data_global
_chemical_name_mineral 'Hambergite'
loop_
_publ_author_name
'Zachariasen W'
_journal_name_full 'Zeitschrift fur Kristallographie'
_journal_volume 76 
_journal_year 1931
_journal_page_first 289
_journal_page_last 302
_publ_section_title
;
 The crystalline structure of hambergite Be2BO3(OH)
 _cod_database_code 1011268
;
_database_code_amcsd 0018127
_chemical_formula_sum 'Be2 B O4'
_cell_length_a 9.75
_cell_length_b 12.204
_cell_length_c 4.429
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 527.002
_exptl_crystal_density_diffrn      2.340
_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
Be1  -0.03100   0.18300   0.45800
Be2   0.23600   0.06900   0.45800
B1   0.11700   0.10300  -0.02800
O1   0.03100   0.18300  -0.16700
O2   0.09700   0.10300   0.27800
O3   0.19400   0.03800  -0.16700
O4  -0.16700   0.18300   0.16700