data_global
_chemical_name_mineral 'Diopside'
loop_
_publ_author_name
'Tribaudino M'
'Nestola F'
'Meneghini C'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 43 
_journal_year 2005
_journal_page_first 1411
_journal_page_last 1421
_publ_section_title
;
 Rietveld refinement of clinopyroxenes with intermediate
 Ca-content along the join diopside-enstatite
 Sample: Di70En30
;
_database_code_amcsd 0006052
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Ca.7 Mg1.3 Si2 O6'
_cell_length_a 9.7264
_cell_length_b 8.9133
_cell_length_c 5.2485
_cell_angle_alpha 90
_cell_angle_beta 106.742
_cell_angle_gamma 90
_cell_volume 435.728
_exptl_crystal_density_diffrn      3.229
_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
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Ca2   0.00000   0.28850   0.25000   0.70000   0.01444
Mg2   0.00000   0.28850   0.25000   0.30000   0.01444
Mg1   0.00000   0.90530   0.25000   1.00000   0.00595
Si   0.28957   0.09409   0.23870   1.00000   0.00494
O1   0.11741   0.08969   0.14680   1.00000   0.00646
O2   0.36522   0.25009   0.33370   1.00000   0.00443
O3   0.35009   0.01811   0.00300   1.00000   0.00823