data_global
_chemical_name_mineral 'Sklodowskite'
loop_
_publ_author_name
'Mokeeva V I'
_journal_name_full 'Soviet Physics Crystallography'
_journal_volume 9 
_journal_year 1964
_journal_page_first 217
_journal_page_last 218
_publ_section_title
;
 The structure of sklodowskite
;
_database_code_amcsd 0015548
_chemical_formula_sum 'Mg U2 Si2 O18 H12'
_cell_length_a 16.89
_cell_length_b 7.01
_cell_length_c 6.60
_cell_angle_alpha 90
_cell_angle_beta 96.33
_cell_angle_gamma 90
_cell_volume 776.669
_exptl_crystal_density_diffrn      3.663
_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
_atom_site_U_iso_or_equiv
Mg   0.00000   0.00000   0.50000   0.03166
U   0.25700   0.00000   0.12000   0.03166
Si   0.21800   0.00000   0.57000   0.03166
OSi1   0.28000   0.00000   0.78000   0.03166
OSi2   0.12800   0.00000   0.62700   0.03166
OSi3   0.23500   0.18700   0.44000   0.03166
OU1   0.15500   0.00000   0.03500   0.03166
OU2   0.35500   0.00000   0.18500   0.03166
Wat   0.02000   0.21000   0.30000   0.03166
WatX   0.08000   0.50000   0.82000   0.03166