data_global
_chemical_name_mineral 'Hambergite'
loop_
_publ_author_name
'Burns P C'
'Novak M'
'Hawthorne F C'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 33 
_journal_year 1995
_journal_page_first 1205
_journal_page_last 1213
_publ_section_title
;
 Fluorine-hydroxyl variation in hambergite: A crystal-structure study
 Note: sample HM4
;
_database_code_amcsd 0005473
_chemical_compound_source 'Kracovice'
_chemical_formula_sum 'Be2 B H O4'
_cell_length_a 9.663
_cell_length_b 12.364
_cell_length_c 4.440
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 530.462
_exptl_crystal_density_diffrn      2.350
_symmetry_space_group_name_H-M 'P b c a'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,1/2+z'
  '-x,1/2+y,1/2-z'
  '1/2-x,1/2+y,z'
  '1/2+x,1/2-y,-z'
  '1/2+x,y,1/2-z'
  '1/2-x,-y,1/2+z'
  '-x,-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Be1   0.00390   0.18930   0.26320   0.00800
Be2   0.23860   0.06660   0.28120   0.00800
B   0.10790   0.10960   0.77800   0.00810
H   0.81200   0.19600   0.09400   0.02000
O1   0.03760   0.18870   0.62440   0.00860
O2   0.10390   0.10520   0.08680   0.00870
O3   0.18840   0.03660   0.62150   0.00940
O4   0.34510   0.16590   0.29510   0.01270