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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/9/00/96/9009601.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_9009601
loop_
_publ_author_name
'Mottana, A.'
'Rossi, G.'
'Kracher, A.'
'Kurat, G.'
_publ_section_title
;
 Violan revisited: Mn-bearing Omphacite and Diopside
 Locality: manganese deposit of Praborna, St Marcel, Aosta Valley, Italy
;
_journal_name_full
'Tschermaks Mineralogische und Petrographische Mitteilungen'
_journal_page_first              187
_journal_page_last               201
_journal_volume                  26
_journal_year                    1979
_chemical_formula_sum            'Ca0.94 Fe0.036 Mg0.964 Na0.06 O6 Si2'
_chemical_name_mineral           Diopside
_space_group_IT_number           15
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_cell_angle_alpha                90
_cell_angle_beta                 106.1
_cell_angle_gamma                90
_cell_length_a                   9.726
_cell_length_b                   8.907
_cell_length_c                   5.256
_cell_volume                     437.466
_exptl_crystal_density_diffrn    3.290
_[local]_cod_chemical_formula_sum_orig '(Ca.94 Na.06) (Mg.964 Fe.036) Si2 O6'
_cod_database_code               9009601
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_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
Ca2 0.00867 0.00792 0.00661 0.00000 0.00033 0.00000
Na2 0.00867 0.00792 0.00661 0.00000 0.00033 0.00000
Mg1 0.00305 0.00727 0.00407 0.00000 0.00108 0.00000
Fe1 0.00305 0.00727 0.00407 0.00000 0.00108 0.00000
Si 0.00248 0.00595 0.00355 -0.00021 0.00172 -0.00032
O1 0.00296 0.01097 0.00747 0.00072 0.00227 -0.00039
O2 0.00849 0.01153 0.00722 -0.00181 0.00222 -0.00036
O3 0.00456 0.01005 0.00605 0.00025 0.00213 -0.00191
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
Ca2 0.00000 0.30167 0.25000 0.94000 0.00811
Na2 0.00000 0.30167 0.25000 0.06000 0.00811
Mg1 0.00000 0.90741 0.25000 0.96400 0.00481
Fe1 0.00000 0.90741 0.25000 0.03600 0.00481
Si 0.28653 0.09317 0.22916 1.00000 0.00380
O1 0.11503 0.08612 0.14033 1.00000 0.00697
O2 0.36063 0.25081 0.31585 1.00000 0.00798
O3 0.35074 0.01689 -0.00419 1.00000 0.00671