data_global
_chemical_name_mineral 'Byrudite'
loop_
_publ_author_name
'Raade G'
'Balic-Zunic T'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 44 
_journal_year 2006
_journal_page_first 1147
_journal_page_last 1158
_publ_section_title
;
 The crystal structure of (Be,_)(V,Ti)3O6, a mineral related to kyzylkumite
;
_database_code_amcsd 0006110
_chemical_compound_source 'Byrud farm, Eidsvoll, Akershus, South Norway'
_chemical_formula_sum 'Be.84 (V1.5 Ti1.5) O6'
_cell_length_a 9.982
_cell_length_b 8.502
_cell_length_c 4.5480
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 385.975
_exptl_crystal_density_diffrn      4.333
_symmetry_space_group_name_H-M 'P n m a'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  'x,1/2-y,z'
  '-x,1/2+y,-z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2-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_occupancy
_atom_site_U_iso_or_equiv
Be   0.28030   0.75000   0.07510   0.84000   0.01300
V1   0.40497   0.25000   0.00773   0.50000   0.00730
Ti1   0.40497   0.25000   0.00773   0.50000   0.00730
V2   0.12914   0.43081   0.00440   0.50000   0.00700
Ti2   0.12914   0.43081   0.00440   0.50000   0.00700
O1   0.22040   0.25000   0.22550   1.00000   0.00660
O2   0.43360   0.75000   0.23960   1.00000   0.00890
O3   0.46500   0.41470   0.26690   1.00000   0.00870
O4   0.20640   0.59510   0.25110   1.00000   0.00930