data_global
_chemical_name_mineral 'Chondrodite'
loop_
_publ_author_name
'Gibbs G V'
'Ribbe P H'
'Anderson C P'
_journal_name_full 'American Mineralogist'
_journal_volume 55
_journal_year 1970
_journal_page_first 1182
_journal_page_last 1194
_publ_section_title
;
 The crystal structures of the humite minerals. II. Chondrodite
;
_database_code_amcsd 208
_chemical_formula_sum 'Mg4.95 Fe.05 Si2 O8.7 (F1.3 H.7)'
_cell_length_a 4.7284
_cell_length_b 10.2539
_cell_length_c 7.8404
_cell_angle_alpha 109.059
_cell_angle_beta 90.0
_cell_angle_gamma 90.0
_cell_volume 359.3
_exptl_crystal_density_diffrn  3.178
_symmetry_space_group_name_H-M 'P 21/b 1 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-x,1/2+y,z'
  '1/2+x,1/2-y,-z'
  '-x,-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
Mg1   0.5  0.0  0.5  0.95  0.00621
Fe1   0.5  0.0  0.5  0.05  0.00621
Mg2   0.0091  0.1731  0.3055  1.0  0.0057
Mg3   0.4915  0.8867  0.0791  1.0  0.00545
Si   0.0768  0.1441  0.7038  1.0  0.00253
O1   0.7787  0.0009  0.2937  1.0  0.00456
O2   0.728  0.2404  0.1252  1.0  0.00507
O3   0.2255  0.1682  0.5275  1.0  0.00443
O4   0.2649  0.8546  0.2943  1.0  0.00532
O-H   0.2656  0.0582  0.1018  0.35  0.00633
F   0.2656  0.0582  0.1018  0.65  0.00633