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#$Date: 2024-04-25 17:59:02 +0300 (Thu, 25 Apr 2024) $
#$Revision: 291351 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/00/31/9003109.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_9003109
loop_
_publ_author_name
'Nestola, F.'
'Tribaudino, M.'
'Ballaran, T. B.'
_publ_section_title
;High pressure behavior, transformation and crystal structure of synthetic
 iron-free pigeonite Sample: P = 2.6 GPa
;
_journal_name_full               'American Mineralogist'
_journal_page_first              189
_journal_page_last               196
_journal_volume                  89
_journal_year                    2004
_chemical_formula_sum            'Ca0.15 Mg1.85 O6 Si2'
_chemical_name_mineral           Pigeonite
_space_group_IT_number           14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_cell_angle_alpha                90
_cell_angle_beta                 108.12
_cell_angle_gamma                90
_cell_length_a                   9.546
_cell_length_b                   8.732
_cell_length_c                   5.149
_cell_formula_units_Z            4
_cell_volume                     407.913
_database_code_amcsd             0003198
_diffrn_ambient_pressure         2.6e+06
_exptl_crystal_density_diffrn    3.308
_cod_original_formula_sum        'Mg1.85 Ca.15 Si2 O6'
_cod_database_code               9003109
loop_
_space_group_symop_operation_xyz
x,y,z
x,1/2-y,1/2+z
-x,1/2+y,1/2-z
-x,-y,-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
MgM2 0.01170 0.01920 0.01100 0.00620 0.00530 0.00400
CaM2 0.01170 0.01920 0.01100 0.00620 0.00530 0.00400
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
MgM2 0.25620 0.01960 0.22020 0.85000 0.01393
CaM2 0.25620 0.01960 0.22020 0.15000 0.01393
MgM1 0.25040 0.65520 0.22160 1.00000 0.00950
SiTA 0.04220 0.34150 0.28620 1.00000 0.00836
SiTB 0.55200 0.83870 0.22810 1.00000 0.00912
O1A 0.86560 0.33940 0.18200 1.00000 0.01001
O2A 0.12060 0.50340 0.31900 1.00000 0.00887
O3A 0.10540 0.27480 0.60000 1.00000 0.01267
O1B 0.37350 0.83830 0.12650 1.00000 0.01013
O2B 0.62930 0.98610 0.38200 1.00000 0.01646
O3B 0.60620 0.69860 0.45800 1.00000 0.01140
loop_
_cod_related_entry_id
_cod_related_entry_database
_cod_related_entry_code
1 AMCSD 0003198
