data_2002230
_chemical_name_systematic          'Calcium tetragallium oxide'
_chemical_formula_structural       'Ca Ga4 O7'
_chemical_formula_sum              'Ca Ga4 O7'
_publ_section_title                'Zur Kenntnis von Ca Ga4 O7'
loop_
_publ_author_name
  'Deiseroth, H J'
  'Mueller-Buschbaum, Hk'
_journal_name_full
;
Zeitschrift fuer Anorganische und Allgemeine Chemie
;
_journal_volume                    382
_journal_year                      1971
_journal_page_first                149
_journal_page_last                 156
_cell_length_a                     13.065
_cell_length_b                     9.079
_cell_length_c                     5.6
_cell_angle_alpha                  90
_cell_angle_beta                   105.15
_cell_angle_gamma                  90
_cell_volume                       641.2
_cell_formula_units_Z              4
_exptl_crystal_density_meas        4.44
_symmetry_space_group_name_H-M     'C 1 2/c 1'
_symmetry_Int_Tables_number        15
_symmetry_cell_setting             monoclinic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,y,1/2-z'
  '-x,-y,-z'
  'x,-y,1/2+z'
  '1/2+x,1/2+y,z'
  '1/2-x,1/2+y,1/2-z'
  '1/2-x,1/2-y,-z'
  '1/2+x,1/2-y,1/2+z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Ca2+   2.000
  Ga3+   3.000
  O2-   -2.000
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_calc_flag
  Ca1   Ca2+   4 e 0. 0.297 0.25 1.  0 d
  Ga1   Ga3+   8 f 0.121 0.062 0.743 1.  0 d
  Ga2   Ga3+   8 f 0.34 0.085 0.188 1.  0 d
  O1    O2-    8 f 0.195 0.058 0.075 1.  0 d
  O2    O2-    8 f 0.383 0.068 -0.09 1.  0 d
  O3    O2-    8 f 0.116 0.25 -0.355 1.  0 d
  O4    O2-    4 e 0. 0.062 0.25 1.  0 d