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#$Date: 2013-05-05 17:21:46 +0300 (Sun, 05 May 2013) $
#$Revision: 85285 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/00/84/9008437.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_9008437
loop_
_publ_author_name
'Hejny, C.'
'Armbruster, T.'
_publ_section_title
;
 Polytypism in xonotlite Ca6Si6O17(OH)2
 Note: polytype derived from structure in Kudoh and Takeuchi (1979)
 Locality: model structure, not experimentally determined
;
_journal_name_full               'Zeitschrift fur Kristallographie'
_journal_page_first              396
_journal_page_last               408
_journal_volume                  216
_journal_year                    2001
_chemical_formula_sum            'Ca6 O19 Si6'
_chemical_name_mineral           Xonotlite
_space_group_IT_number           15
_symmetry_space_group_name_Hall  '-A 2ya'
_symmetry_space_group_name_H-M   'A 1 2/a 1'
_cell_angle_alpha                90
_cell_angle_beta                 90.36
_cell_angle_gamma                90
_cell_length_a                   17.032
_cell_length_b                   7.363
_cell_length_c                   14.023
_cell_volume                     1758.542
_exptl_crystal_density_diffrn    2.693
_[local]_cod_chemical_formula_sum_orig 'Ca6 Si6 O19'
_cod_database_code               9008437
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
x,1/2+y,1/2+z
1/2+x,-y,z
1/2+x,1/2-y,1/2+z
1/2-x,y,-z
1/2-x,1/2+y,1/2-z
-x,-y,-z
-x,1/2-y,1/2-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Ca1 0.27300 0.87550 0.75230
Ca2 0.06680 0.13110 0.66840
Ca3 0.06930 0.61910 0.67070
Si1 0.10590 0.16410 0.38410
Si2 0.10590 0.58600 0.38430
Si3 0.15910 0.87520 0.52810
O1 0.25000 0.37500 0.00000
O2 0.10950 0.37560 0.42110
O3 0.17560 0.63010 0.30960
O4 0.17170 0.12010 0.30870
O5 0.11490 0.05420 0.48600
O6 0.11470 0.69650 0.48580
O7 0.02120 0.62760 0.33260
O8 0.02150 0.12230 0.33700
O9 0.14940 0.87590 0.63900
O10 0.14890 0.37370 0.63470