data_global
_chemical_name_mineral 'Oursinite'
loop_
_publ_author_name
'Kabatko K A'
'Burns P C'
_journal_name_full 'American Mineralogist'
_journal_volume 91 
_journal_year 2006
_journal_page_first 333
_journal_page_last 336
_publ_section_title
;
 A novel arrangement of silicate tetrahedra in the uranyl silicate sheet of
 oursinite, (Co0.8Mg0.2)[(UO2)(SiO3OH)]2(H2O)6
;
_database_code_amcsd 0004122
_chemical_formula_sum '(Co.8 Mg.2) U2 Si2 O18 H14'
_cell_length_a 7.0494
_cell_length_b 17.550
_cell_length_c 12.734
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1575.412
_exptl_crystal_density_diffrn      3.737
_symmetry_space_group_name_H-M 'C m c a'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,1/2-y,1/2+z'
  '1/2+x,-y,1/2+z'
  '-x,1/2+y,1/2-z'
  '1/2-x,+y,1/2-z'
  '-x,y,z'
  '1/2-x,1/2+y,z'
  'x,-y,-z'
  '1/2+x,1/2-y,-z'
  'x,1/2+y,1/2-z'
  '1/2+x,+y,1/2-z'
  '-x,1/2-y,1/2+z'
  '1/2-x,-y,1/2+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
Co   0.00000   0.50000   0.00000   0.80000   0.02180
Mg   0.00000   0.50000   0.00000   0.20000   0.02180
U   0.00000   0.20567   0.18049   1.00000   0.01210
Si   0.00000   0.29910  -0.07160   1.00000   0.01400
O1   0.00000   0.10350   0.16850   1.00000   0.02300
O2   0.00000   0.30820   0.19440   1.00000   0.02200
O3   0.00000   0.22610   0.00600   1.00000   0.01770
O4   0.17560   0.30030  -0.15380   1.00000   0.01880
O-h5   0.00000   0.37790   0.00160   1.00000   0.02200
Ow6   0.20060   0.49790   0.11770   1.00000   0.05000
Ow7   0.50000   0.39980   0.12120   1.00000   0.03600
H1   0.00000   0.38200   0.07600   1.00000   0.05000
H2   0.27500   0.48300   0.06200   1.00000   0.05000
H3   0.23100   0.54900   0.13600   1.00000   0.05000
H4   0.50000   0.36900   0.18300   1.00000   0.05000
H5   0.50000   0.37700   0.05300   1.00000   0.05000
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Co 0.02420 0.01860 0.02250 0.00000 0.00000 -0.00140
Mg 0.02420 0.01860 0.02250 0.00000 0.00000 -0.00140
U 0.00754 0.01770 0.01106 0.00000 0.00000 0.00070
Si 0.01310 0.01980 0.00910 0.00000 0.00000 0.00170
O1 0.02000 0.01500 0.03400 0.00000 0.00000 -0.00100
O2 0.03000 0.02300 0.01400 0.00000 0.00000 -0.00200
O3 0.01900 0.02200 0.01200 0.00000 0.00000 -0.00100
O4 0.00900 0.03500 0.01300 -0.00100 0.00100 0.00300
O-h5 0.03400 0.01700 0.01700 0.00000 0.00000 -0.00300
Ow6 0.05200 0.03600 0.06200 0.00100 -0.02900 -0.01300
Ow7 0.05000 0.02600 0.03100 0.00000 0.00000 0.00200