#------------------------------------------------------------------------------
#$Date: 2016-02-16 14:49:47 +0200 (Tue, 16 Feb 2016) $
#$Revision: 176465 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/00/99/9009980.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_9009980
loop_
_publ_author_name
'Perdikatsis, B.'
_publ_section_title
;
 X-ray powder diffraction study of francolite by the Rietveld method
 Locality: Epirus, Greece
 Sample: T = 750 C
 Note: Reported structure does not reproduce reported formula or bondlengths
;
_journal_name_full               'Materials Science Forum'
_journal_page_first              809
_journal_page_last               814
_journal_volume                  79
_journal_year                    1991
_chemical_formula_sum            'Ca2.108 F0.171 O8.817 P1.362'
_chemical_name_mineral           Carbonate-fluorapatite
_space_group_IT_number           176
_symmetry_space_group_name_Hall  '-P 6c'
_symmetry_space_group_name_H-M   'P 63/m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_length_a                   9.3593
_cell_length_b                   9.3593
_cell_length_c                   6.8919
_cell_volume                     522.825
_diffrn_ambient_temperature      1023.15
_exptl_crystal_density_diffrn    1.721
_cod_original_formula_sum        'Ca2.108 P1.362 O8.817 F.171'
_cod_database_code               9009980
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-x+y,-x,1/2-z
x-y,x,1/2+z
y,-x+y,-z
-y,x-y,z
x,y,1/2-z
-x,-y,1/2+z
x-y,x,-z
-x+y,-x,z
-y,x-y,1/2-z
y,-x+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
Ca1 0.33333 0.66667 0.00020 0.32800 0.01335
Ca2 0.24140 0.99140 0.25000 0.48400 0.01035
P 0.39830 0.36890 0.25000 0.45400 0.01232
O1 0.32550 0.48380 0.25000 0.45100 0.00583
O2 0.58700 0.46260 0.25000 0.48800 0.02058
O3 0.34200 0.25650 0.06790 1.00000 0.02088
F 0.00000 0.00000 0.25000 0.17100 0.05181