady Akademii Nauk SSSR
            (1988), 298, 1137-1141
            Soviet Physics, Doklady (see: Doklady Akademii Nauk SSR)
            (1988), 33, 89-91
            Golden Book of Phase Transitions, Wroclaw
            (2002), 1, 1-123
Unit Cell   5.0285(7) 5.0285(7) 13.736(2) 90. 90. 120.
Vol         300.79
Z           6
Space Group R -3 c H
SG Number   167
Cryst Sys   trigonal/rhombohedral
Pearson     hR10
Wyckoff     e c
R Value     0.0106
Red Cell    RH 5.028 5.028 5.421 62.370 62.370 60 100.264
Trans Red   1.000 0.000 0.000 / 1.000 1.000 0.000 / 0.667 0.333 0.333
Comments    Stable above 773 K (3rd ref., Tomaszewski), below Ia3-,
            m.p. 1523 K
            Electron structure calculation
            Compound with mineral name: Hematite
            The structure has been assigned a PDF number (calculated
            powder diffraction data): 01-079-0007
            The structure has been assigned a PDF number (experimental
            powder diffraction data): 33-664
            Temperature in Kelvin: 153
            Structure type : Al2O3
            X-ray diffraction from single crystal
            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
Fe   1  +3    12 c  0           0           0.35520(1)     1.         0   
O    1  -2    18 e  0.69418(8)  0           0.25           1.         0   
Lbl  Type      B11         B22         B33         B12         B13         B23
Fe1  Fe3+  0.211(4)    0.211(4)    0.155(4)    0.105(2)    0           0           
O1   O2-   0.294(5)    0.288(7)    0.245(5)    0.144(4)    0.024(2)    0.048(4)   
*end for    ICSD #64599
2Â¥2010-12-24 22:23:44
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