data_global
_chemical_name_mineral 'Euclase'
loop_
_publ_author_name
'Hazen R M'
'Au A Y'
'Finger L W'
_journal_name_full 'American Mineralogist'
_journal_volume 71 
_journal_year 1986
_journal_page_first 977
_journal_page_last 984
_publ_section_title
;
 High-pressure crystal chemistry of beryl (Be3Al2Si6O18) and euclase (BeAlSiO4OH)
 Sample: Pressure = .001 kbar
;
_database_code_amcsd 0001036
_chemical_formula_sum 'Si Al Be O5 H'
_cell_length_a 4.780
_cell_length_b 14.322
_cell_length_c 4.6335
_cell_angle_alpha 90
_cell_angle_beta 100.310
_cell_angle_gamma 90
_cell_volume 312.084
_exptl_crystal_density_diffrn      3.088
_symmetry_space_group_name_H-M 'P 1 21/a 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2-y,z'
  '1/2-x,1/2+y,-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
Si   0.17752   0.10027   0.53639   0.00494
Al   0.24877   0.44470   0.95708   0.00570
Be   0.17410   0.30060   0.45710   0.00760
O1   0.38180   0.03240   0.76300   0.00659
O2   0.38000   0.37700   0.65210   0.00633
O3   0.34310   0.19980   0.52480   0.00671
O4   0.10060   0.05310   0.21130   0.00633
O5   0.15960   0.33200   0.12060   0.00899
H   0.06300   0.30200   0.01100   0.03040