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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/9/00/59/9005923.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_9005923
loop_
_publ_author_name
'Ghose, S.'
'Ito, Y.'
'Hatch, D. M.'
_publ_section_title
;
 Paraelectric-antiferroelectric phase transition in titanite, CaTiSiO5
 I. A high temperature X-ray diffraction study of the order parameter
 and transition mechanism
 Sample: T = 400 K
;
_journal_name_full               'Physics and Chemistry of Minerals'
_journal_page_first              591
_journal_page_last               603
_journal_volume                  17
_journal_year                    1991
_chemical_formula_sum            'Ca O5 Si Ti'
_chemical_name_mineral           Titanite
_space_group_IT_number           14
_symmetry_space_group_name_Hall  '-P 2yab'
_symmetry_space_group_name_H-M   'P 1 21/a 1'
_cell_angle_alpha                90
_cell_angle_beta                 113.804
_cell_angle_gamma                90
_cell_length_a                   7.0730
_cell_length_b                   8.7374
_cell_length_c                   6.5716
_cell_formula_units_Z            4
_cell_volume                     371.574
_database_code_amcsd             0007505
_diffrn_ambient_temperature      400
_exptl_crystal_density_diffrn    3.504
_cod_original_formula_sum        'Ca Ti Si O5'
_cod_database_code               9005923
loop_
_space_group_symop_operation_xyz
x,y,z
1/2+x,1/2-y,z
1/2-x,1/2+y,-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
Ca 0.02758 0.00878 0.01203 -0.00049 -0.00077 -0.00120
Ti 0.01271 0.00913 0.00707 0.00115 0.00209 -0.00096
Si 0.00573 0.00321 0.00496 0.00054 0.00101 0.00059
O1 0.00823 0.00967 0.01725 -0.00034 0.00635 0.00040
O2A 0.01555 0.01303 0.00462 0.00097 0.00059 -0.00037
O2B 0.01411 0.01238 0.00949 0.00054 0.00396 0.00093
O3A 0.01375 0.00920 0.01214 0.00189 0.00568 0.00202
O3B 0.01404 0.00762 0.01119 0.00261 0.00593 0.00197
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Ca 0.24380 0.41870 0.25110
Ti 0.51140 0.25330 0.74970
Si 0.74880 0.43270 0.24930
O1 0.74870 0.32130 0.74810
O2A 0.91020 0.31600 0.43460
O2B 0.08790 0.18480 0.06390
O3A 0.38290 0.46060 0.64660
O3B 0.61840 0.03950 0.85240
loop_
_cod_related_entry_id
_cod_related_entry_database
_cod_related_entry_code
1 AMCSD 0007505
