#------------------------------------------------------------------------------
#$Date: 2013-05-09 16:53:25 +0300 (Thu, 09 May 2013) $
#$Revision: 86000 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/01/55/9015571.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_9015571
loop_
_publ_author_name
'Steadman, R.'
'Nuttall, P. M.'
_publ_section_title
;
 The crystal structure of amesite
 Note: polytype 6R
;
_journal_name_full               'Acta Crystallographica'
_journal_page_first              510
_journal_page_last               511
_journal_volume                  15
_journal_year                    1962
_chemical_compound_source        'Saranovskaye, USSR'
_chemical_formula_sum            'Al2 H4 Mg2 O9 Si'
_chemical_name_mineral           Amesite
_space_group_IT_number           146
_symmetry_space_group_name_Hall  'R 3'
_symmetry_space_group_name_H-M   'R 3 :H'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_length_a                   5.31
_cell_length_b                   5.31
_cell_length_c                   42.1
_cell_volume                     1028.020
_database_code_amcsd             0018742
_exptl_crystal_density_diffrn    2.701
_[local]_cod_cif_authors_sg_H-M  'R 3'
_[local]_cod_chemical_formula_sum_orig 'Mg2 Al2 Si O9 H4'
_cod_database_code               9015571
loop_
_space_group_symop_operation_xyz
x,y,z
2/3+x,1/3+y,1/3+z
1/3+x,2/3+y,2/3+z
-y,x-y,z
2/3-y,1/3+x-y,1/3+z
1/3-y,2/3+x-y,2/3+z
-x+y,-x,z
2/3-x+y,1/3-x,1/3+z
1/3-x+y,2/3-x,2/3+z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
MgY1 0.33300 0.00000 0.24500 0.66700
AlY1 0.33300 0.00000 0.24500 0.33300
MgY2 0.66700 0.00000 0.07800 0.66600
AlY2 0.66700 0.00000 0.07800 0.33400
SiX1 0.00000 0.00000 0.51400 0.50000
AlX1 0.00000 0.00000 0.51400 0.50000
SiX2 0.00000 0.00000 0.84700 0.50000
AlX2 0.00000 0.00000 0.84700 0.50000
SiX3 0.00000 0.00000 0.34700 0.50000
AlX3 0.00000 0.00000 0.34700 0.50000
SiX4 0.00000 0.00000 0.68100 0.50000
AlX4 0.00000 0.00000 0.68100 0.50000
O1 0.00000 0.00000 0.55400 1.00000
O2 0.00000 0.00000 0.88700 1.00000
O3 0.00000 0.00000 0.38700 1.00000
O4 0.00000 0.00000 0.72100 1.00000
O5 0.55000 0.00000 0.16700 1.00000
O6 0.45000 0.00000 0.00000 1.00000
O-H1 0.66700 0.00000 0.26900 1.00000
O-H2 0.33300 0.00000 0.10200 1.00000
O-H3 0.00000 0.00000 0.22100 1.00000
O-H4 0.00000 0.00000 0.05400 1.00000