#------------------------------------------------------------------------------
#$Date: 2008-03-10 10:25:41 +0200 (Mon, 10 Mar 2008) $
#$Revision: 255 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9004033.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_9004033
loop_
_publ_author_name
'Nestola F'
'Gatta G D'
'Ballaran T B'
_publ_section_title
;
 The effect of Ca substitution on the elastic and
 structural behavior of orthoenstatite
 Locality: synthetic sample
 Sample: P = 6.25 GPa
;
_journal_name_full               'American Mineralogist'
_journal_page_first              809
_journal_page_last               815
_journal_volume                  91
_journal_year                    2006
_chemical_formula_sum            'Mg1.93 Ca.07 Si2 O6'
_chemical_name_mineral           Enstatite
_symmetry_space_group_name_H-M   'P b c a'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_length_a                   18.022
_cell_length_b                   8.6578
_cell_length_c                   5.085
_cell_volume                     793.417
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
x,1/2-y,1/2+z
-x,1/2+y,1/2-z
1/2-x,1/2+y,z
1/2+x,1/2-y,-z
1/2+x,y,1/2-z
1/2-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
MgM2 0.37790 0.48110 0.35300 0.93000 0.01200
CaM2 0.37790 0.48110 0.35300 0.07000 0.01200
MgM1 0.37620 0.65660 0.85760 1.00000 0.00700
SiA 0.27050 0.34370 0.03760 1.00000 0.00510
SiB 0.47360 0.33820 0.80420 1.00000 0.00640
O1A 0.18210 0.34070 0.02370 1.00000 0.00700
O2A 0.30920 0.50570 0.03550 1.00000 0.00300
O3A 0.30350 0.22180 0.81470 1.00000 0.00800
O1B 0.56280 0.33950 0.81340 1.00000 0.01000
O2B 0.43320 0.48470 0.68610 1.00000 0.00600
O3B 0.44580 0.19170 0.60850 1.00000 0.01300
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
MgM2 0.00900 0.01200 0.01400 0.00100 0.00300 -0.00500
CaM2 0.00900 0.01200 0.01400 0.00100 0.00300 -0.00500
MgM1 0.00800 0.00600 0.00600 -0.00100 -0.00300 0.00500