data_global
_chemical_name_mineral 'Sklodowskite'
loop_
_publ_author_name
'Mokeeva V I'
_journal_name_full 'Soviet Physics Doklady'
_journal_volume 4 
_journal_year 1959
_journal_page_first 27
_journal_page_last 29
_publ_section_title
;
 The crystal structure of sklodowskite
;
_database_code_amcsd 0015594
_chemical_formula_sum 'Mg U2 Si2 O16 H8'
_cell_length_a 16.74
_cell_length_b 7.01
_cell_length_c 6.59
_cell_angle_alpha 90
_cell_angle_beta 96
_cell_angle_gamma 90
_cell_volume 769.083
_exptl_crystal_density_diffrn      3.543
_symmetry_space_group_name_H-M 'I 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  '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,y,-z'
  '1/2-x,1/2+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
Mg   0.00000   0.00000   0.50000
U   0.25900   0.00000   0.11500
Si   0.21900   0.00000   0.58800
OSi1   0.27300   0.00000   0.80000
OSi2   0.12500   0.00000   0.62500
OSi3   0.24000   0.18700   0.44200
OU1   0.14300   0.00000   0.03800
OU2   0.37300   0.00000   0.18900
Wat   0.02700   0.20800   0.30400