data_global
_chemical_name_mineral 'Kosmochlor'
loop_
_publ_author_name
'Cameron M'
'Sueno S'
'Prewitt C T'
'Papike J J'
_journal_name_full 'American Mineralogist'
_journal_volume 58 
_journal_year 1973
_journal_page_first 594
_journal_page_last 618
_publ_section_title
;
 High-temperature crystal chemistry of acmite, diopside, hedenbergite, jadeite,
 spodumene, and ureyite
 T = 400 C
 pyroxene
;
_database_code_amcsd 0000360
_chemical_formula_sum 'Si2 Cr Na O6'
_cell_length_a 9.597
_cell_length_b 8.751
_cell_length_c 5.274
_cell_angle_alpha 90
_cell_angle_beta 107.29
_cell_angle_gamma 90
_cell_volume 422.913
_exptl_crystal_density_diffrn      3.568
_symmetry_space_group_name_H-M 'C 1 2/c 1'
loop_
_space_group_symop_operation_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   0.29200   0.09180   0.23280
Cr1   0.00000   0.90720   0.25000
Na2   0.00000   0.30010   0.25000
O1   0.11390   0.07940   0.13690
O2   0.36070   0.25710   0.30120
O3   0.35210   0.00990   0.00620
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 0.00757 0.00698 0.01569 -0.00081 0.00477 -0.00033
Cr1 0.00825 0.00757 0.01575 0.00000 0.00458 0.00000
Na2 0.03058 0.01300 0.02337 0.00000 -0.00082 0.00000
O1 0.00949 0.01207 0.01936 -0.00134 0.00650 0.00022
O2 0.01497 0.00830 0.02679 -0.00544 0.00626 -0.00491
O3 0.01378 0.01463 0.02027 0.00150 0.00655 -0.00188