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*data for   ICSD #23664
Coll Code   23664
Rec  Date   1980/01/01
Mod  Date   2003/04/01
Chem Name   Tricalcium Bis(borate)
Structured  Ca3 (B O3)2
Sum         B2 Ca3 O6
ANX         A2B3X6
Min Name    Takedaite
D(calc)     3.1
Title       Zur Kristallstruktur des Calcium-Borates Ca3 (B O3)2
Author(s)   Schuckmann, W.
Reference   Neues Jahrbuch fuer Mineralogie. Monatshefte (Band=Jahr) (1950-)
            (1969), 1969, 142-143
Unit Cell   8.631(3) 8.631(3) 11.855(4) 90. 90. 120.
Vol         764.81
Z           6
Space Group R -3 c H
SG Number   167
Cryst Sys   trigonal/rhombohedral
Pearson     hR22
Wyckoff     f e c
R Value     .024
Red Cell    RH 6.359 6.359 6.359 85.462 85.462 85.462 254.937
Trans Red   0.333 -0.333 -0.333 / -0.667 -0.333 -0.333 / 0.333 0.667 -0.333
Comments    Compound with mineral name: Takedaite
            The structure has been assigned a PDF number (calculated
            powder diffraction data): 01-073-1203
            The structure has been assigned a PDF number (experimental
            powder diffraction data): 48-1885
            Structure type : Ca3(BO3)2
            X-ray diffraction from single crystal
Atom  #   OX   SITE      x           y           z           SOF      H
Ca   1  +2    18 e  0.35086(3)  0           0.25           1.         0   
B    1  +3    12 c  0           0           0.1178(2)      1.         0   
O    1  -2    36 f  0.1658(1)   0.0127(1)   0.11509(8)     1.         0   
Lbl  Type   Beta11      Beta22      Beta33      Beta12      Beta13      Beta23
Ca1  Ca2+  0.00178(2)  0.00222(3)  0.00136(2)  0.00111(2)  0.00016(1)  0.00033(2)  
B1   B3+   0.00233(18) 0.00233(18) 0.00101(10) 0.00117(9)  0           0           
O1   O2-   0.00235(8)  0.00281(9)  0.00225(5)  0.00148(7)  -.00059(5)  -.00010(5)  
*end for    ICSD #23664
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