data_1011144
_publ_section_title
;
Ueber den Bau des wahren Antimontetroxyds und des damit isomorphen
Stibiotantalits, Sb Ta O4
;
_journal_coden_ASTM              ZAACAB
_journal_name_full
;
Zeitschrift fuer Anorganische und Allgemeine Chemie
;
_journal_page_first              57
_journal_page_last               64
_journal_paper_doi               10.1002/zaac.19382390107
_journal_volume                  239
_journal_year                    1938
_chemical_compound_source        'from Mesa Grande, California'
_chemical_formula_structural     'Sb (Ta O4)'
_chemical_formula_sum            'O4 Sb Ta'
_chemical_name_mineral           Stibiotantalite
_chemical_name_systematic        'Antimony phyllo-tetraoxotantalate'
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      33
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   4.916
_cell_length_b                   5.542
_cell_length_c                   11.78
_cell_volume                     320.9
_exptl_crystal_density_meas      7.3
_cod_database_code               1011144
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-x,-y,1/2+z
1/2-x,1/2+y,1/2+z
1/2+x,1/2-y,z
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
Sb1 Sb3+ 4 a -0.04 0. 0. 1. 0 d
Ta1 Ta5+ 4 a 0. 0.375 0.25 1. 0 d
O1 O2- 4 a 0.16 0.33 0.09 1. 0 d
O2 O2- 4 a 0.75 0.12 0.17 1. 0 d
O3 O2- 4 a 0.25 0.12 0.33 1. 0 d
O4 O2- 4 a 0.84 0.33 0.41 1. 0 d
loop_
_atom_type_symbol
_atom_type_oxidation_number
Sb3+ 3.000
Ta5+ 5.000
O2- -2.000
