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543220835(½ð±Ò+5): ¶àлÁË£¬Õâ¸öÎÒÖªµÀµÄ£¬¾ÍÊǰÑCifµ¼µ½DiamondÀïʱ£¬³öÀ´µÄ¾§ÌåͼÐβ»ÊǺܺã¬×Ô¼º²»»á±à¼­ 2011-07-08 15:53:24
data_29093-ICSD
#?2008 by Fachinformationszentrum Karlsruhe, and the U.S. Secretary of
#Commerce on behalf of the United States.  All rights reserved.
_database_code_ICSD                29093
_audit_creation_date               1980/01/01
_audit_update_record               2007/04/01
_chemical_name_systematic          'Boron(I) Carbide'
_chemical_formula_structural       'B4 C'
_chemical_formula_sum              'C1 B4'
_publ_section_title
;
The crystal structure of boron carbide
;
loop_
_citation_id
_citation_journal_abbrev
_citation_year
_citation_journal_volume
_citation_page_first
_citation_page_last
_citation_journal_id_ASTM
primary 'Journal of the American Chemical Society' 1943 65 2115 2119 JACSAT
2 'Zhurnal Fizicheskoi Khimii' 1943 17 326 335 ZFKHA9
_publ_author_name                  'Clark, H.K.;Hoard, J.L.'
_cell_length_a                     5.61
_cell_length_b                     5.61
_cell_length_c                     12.14
_cell_angle_alpha                  90.
_cell_angle_beta                   90.
_cell_angle_gamma                  120.
_cell_volume                       330.88
_cell_formula_units_Z              9
_symmetry_space_group_name_H-M     'R -3 m H'
_symmetry_Int_Tables_number        166
loop_
_symmetry_equiv_pos_site_id
_symmetry_equiv_pos_as_xyz
  1        'x-y, -y, -z'
  2        '-x, -x+y, -z'
  3        'y, x, -z'
  4        'x-y, x, -z'
  5        'y, -x+y, -z'
  6        '-x, -y, -z'
  7        '-x+y, y, z'
  8        'x, x-y, z'
  9        '-y, -x, z'
10        '-x+y, -x, z'
11        '-y, x-y, z'
12        'x, y, z'
13        'x-y+.6666, -y+.3333, -z+.3333'
14        'x-y+.3333, -y+.6666, -z+.6666'
15        '-x+.6666, -x+y+.3333, -z+.3333'
16        '-x+.3333, -x+y+.6666, -z+.6666'
17        'y+.6666, x+.3333, -z+.3333'
18        'y+.3333, x+.6666, -z+.6666'
19        'x-y+.6666, x+.3333, -z+.3333'
20        'x-y+.3333, x+.6666, -z+.6666'
21        'y+.6666, -x+y+.3333, -z+.3333'
22        'y+.3333, -x+y+.6666, -z+.6666'
23        '-x+.6666, -y+.3333, -z+.3333'
24        '-x+.3333, -y+.6666, -z+.6666'
25        '-x+y+.6666, y+.3333, z+.3333'
26        '-x+y+.3333, y+.6666, z+.6666'
27        'x+.6666, x-y+.3333, z+.3333'
28        'x+.3333, x-y+.6666, z+.6666'
29        '-y+.6666, -x+.3333, z+.3333'
30        '-y+.3333, -x+.6666, z+.6666'
31        '-x+y+.6666, -x+.3333, z+.3333'
32        '-x+y+.3333, -x+.6666, z+.6666'
33        '-y+.6666, x-y+.3333, z+.3333'
34        '-y+.3333, x-y+.6666, z+.6666'
35        'x+.6666, y+.3333, z+.3333'
36        'x+.3333, y+.6666, z+.6666'
loop_
_atom_type_symbol
_atom_type_oxidation_number
B1+        1
C4-        -4
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
B1 B1+ 18 h 0.1667 -.1667 0.26 1. 0
B2 B1+ 18 h 0.106 -.106 0.113 1. 0
C1 C4- 6 c 0 0 0.385 1. 0
C2 C4- 3 b 0 0 0.5 1. 0

#End of data_29093-ICSD
3Â¥2011-07-08 09:05:40
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