data_global
_chemical_name_mineral 'Seelite'
loop_
_publ_author_name
'Bachet B'
'Brassy C'
_journal_name_full 'Acta Crystallographica, Section C'
_journal_volume 47 
_journal_year 1991
_journal_page_first 2013
_journal_page_last 2015
_publ_section_title
;
 Structure of Mg[(UO2)(AsO4)]2*4H2O
;
_database_code_amcsd 0010264
_chemical_compound_source 'Talmessi mine, Iran'
_chemical_formula_sum 'Mg U2 As2 O16 H8'
_cell_length_a 18.207
_cell_length_b 7.062
_cell_length_c 6.661
_cell_angle_alpha 90
_cell_angle_beta 99.65
_cell_angle_gamma 90
_cell_volume 844.338
_exptl_crystal_density_diffrn      3.596
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-z'
  '-x,-y,-z'
  '1/2-x,1/2-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
Mg   0.00000   0.00000   0.50000   1.00000   0.03340
U   0.24112   0.00000   0.12820   1.00000   0.02180
As   0.20810   0.50000   0.32420   1.00000   0.03010
O1   0.33900   0.00000   0.20600   1.00000   0.04030
O2   0.14200   0.00000   0.05300   1.00000   0.04640
O3   0.22500   0.00000   0.45700   1.00000   0.02040
O4   0.12100   0.50000   0.33600   1.00000   0.20800
O5   0.24100   0.67800   0.17300   1.00000   0.03360
Wat6   0.40800   0.32000   0.46000   0.50000   0.04190
Wat7  -0.02000   0.77000   0.26000   0.50000   0.16830