#------------------------------------------------------------------------------
#$Date: 2009-11-20 13:07:27 +0200 (Fri, 20 Nov 2009) $
#$Revision: 893 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9005802.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_9005802
loop_
_publ_author_name
'Koepke J'
'Schulz H'
_publ_section_title
;
 Single crystal structure investigations under high-pressure of the
 mineral cordierite with an improved high-pressure cell
 Sample: P = 0.3 GPa
 Locality: Zabargad island, Red Sea
;
_journal_name_full               'Physics and Chemistry of Minerals'
_journal_page_first              165
_journal_page_last               173
_journal_volume                  13
_journal_year                    1986
_chemical_formula_sum            'Al4 Mg2 O18 Si5'
_chemical_name_mineral           Cordierite
_symmetry_space_group_name_H-M   'C c c m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_length_a                   17.058
_cell_length_b                   9.724
_cell_length_c                   9.336
_cell_volume                     1548.581
_diffrn_ambient_pressure         3e+05
_[local]_cod_chemical_formula_sum_orig 'Mg2 Al4 Si5 O18'
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
1/2+x,1/2+y,z
x,-y,1/2+z
1/2+x,1/2-y,1/2+z
-x,y,1/2-z
1/2-x,1/2+y,1/2-z
-x,y,1/2+z
1/2-x,1/2+y,1/2+z
x,-y,1/2-z
1/2+x,1/2-y,1/2-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_U_iso_or_equiv
Mg 0.16290 0.50000 0.25000 0.01460
Al11 0.25000 0.25000 0.24930 0.01380
Si16 0.00000 0.50000 0.25000 0.01330
Si21 0.19380 0.07780 0.00000 0.01330
Al26 0.05010 0.30730 0.00000 0.00960
Si23 -0.13540 0.23760 0.00000 0.01170
O11 0.24830 0.10380 0.14160 0.01250
O16 0.06110 0.41670 0.15090 0.01720
O13 -0.17370 0.30880 0.14240 0.02090
O21 0.12230 0.18800 0.00000 0.02170
O26 -0.04400 0.25150 0.00000 0.00920
O23 -0.16460 0.07930 0.00000 0.01530