data_global
_chemical_name_mineral 'Chondrodite'
loop_
_publ_author_name
'Ottolini L'
'Camara F'
'Bigi S'
_journal_name_full 'American Mineralogist'
_journal_volume 85 
_journal_year 2000
_journal_page_first 89
_journal_page_last 102
_publ_section_title
;
 An investigation of matrix effects in the analysis of fluorine in humite-group
 minerals by EMPA, SIMS, and SREF
 Sample: Chond HV-43 n.3
;
_database_code_amcsd 0002339
_chemical_formula_sum 'Si2 Mg5 O8.76 F1.24 H.76'
_cell_length_a 4.7230
_cell_length_b 10.2584
_cell_length_c 7.8504
_cell_angle_alpha 109.076
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 359.468
_exptl_crystal_density_diffrn      3.161
_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
Si   0.07656   0.14403   0.70374   1.00000   0.00443
Mg1   0.50000   0.00000   0.50000   1.00000   0.00659
Mg2   0.00943   0.17358   0.30654   1.00000   0.00621
Mg3   0.49214   0.88645   0.07927   1.00000   0.00621
O1   0.77761   0.00156   0.29407   1.00000   0.00583
O2   0.72731   0.24074   0.12567   1.00000   0.00532
O3   0.22439   0.16824   0.52798   1.00000   0.00519
O4   0.26401   0.85487   0.29478   1.00000   0.00494
F5   0.26227   0.05742   0.10053   0.62000   0.00861
O5   0.26227   0.05742   0.10053   0.38000   0.00861
H   0.14300   0.02400   0.02100   0.38000   0.04800