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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/9/00/38/9003855.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_9003855
loop_
_publ_author_name
'Domeneghetti, M. C.'
'Zema, M.'
'Tazzoli, V.'
_publ_section_title
;
 Kinetics of Fe2+-Mg order-disorder in P2_1/c pigeonite
 Sample: N.13, annealed at T = 650 C for t = 80 min
;
_journal_name_full               'American Mineralogist'
_journal_page_first              1816
_journal_page_last               1823
_journal_paper_doi               10.2138/am.2005.1773
_journal_volume                  90
_journal_year                    2005
_chemical_compound_source        'Parana, Brazil'
_chemical_formula_sum
'Al0.016 Ca0.19 Fe0.852 Mg0.915 Mn0.029 Na0.003 O6 Si1.984 Ti0.01'
_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                 108.515
_cell_angle_gamma                90
_cell_length_a                   9.7096
_cell_length_b                   8.9413
_cell_length_c                   5.2473
_cell_formula_units_Z            4
_cell_volume                     431.973
_database_code_amcsd             0003979
_exptl_crystal_density_diffrn    3.564
_exptl_crystal_thermal_history   'annealed at T = 650 C for t = 80 min'
_cod_original_formula_sum
'Mg.915 Fe.852 Ca.19 Mn.029 Na.003 Ti.01 Si1.984 Al.016 O6'
_cod_database_code               9003855
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_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
MgM2A 0.25519 0.01698 0.22849 0.14630 ?
FeM2A 0.25519 0.01698 0.22849 0.63410 ?
CaM2A 0.25519 0.01698 0.22849 0.06780 ?
MnM2A 0.25519 0.01698 0.22849 0.02620 ?
NaM2A 0.25519 0.01698 0.22849 0.00290 ?
CaM2B 0.25324 0.04870 0.25180 0.12270 0.01454
MgM1 0.25047 0.65468 0.23239 0.76880 ?
Fe2+M1 0.25047 0.65468 0.23239 0.20330 ?
Fe3+M1 0.25047 0.65468 0.23239 0.01500 ?
TiM1 0.25047 0.65468 0.23239 0.01000 ?
MnM1 0.25047 0.65468 0.23239 0.00290 ?
SiA 0.04276 0.34048 0.27577 1.00000 ?
SiB 0.54937 0.83752 0.23915 0.98400 ?
AlB 0.54937 0.83752 0.23915 0.01600 ?
O1A 0.86762 0.33810 0.16793 1.00000 ?
O2A 0.12175 0.49932 0.33270 1.00000 ?
O3A 0.10424 0.26129 0.57679 1.00000 ?
O1B 0.37359 0.83658 0.13529 1.00000 ?
O2B 0.62887 0.98786 0.37218 1.00000 ?
O3B 0.60491 0.70934 0.48099 1.00000 ?
loop_
_cod_related_entry_id
_cod_related_entry_database
_cod_related_entry_code
1 AMCSD 0003979
