data_9000261
_chemical_name 'Mn2GeO4-beta'
loop_
_publ_author_name
'Morimoto N'
'Tokonami M'
'Koto K'
'Nakajima S'
_journal_name_full "American Mineralogist"
_journal_volume 57
_journal_year 1972
_journal_page_first 62
_journal_page_last 75
_publ_section_title
;
 Crystal structures of the high pressure polymorphs of Mn2GeO4
;
_chemical_formula_sum 'Mn2 Ge O4'
_cell_length_a 6.025
_cell_length_b 12.095
_cell_length_c 8.752
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 637.779
_symmetry_space_group_name_H-M 'I m m a'
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  'x,1/2-y,z'
  '1/2+x,-y,1/2+z'
  '-x,1/2+y,-z'
  '1/2-x,+y,1/2-z'
  '-x,y,z'
  '1/2-x,1/2+y,1/2+z'
  'x,-y,-z'
  '1/2+x,1/2-y,1/2-z'
  'x,1/2+y,-z'
  '1/2+x,+y,1/2-z'
  '-x,1/2-y,z'
  '1/2-x,-y,1/2+z'
  '-x,-y,-z'
  '1/2-x,1/2-y,1/2-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Mn1   0.00000   0.00000   0.00000
Mn2   0.00000   0.25000  -0.03610
Mn3   0.25000   0.12810   0.25000
Ge   0.00000   0.11920   0.61640
O1   0.00000   0.25000   0.21230
O2   0.00000   0.25000   0.71870
O3   0.00000  -0.00910   0.25460
O4   0.25880   0.12230  -0.00340