#------------------------------------------------------------------------------
#$Date: 2024-04-18 17:56:43 +0200 (jue 18 de abr de 2024) $
#$Revision: 291269 $
#$URL: svn://www.crystallography.net/cod/cif/9/00/00/9000028.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided the American Mineralogist Crystal Structure Database,
# http://rruff.geo.arizona.edu/AMS/amcsd.php
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_9000028
loop_
_publ_author_name
'Ramsdell, L. S.'
_publ_section_title
;
 The crystal structure of alpha-SiC, type IV
;
_journal_name_full               'American Mineralogist'
_journal_page_first              431
_journal_page_last               442
_journal_volume                  29
_journal_year                    1944
_chemical_formula_sum            'C7 Si7'
_chemical_name_common            SiC-IV
_space_group_IT_number           160
_symmetry_space_group_name_Hall  'R 3 -2"'
_symmetry_space_group_name_H-M   'R 3 m :H'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_length_a                   3.073
_cell_length_b                   3.073
_cell_length_c                   52.78
_cell_formula_units_Z            3
_cell_volume                     431.643
_database_code_amcsd             0000031
_exptl_crystal_density_diffrn    3.239
_cod_original_sg_symbol_H-M      'R 3 m'
_cod_original_formula_sum        'Si7 C7'
_cod_database_code               9000028
_amcsd_formula_title             SiC-IV
loop_
_space_group_symop_operation_xyz
x,y,z
2/3+x,1/3+y,1/3+z
1/3+x,2/3+y,2/3+z
x,x-y,z
2/3+x,1/3+x-y,1/3+z
1/3+x,2/3+x-y,2/3+z
-y,-x,z
2/3-y,1/3-x,1/3+z
1/3-y,2/3-x,2/3+z
-x+y,y,z
2/3-x+y,1/3+y,1/3+z
1/3-x+y,2/3+y,2/3+z
-y,x-y,z
2/3-y,1/3+x-y,1/3+z
1/3-y,2/3+x-y,2/3+z
-x+y,-x,z
2/3-x+y,1/3-x,1/3+z
1/3-x+y,2/3-x,2/3+z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Si 0.00000 0.00000 0.00000
Si 0.00000 0.00000 0.19100
Si 0.00000 0.00000 0.28600
Si 0.00000 0.00000 0.42900
Si 0.00000 0.00000 0.57100
Si 0.00000 0.00000 0.71400
Si 0.00000 0.00000 0.81000
C 0.00000 0.00000 0.03600
C 0.00000 0.00000 0.22600
C 0.00000 0.00000 0.32100
C 0.00000 0.00000 0.46400
C 0.00000 0.00000 0.60700
C 0.00000 0.00000 0.75000
C 0.00000 0.00000 0.84500
loop_
_cod_related_entry_id
_cod_related_entry_database
_cod_related_entry_code
1 AMCSD 0000031
