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 = 21 kbar
;
_database_code_amcsd 0001037
_chemical_formula_sum 'Si Al Be O5'
_cell_length_a 4.759
_cell_length_b 14.255
_cell_length_c 4.612
_cell_angle_alpha 90
_cell_angle_beta 100.24
_cell_angle_gamma 90
_cell_volume 307.892
_exptl_crystal_density_diffrn      3.108
_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   0.17840   0.10020   0.53590   0.00735
Al   0.24770   0.44410   0.95760   0.00887
Be   0.17070   0.29850   0.45730   0.01267
O1   0.38310   0.03240   0.75920   0.00874
O2   0.37900   0.37720   0.64890   0.00849
O3   0.34450   0.19660   0.52910   0.00823
O4   0.10100   0.05420   0.20960   0.00849
O5   0.15860   0.32970   0.11560   0.01026