data_global
_chemical_name_mineral 'Protoferro-anthophyllite'
loop_
_publ_author_name
'Sueno S'
'Matsuura S'
'Gibbs G V'
'Boisen M B'
_journal_name_full 'Physics and Chemistry of Minerals'
_journal_volume 25 
_journal_year 1998
_journal_page_first 366
_journal_page_last 377
_publ_section_title
;
 A crystal chemical study of protoanthophyllite:
 orthoamphiboles with the protoamphibole structure
 Sample: PFA Hiruka Village
;
_database_code_amcsd 0008147
_chemical_formula_sum 'Fe6.5 Mg.1 Mn.4 Si8 O24 H2'
_cell_length_a 9.388
_cell_length_b 18.387
_cell_length_c 5.347
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 922.984
_exptl_crystal_density_diffrn      3.591
_symmetry_space_group_name_H-M 'P n m n'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2-z'
  '1/2+x,1/2+y,1/2-z'
  '1/2-x,1/2-y,1/2+z'
  'x,-y,z'
  '-x,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
FeM1   0.00000   0.08826   0.50000   1.00000   0.00697
FeM2   0.00000   0.17998   0.00000   0.95000   0.00570
MgM2   0.00000   0.17998   0.00000   0.05000   0.00570
FeM3   0.00000   0.00000   0.00000   1.00000   0.00684
FeM4   0.00000   0.25880   0.50000   0.80000   0.00950
MnM4   0.00000   0.25880   0.50000   0.20000   0.00950
Si1   0.28500   0.08350   0.16350   1.00000   0.00570
Si2   0.29720   0.16670   0.66110   1.00000   0.00621
O1   0.11270   0.08810   0.16210   1.00000   0.00823
O2   0.12540   0.17410   0.66460   1.00000   0.00874
O-H3   0.11390   0.00000   0.66130   1.00000   0.00937
O4   0.11630   0.25830   0.19120   1.00000   0.01077
O5   0.34720   0.12470   0.40830   1.00000   0.01127
O6   0.34780   0.12110   0.91230   1.00000   0.01355
O7   0.33790   0.00000   0.17220   1.00000   0.01267