#------------------------------------------------------------------------------
#$Date: 2009-11-18 16:56:34 +0200 (Wed, 18 Nov 2009) $
#$Revision: 858 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9000984.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_9000984
_space_group_IT_number           155
_symmetry_space_group_name_Hall  'R 3 2"'
_symmetry_space_group_name_H-M   'R 3 2 :H'
_[local]_cod_cif_authors_sg_H-M  'R 3 2'
loop_
_publ_author_name
'Dollase W A'
'Reeder R J'
_publ_section_title
;
 Crystal structure refinement of huntite, CaMg3(CO3)4, with X-ray powder data
;
_journal_name_full               'American Mineralogist'
_journal_page_first              163
_journal_page_last               166
_journal_volume                  71
_journal_year                    1986
_chemical_formula_sum            'C4 Ca Mg3 O12'
_[local]_cod_chemical_formula_sum_orig 'Ca Mg3 C4 O12'
_chemical_name_mineral           Huntite
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_length_a                   9.5027
_cell_length_b                   9.5027
_cell_length_c                   7.8212
_cell_volume                     611.643
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,-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
_atom_site_U_iso_or_equiv
Ca 0.00000 0.00000 0.00000 0.01191
Mg 0.54430 0.00000 0.00000 0.01191
C1 0.00000 0.00000 0.50000 0.01191
C2 0.45350 0.00000 0.50000 0.01191
O1 0.86630 0.00000 0.50000 0.01191
O2 0.58950 0.00000 0.50000 0.01191
O3 0.45690 0.13550 0.51610 0.01191