data_global
_chemical_name_mineral 'Hedenbergite'
loop_
_publ_author_name
'Heuer M'
'Huber A L'
'Bromiley G D'
'Fehr K T'
'Bente K'
_journal_name_full 'Physics and Chemistry of Minerals'
_journal_volume 32 
_journal_year 2005
_journal_page_first 552
_journal_page_last 563
_publ_section_title
;
 Characterization of synthetic hedenbergite (CaFeSi2O6)-petedunnite (CaZnSi2O6)
 solid solution series by X-ray single crystal diffraction
 Sample: hd4gb31
;
_database_code_amcsd 0009001
_chemical_formula_sum 'Ca Zn.496 Fe.504 Si2 O6'
_cell_length_a 9.8447
_cell_length_b 9.0175
_cell_length_c 5.2614
_cell_angle_alpha 90
_cell_angle_beta 105.342
_cell_angle_gamma 90
_cell_volume 450.434
_exptl_crystal_density_diffrn      3.728
_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
CaM2   0.00000   0.30028   0.25000   1.00000
ZnM1   0.00000   0.90626   0.25000   0.49610
FeM1   0.00000   0.90626   0.25000   0.50380
Si   0.28698   0.09254   0.23096   1.00000
O1   0.11790   0.08924   0.14787   1.00000
O2   0.36135   0.24721   0.32224   1.00000
O3   0.35023   0.01935   0.99344   1.00000
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
CaM2 0.01205 0.00861 0.00856 0.00000 0.00059 0.00000
ZnM1 0.00813 0.00739 0.00706 0.00000 0.00185 0.00000
FeM1 0.00813 0.00739 0.00706 0.00000 0.00185 0.00000
Si 0.00656 0.00648 0.00619 0.00009 0.00202 -0.00020
O1 0.00669 0.00933 0.00838 -0.00003 0.00173 0.00045
O2 0.01223 0.00699 0.01064 -0.00297 0.00273 -0.00072
O3 0.00865 0.01046 0.00805 -0.00060 0.00340 -0.00263