data_global
_chemical_name_mineral 'Manganhumite'
loop_
_publ_author_name
'Francis C A'
'Ribbe P H'
_journal_name_full 'American Mineralogist'
_journal_volume 63 
_journal_year 1978
_journal_page_first 874
_journal_page_last 877
_publ_section_title
;
 Crystal structures of the humite minerals: V. Magnesian manganhumite
;
_database_code_amcsd 0000686
_chemical_formula_sum 'Mn4.9 Mg2.1 Si3 O14 H2'
_cell_length_a 4.815
_cell_length_b 10.580
_cell_length_c 21.448
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1092.619
_exptl_crystal_density_diffrn      3.833
_symmetry_space_group_name_H-M 'P b n m'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,y,1/2-z'
  '-x,-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,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
Mn1   0.00150   0.37970   0.17580   0.70000   0.01140
Mg1   0.00150   0.37970   0.17580   0.30000   0.01140
Mn26   0.51410   0.15830   0.25000   1.00000   0.00798
Mn25   0.00850   0.09740   0.10900   1.00000   0.01178
Mg3   0.49070   0.86570   0.02700   0.75000   0.01064
Mn3   0.49070   0.86570   0.02700   0.25000   0.01064
Si1   0.07500   0.96990   0.25000   1.00000   0.00798
Si2   0.57530   0.28440   0.10430   1.00000   0.00722
O23   0.71500   0.21780   0.16590   1.00000   0.01229
O13   0.21680   0.03810   0.18960   1.00000   0.01013
O24   0.71970   0.21300   0.04470   1.00000   0.01089
O21   0.24320   0.28500   0.10290   1.00000   0.01127
O12   0.27850   0.32930   0.25000   1.00000   0.00912
O11   0.74210   0.96800   0.25000   1.00000   0.01064
O22   0.77780   0.92520   0.10310   1.00000   0.00950
O-H   0.26310   0.03060   0.03330   1.00000   0.01102