#------------------------------------------------------------------------------
#$Date: 2024-05-02 11:48:35 +0100 (Thu, 02 May 2024) $
#$Revision: 291455 $
#$URL: svn://www.crystallography.net/cod/cif/9/00/76/9007687.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_9007687
loop_
_publ_author_name
'Maslen, E. N.'
'Streltsov, V. A.'
'Streltsova, N. R.'
_publ_section_title
;
 X-ray study of the electron density in calcite, CaCO3
;
_journal_issue                   4
_journal_name_full               'Acta Crystallographica, Section B'
_journal_page_first              636
_journal_page_last               641
_journal_paper_doi               10.1107/S0108768193002575
_journal_volume                  49
_journal_year                    1993
_chemical_formula_sum            'C Ca O3'
_chemical_name_mineral           Calcite
_space_group_IT_number           167
_symmetry_space_group_name_Hall  '-R 3 2"c'
_symmetry_space_group_name_H-M   'R -3 c :H'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_length_a                   4.991
_cell_length_b                   4.991
_cell_length_c                   17.062
_cell_formula_units_Z            6
_cell_volume                     368.074
_exptl_crystal_density_diffrn    2.709
_cod_duplicate_entry             2100992
_cod_original_sg_symbol_H-M      'R -3 c'
_cod_original_formula_sum        'Ca C O3'
_cod_database_code               9007687
loop_
_symmetry_equiv_pos_as_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,1/2+z
2/3+x,1/3+x-y,5/6+z
1/3+x,2/3+x-y,1/6+z
y,x,1/2-z
2/3+y,1/3+x,5/6-z
1/3+y,2/3+x,1/6-z
-x+y,y,1/2+z
2/3-x+y,1/3+y,5/6+z
1/3-x+y,2/3+y,1/6+z
-x,-x+y,1/2-z
2/3-x,1/3-x+y,5/6-z
1/3-x,2/3-x+y,1/6-z
-y,-x,1/2+z
2/3-y,1/3-x,5/6+z
1/3-y,2/3-x,1/6+z
x-y,-y,1/2-z
2/3+x-y,1/3-y,5/6-z
1/3+x-y,2/3-y,1/6-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
-x,-y,-z
2/3-x,1/3-y,1/3-z
1/3-x,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_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Ca 0.01024 0.01024 0.00980 0.00512 0.00000 0.00000
C 0.00910 0.00910 0.01060 0.00455 0.00000 0.00000
O 0.01150 0.02220 0.01950 0.01110 -0.00400 -0.00800
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Ca 0.00000 0.00000 0.00000
C 0.00000 0.00000 0.25000
O 0.25730 0.00000 0.25000