#------------------------------------------------------------------------------
#$Date: 2009-11-20 13:07:27 +0200 (Fri, 20 Nov 2009) $
#$Revision: 893 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9000332.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_9000332
loop_
_publ_author_name
'Cameron M'
'Sueno S'
'Prewitt C T'
'Papike J J'
_publ_section_title
;
 High-temperature crystal chemistry of acmite, diopside, hedenbergite, jadeite,
 spodumene, and ureyite
 T = 400 C
 pyroxene
;
_journal_name_full               'American Mineralogist'
_journal_page_first              594
_journal_page_last               618
_journal_volume                  58
_journal_year                    1973
_chemical_formula_sum            'Ca Mg O6 Si2'
_chemical_name_mineral           Diopside
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_cell_angle_alpha                90
_cell_angle_beta                 105.94
_cell_angle_gamma                90
_cell_length_a                   9.776
_cell_length_b                   8.979
_cell_length_c                   5.267
_cell_volume                     444.554
_diffrn_ambient_temperature      673.15
_[local]_cod_chemical_formula_sum_orig 'Si2 Mg Ca O6'
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,-z
1/2-x,1/2-y,-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Si 0.28620 0.09290 0.22940
Mg1 0.00000 0.90720 0.25000
Ca2 0.00000 0.30080 0.25000
O1 0.11600 0.08680 0.14240
O2 0.36110 0.24860 0.31630
O3 0.35010 0.01650 0.99610
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
Si 0.00868 0.00894 0.01184 -0.00060 0.00159 -0.00051
Mg1 0.01276 0.01103 0.01143 0.00000 0.00157 0.00000
Ca2 0.02198 0.01189 0.01597 0.00000 -0.00128 0.00000
O1 0.00936 0.01450 0.01509 0.00013 0.00166 0.00097
O2 0.02082 0.01233 0.01801 -0.00500 0.00328 -0.00196
O3 0.01276 0.01679 0.01707 -0.00034 0.00444 -0.00415