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.4
;
_database_code_amcsd 0002340
_chemical_formula_sum 'Si2 Mg5 O8.76 F1.24 H.76'
_cell_length_a 4.7226
_cell_length_b 10.2564
_cell_length_c 7.8490
_cell_angle_alpha 109.076
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 359.304
_exptl_crystal_density_diffrn      3.163
_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   0.07642   0.14413   0.70375   1.00000   0.00469
Mg1   0.50000   0.00000   0.50000   1.00000   0.00646
Mg2   0.00936   0.17352   0.30652   1.00000   0.00633
Mg3   0.49218   0.88645   0.07939   1.00000   0.00633
O1   0.77749   0.00158   0.29381   1.00000   0.00608
O2   0.72730   0.24078   0.12569   1.00000   0.00570
O3   0.22456   0.16834   0.52795   1.00000   0.00570
O4   0.26413   0.85492   0.29496   1.00000   0.00532
F   0.26252   0.05756   0.10064   0.62000   0.00925
O5   0.26252   0.05756   0.10064   0.38000   0.00925
H   0.10000   0.01600   0.02300   0.38000   0.00519