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 HM1
;
_database_code_amcsd 0005470
_chemical_compound_source 'Himalaya mine, California, USA'
_chemical_formula_sum 'Be2 B H O4'
_cell_length_a 9.776
_cell_length_b 12.194
_cell_length_c 4.430
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 528.094
_exptl_crystal_density_diffrn      2.361
_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   0.00300   0.18850   0.26320   0.00700
Be2   0.23760   0.06790   0.27670   0.00750
B   0.10630   0.10720   0.77290   0.00620
H   0.81400   0.21600   0.07500   0.02000
O1   0.03720   0.18770   0.61920   0.00790
O2   0.10090   0.10260   0.08250   0.00760
O3   0.18710   0.03420   0.61750   0.00790
O4   0.34000   0.17310   0.29520   0.00960