data_2008101
_journal_name_full  'Acta Crystallographica'
_journal_year  1999
_journal_volume  C55
_journal_page_first  14
_journal_page_last  17
_publ_section_title
;
A powder diffraction study of BaCaGa~4~O~8~
;
loop_
_publ_author_name
  'Shun-ich Kubota'
  'Hisanori Yamane'
  'Masahiko Shimada'
_chemical_formula_moiety  'Ba1 Ca1 Ga4 O8'
_chemical_formula_sum  'Ba1 Ca1 Ga4 O8'
_chemical_formula_weight  584.29
_symmetry_cell_setting  orthorhombic
_symmetry_space_group_name_H-M  'I m m 2'
_symmetry_space_group_name_Hall  'I 2 -2'
loop_
_symmetry_equiv_pos_as_xyz
  +x,+y,+z
  -x,-y,+z
  +x,-y,+z
  -x,+y,+z
  1/2+x,1/2+y,1/2+z
  1/2-x,1/2-y,1/2+z
  1/2+x,1/2-y,1/2+z
  1/2-x,1/2+y,1/2+z
_cell_length_a  8.25350(10)
_cell_length_b  9.20840(10)
_cell_length_c  5.16100(10)
_cell_angle_alpha  90.0
_cell_angle_beta  90.0
_cell_angle_gamma  90.0
_cell_volume  392.250(10)
_cell_formula_units_Z  2
_cell_measurement_temperature  293
_exptl_crystal_density_diffrn  4.94710(10)
_diffrn_ambient_temperature  293
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_occupancy
  Ga 0.2916(2) 0.1672(2) 0.4612(4) 0.46(4) 1.0
  Ca 0.0 0.5 0.4339(9) 0.11(4) 1.0
  Ba 0.0 0.0 0.0 0.75(4) 1.0
  O1 0.2939(8) 0.1694(8) 0.1052(14) 1.26(18) 1.0
  O2 0.0 0.3296(12) 0.079(2)  1.0(3)  1.0
  O3 0.1872(13) 0.0 0.581(2)  1.6(3)  1.0
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_site_symmetry_1
_geom_bond_site_symmetry_2
_geom_bond_distance
_geom_bond_publ_flag
  Ga O1 1 6 1.821(8) yes
  Ga O2 1 7 1.824(4) yes
  Ga O1 1 1 1.837(7) yes
  Ga O3 1 1 1.869(6) yes
  Ca O2 1 1 2.413(12) yes
  Ca O1 1 6 2.471(8) yes
  Ca O3 1 8_554 3.161(11) yes
  Ba O3 1 1_554 2.660(11) yes
  Ba O1 1 1 2.935(7) yes
  Ba O2 1 1 3.062(11) yas
  Ba O3 1 1 3.371(11) yes