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#$Date: 2008-03-10 10:25:41 +0200 (Mon, 10 Mar 2008) $
#$Revision: 255 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9001390.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_9001390
loop_
_publ_author_name
'Hughes J M'
'Cameron M'
'Crowley K D'
_publ_section_title
;
 Ordering of divalent cations in the apatite structure: Crystal structure
 refinements of natural Mn- and Sr-bearing apatite
 sample Mn.42
;
_journal_name_full               'American Mineralogist'
_journal_page_first              1857
_journal_page_last               1862
_journal_volume                  76
_journal_year                    1991
_chemical_formula_sum            'Ca4.791 Mn.211 P3 O12 F.93'
_chemical_name_mineral           Fluorapatite
_symmetry_space_group_name_H-M   'P 63/m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_length_a                   9.3596
_cell_length_b                   9.3596
_cell_length_c                   6.8603
_cell_volume                     520.461
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 0.66667 0.33333 0.00155 0.91800 0.01049
Mn1 0.66667 0.33333 0.00155 0.08300 0.01049
Ca2 -0.00704 0.24157 0.25000 0.98500 0.00951
Mn2 -0.00704 0.24157 0.25000 0.01500 0.00951
P 0.36937 0.39843 0.25000 1.00000 0.00726
O1 0.48590 0.32730 0.25000 1.00000 0.01229
O2 0.46660 0.58820 0.25000 1.00000 0.01634
O3 0.25750 0.34140 0.07070 1.00000 0.01760
F 0.00000 0.00000 0.25000 0.93000 0.02368