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#$Date: 2017-10-06 19:24:22 +0300 (Fri, 06 Oct 2017) $
#$Revision: 201816 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/01/61/9016161.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_9016161
loop_
_publ_author_name
'Mills, S. J.'
'Whitfield, P. S.'
'Wilson, S. A.'
'Woodhouse, J. N.'
'Dipple, G. M.'
'Raudsepp, M.'
'Francis, C. A.'
_publ_section_title
;
 The crystal structure of stichtite, re-examination of barbertonite, and the
 nature of polytypism in MgCr hydrotalcites
 Note: 3R1 polytype of stichtite
;
_journal_name_full               'American Mineralogist'
_journal_page_first              179
_journal_page_last               187
_journal_paper_doi               10.2138/am.2011.3531
_journal_volume                  96
_journal_year                    2011
_chemical_compound_source        'Tasmania, Australia'
_chemical_formula_sum            'C0.118 H3.224 Cr0.23 Mg0.77 O2.966'
_chemical_name_mineral           Stichtite
_space_group_IT_number           166
_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                   3.09552
_cell_length_b                   3.09552
_cell_length_c                   23.5042
_cell_volume                     195.049
_database_code_amcsd             0018330
_exptl_crystal_density_diffrn    2.115
_cod_original_sg_symbol_H-M      'R -3 m'
_cod_original_formula_sum        '(Mg.77 Cr.23) O2.966 H3.224 C.118'
_cod_database_code               9016161
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
-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
-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_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Mg 0.00000 0.00000 0.00000 0.77000 0.00203
Cr 0.00000 0.00000 0.00000 0.23000 0.00203
O1 0.33333 0.66667 0.37268 1.00000 0.00051
H1 0.33333 0.66667 0.41108 1.00000 0.00051
Wat2 0.12420 -0.12420 0.50000 0.10200 0.00025
CO3 0.33333 0.66667 0.50000 0.05900 0.00025
O3 0.33333 0.66667 0.50000 0.17700 0.00025
loop_
_cod_related_entry_id
_cod_related_entry_database
_cod_related_entry_code
1 AMCSD 0018330