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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/9/9001562.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_9001562
loop_
_publ_author_name
'Della Ventura G'
'Robert J-L'
'Beny J-M'
'Raudsepp M'
'Hawthorne F C'
_publ_section_title
;
 The OH-F substitution in Ti-rich potassium richterite: Rietveld structure
 refinement and FTIR and micro-Raman spectroscopic studies of synthetic
 amphiboles in the system K2O-Na2O-CaO-MgO-SiO2-TiO2-H2O-HF
 Sample Rich62
 Atomic parameters from ICSD
;
_journal_name_full               'American Mineralogist'
_journal_page_first              980
_journal_page_last               987
_journal_volume                  78
_journal_year                    1993
_chemical_formula_sum            'O22.4 F1.6 Si7.76 Ti.24 Mg5 (Na Ca) K H.92'
_chemical_name_mineral           Richterite
_symmetry_space_group_name_H-M   'C 1 2/m 1'
_cell_angle_alpha                90
_cell_angle_beta                 104.908
_cell_angle_gamma                90
_cell_length_a                   10.0166
_cell_length_b                   18.0189
_cell_length_c                   5.2871
_cell_volume                     922.138
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
1/2+x,1/2+y,z
x,-y,z
1/2+x,1/2-y,z
-x,y,-z
1/2-x,1/2+y,-z
-x,-y,-z
1/2-x,1/2-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
O1 0.11040 0.08860 0.21620 1.00000 0.01013
O2 0.11680 0.16970 0.72480 1.00000 0.01013
O-H 0.10250 0.00000 0.71640 0.20000 0.01013
F 0.10250 0.00000 0.71640 0.80000 0.01013
O4 0.35630 0.24700 0.79330 1.00000 0.01013
O5 0.33610 0.12940 0.09480 1.00000 0.01393
O6 0.33610 0.11660 0.58970 1.00000 0.01393
O7 0.33400 0.00000 0.31960 1.00000 0.01520
Si1 0.27640 0.08460 0.29850 1.00000 0.00507
Si2 0.28150 0.17040 0.81020 0.94000 0.00507
Ti 0.28150 0.17040 0.81020 0.06000 0.00507
Mg1 0.00000 0.09030 0.50000 1.00000 0.00760
Mg2 0.00000 0.17960 0.00000 1.00000 0.00760
Mg3 0.00000 0.00000 0.00000 1.00000 0.00760
Na 0.00000 0.27570 0.50000 0.50000 0.01140
Ca 0.00000 0.27570 0.50000 0.50000 0.01140
K 0.02500 0.50000 0.05760 0.50000 0.02913