data_global
_chemical_name_mineral 'Vimsite'
loop_
_publ_author_name
'Shashkin D P'
'Simonov M A'
'Belov N V'
_journal_name_full 'Doklady Akademii Nauk SSSR'
_journal_volume 182 
_journal_year 1968
_journal_page_first 821
_journal_page_last 824
_publ_section_title
;
 Crystal structure of a new natural borate vimsite Ca[B2O2(OH)4]
;
_database_code_amcsd 0012447
_chemical_formula_sum 'Ca B2 O6 H4'
_cell_length_a 10.02
_cell_length_b 9.71
_cell_length_c 4.440
_cell_angle_alpha 90
_cell_angle_beta 92
_cell_angle_gamma 90
_cell_volume 431.723
_exptl_crystal_density_diffrn      2.488
_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
Ca   0.00000   0.20800   0.25000   0.01165
B   0.20900   0.07000   0.81300   0.01165
O1   0.16500   0.04800   0.11400   0.01165
O-H2   0.35900   0.08400   0.79900   0.01165
O-H3   0.14200   0.20100   0.70500   0.01165