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xi2004

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warlen(½ð±Ò+2,VIP+0):3q 2-18 09:12
guopeng8372(½ð±Ò+10,VIP+0):·Ç³£¸Ðл Å£ÈË 2-18 11:39
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Originally posted by guopeng8372 at 2009-2-17 22:13:
ÇóCrB4µÄcifÎļþ

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data_24353-ICSD
#?2008 by Fachinformationszentrum Karlsruhe, and the U.S. Secretary of
#Commerce on behalf of the United States.  All rights reserved.
_database_code_ICSD                24353
_audit_creation_date               1980/01/01
_audit_update_record               2006/10/01
_chemical_name_systematic          'Chromium Boride (1/4)'
_chemical_formula_structural       'Cr B4'
_chemical_formula_sum              'B4 Cr1'
_publ_section_title                'The crystal structure of Cr B4'
loop_
_citation_id
_citation_journal_abbrev
_citation_year
_citation_journal_volume
_citation_page_first
_citation_page_last
_citation_journal_id_ASTM
primary 'Acta Chemica Scandinavica (1-27,1973-42,1988)' 1968 22 3103 3110 ACSAA4
_publ_author_name                  'Andersson, S.;Lundstroem, T.'
_cell_length_a                     4.7441(3)
_cell_length_b                     5.4773(3)
_cell_length_c                     2.8659(1)
_cell_angle_alpha                  90.
_cell_angle_beta                   90.
_cell_angle_gamma                  90.
_cell_volume                       74.47
_cell_formula_units_Z              2
_symmetry_space_group_name_H-M     'I m m m'
_symmetry_Int_Tables_number        71
_refine_ls_R_factor_all            .071
loop_
_symmetry_equiv_pos_site_id
_symmetry_equiv_pos_as_xyz
  1        'x, y, -z'
  2        'x, -y, z'
  3        '-x, y, z'
  4        '-x, -y, -z'
  5        '-x, -y, z'
  6        '-x, y, -z'
  7        'x, -y, -z'
  8        'x, y, z'
  9        'x+.5, y+.5, -z+.5'
10        'x+.5, -y+.5, z+.5'
11        '-x+.5, y+.5, z+.5'
12        '-x+.5, -y+.5, -z+.5'
13        '-x+.5, -y+.5, z+.5'
14        '-x+.5, y+.5, -z+.5'
15        'x+.5, -y+.5, -z+.5'
16        'x+.5, y+.5, z+.5'
loop_
_atom_type_symbol
_atom_type_oxidation_number
B0+        0
Cr0+        0
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
_atom_site_B_iso_or_equiv
Cr1 Cr0+ 2 a 0 0 0 1. 0 0.18
B1 B0+ 8 n 0.1751(37) 0.3455(40) 0 1. 0 0.51

#End of data_24353-ICSD
xi2004-emuch@163.com
2Â¥2009-02-17 22:39:04
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xi2004

ÖÁ×ðľ³æ (Ö°Òµ×÷¼Ò)

¡ï
warlen(½ð±Ò+1,VIP+0):ûµÄ˵ÁË£¡ 2-18 09:12
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xi2004-emuch@163.com
3Â¥2009-02-17 23:50:43
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xi2004

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¡ï
warlen(½ð±Ò+1,VIP+0):3q 2-18 09:12
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xi2004-emuch@163.com
4Â¥2009-02-17 23:51:28
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