data_global
_chemical_name_mineral 'Usovite'
loop_
_publ_author_name
'Litvin A L'
'Petrunina A A'
'Ostapenko S S'
_journal_name_full 'Dopovidi Akademii Nauk Ukrainskoi RSR Seriya B-Geologichni Khimichni Ta Biologichni Nauki'
_journal_volume 3 
_journal_year 1980
_journal_page_first 47
_journal_page_last 80
_publ_section_title
;
 Crystal structure of usovite
;
_database_code_amcsd 0012515
_chemical_formula_sum 'Ba2 Ca Mg Al2 F14'
_cell_length_a 13.565
_cell_length_b 5.200
_cell_length_c 14.577
_cell_angle_alpha 90
_cell_angle_beta 91.50
_cell_angle_gamma 90
_cell_volume 1027.880
_exptl_crystal_density_diffrn      4.258
_symmetry_space_group_name_H-M 'C 1 2/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+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_U_iso_or_equiv
Ba   0.30860   0.45760   0.38200   0.00185
Ca   0.00000   0.43760   0.25000   0.00185
Mg   0.00000   0.50000   0.00000   0.00185
Al   0.38440   0.49460   0.12190   0.00185
F1   0.26020   0.45770   0.07840   0.00185
F2   0.07870   0.18790   0.97480   0.00185
F3   0.38710   0.21130   0.55040   0.00185
F4   0.00580   0.06260   0.15950   0.00185
F5   0.34070   0.30120   0.71420   0.00185
F6   0.12580   0.28030   0.80540   0.00185
F7   0.43440   0.05360   0.38140   0.00185