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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/9/01/36/9013656.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_9013656
loop_
_publ_author_name
'Yang, H.'
'Konzett, J.'
'Frost, D. J.'
'Downs, R. T.'
_publ_section_title
;X-ray diffraction and Raman spectroscopic study of clinopyroxenes with
 six-coordinated Si in the Na(Mg0.5Si0.5)Si2O6 - NaAlSi2O6 system Note: Sample
 J4
;
_journal_name_full               'American Mineralogist'
_journal_page_first              942
_journal_page_last               949
_journal_volume                  94
_journal_year                    2009
_chemical_formula_structural     (Na.97Mg.03)(Mg.24Al.55Si.21)Si2O6
_chemical_formula_sum            'Al0.55 Mg0.27 Na0.97 O6 Si2.21'
_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                 107.741
_cell_angle_gamma                90
_cell_length_a                   9.4429
_cell_length_b                   8.5946
_cell_length_c                   5.2437
_cell_volume                     405.329
_exptl_crystal_density_diffrn    3.306
_[local]_cod_chemical_formula_sum_orig 'Na.97 Mg.27 Al.55 Si2.21 O6'
_cod_database_code               9013656
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
NaM2 0.01782 0.00971 0.01098 0.00000 -0.00076 0.00000
MgM2 0.01782 0.00971 0.01098 0.00000 -0.00076 0.00000
MgM1 0.00495 0.00563 0.00485 0.00000 0.00115 0.00000
AlM1 0.00495 0.00563 0.00485 0.00000 0.00115 0.00000
SiM1 0.00495 0.00563 0.00485 0.00000 0.00115 0.00000
Si 0.00562 0.00766 0.00585 -0.00005 0.00162 -0.00081
O1 0.00579 0.01709 0.01689 0.00072 0.00227 -0.00646
O2 0.01650 0.00886 0.01140 -0.00166 0.00390 -0.00078
O3 0.00951 0.01432 0.00718 0.00212 0.00262 -0.00194
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
NaM2 0.00000 0.29942 0.25000 0.97000 0.01399
MgM2 0.00000 0.29942 0.25000 0.03000 0.01399
MgM1 0.00000 0.90514 0.25000 0.24000 0.00522
AlM1 0.00000 0.90514 0.25000 0.55000 0.00522
SiM1 0.00000 0.90514 0.25000 0.21000 0.00522
Si 0.29049 0.09280 0.22964 1.00000 0.00641
O1 0.10940 0.07647 0.12911 1.00000 0.01352
O2 0.36077 0.26247 0.29617 1.00000 0.01233
O3 0.35342 0.00763 0.00784 1.00000 0.01032