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µÛ·ò(½ð±Ò+3):¸Ðл»ØÌû½»Á÷~ 2010-04-29 10:24
attdey(½ð±Ò+10):ллÁË ÄܸæËßÎÒÄãÊÇÔõô²éµ½µÄÂ𠣿 2010-04-29 20:05
*data for   ICSD #29093
Coll Code   29093
Rec  Date   1980/01/01
Mod  Date   2007/04/01
Chem Name   Boron(I) Carbide
Structured  B4 C
Sum         C1 B4
ANX         A4X
D(calc)     2.5
Title       The crystal structure of boron carbide
Author(s)   Clark, H.K.;Hoard, J.L.
Reference   Journal of the American Chemical Society
            (1943), 65, 2115-2119
            Zhurnal Fizicheskoi Khimii
            (1943), 17, 326-335
Unit Cell   5.61 5.61 12.14 90. 90. 120.
Vol         330.88
Z           9
Space Group R -3 m H
SG Number   166
Cryst Sys   trigonal/rhombohedral
Pearson     hR15
Wyckoff     h2 c b
Red Cell    RH 5.183 5.183 5.183 65.525 65.525 65.525 110.294
Trans Red   0.333 -0.333 -0.333 / -0.667 -0.333 -0.333 / 0.333 0.667 -0.333
Comments    Cell from 2nd reference: 5.63, 12.14, z(B1) was given as
            .36, cf, 23923
            AE: B1: B4 C54; B2: B5 C; Ca: B6 C2; C2: B6 C
            The structure has been assigned a PDF number (calculated
            powder diffraction data): 01-075-0424
            The structure has been assigned a PDF number (experimental
            powder diffraction data): 35-798
            Structure type prototype : B4C
            Structure type : B4C
            X-ray diffraction from single crystal
            No R value given in the paper.
            At least one temperature factor missing in the paper.
Atom  #   OX   SITE      x           y           z           SOF      H
B    1  +1    18 h  0.1667      -.1667      0.26           1.         0   
B    2  +1    18 h  0.106       -.106       0.113          1.         0   
C    1  -4    6 c   0           0           0.385          1.         0   
C    2  -4    3 b   0           0           0.5            1.         0   
*end for    ICSD #29093
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µÛ·ò(½ð±Ò+3):¸Ðл»ØÌû½»Á÷~ 2010-04-29 10:24
3Â¥2010-04-29 10:19:52
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