data_global
_chemical_name_mineral 'Ribbeite'
loop_
_publ_author_name
'Freed R L'
'Rouse R C'
'Peacor D R'
_journal_name_full 'American Mineralogist'
_journal_volume 78 
_journal_year 1993
_journal_page_first 190
_journal_page_last 194
_publ_section_title
;
 Ribbeite, a second example of edge-sharing silicate tetrahedra in the
 leucophoenicite group
;
_database_code_amcsd 0001545
_chemical_formula_sum 'Mn5 Si2 O10 H2'
_cell_length_a 10.732
_cell_length_b 15.672
_cell_length_c 4.811
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 809.171
_exptl_crystal_density_diffrn      4.046
_symmetry_space_group_name_H-M 'P n m a'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,z'
  '-x,1/2+y,-z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2-z'
  '1/2+x,y,1/2-z'
  '1/2-x,-y,1/2+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   0.86850   0.14501   0.49334   1.00000   0.01406
Mn2   0.59124   0.25000   0.51449   1.00000   0.01406
Mn3   0.64402   0.06127  -0.00408   1.00000   0.01570
Si1   0.77790   0.25000   0.07120   1.00000   0.00697
Si2   0.46130   0.04480   0.58350   0.50000   0.00823
O1   0.46160   0.04320   0.26720   1.00000   0.01545
O2   0.77780   0.25000   0.73810   1.00000   0.00925
O3   0.91790   0.25000   0.21250   1.00000   0.00988
O4   0.71010   0.16810   0.21230   1.00000   0.00950
O5   0.52860   0.13730   0.73110   1.00000   0.02001
O6   0.31090   0.04390   0.73440   1.00000   0.01735
H1   0.55500   0.12600   0.56900   0.50000   0.02153
H2   0.34500   0.03400   0.60000   0.50000   0.02533