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#$Date: 2015-01-27 19:58:39 +0000 (Tue, 27 Jan 2015) $
#$Revision: 130149 $
#$URL: svn://www.crystallography.net/cod/cif/1/00/10/1001087.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_1001087
loop_
_publ_author_name
'Rebbah, A'
'Desgardin, G'
'Raveau, B'
_publ_section_title
;
Nonstoichiometric oxides with a layer structure: The compounds A~1-x~
(Ti~1-x~ M~1+x~) O~5~
;
_journal_coden_ASTM              JSSCBI
_journal_name_full               'Journal of Solid State Chemistry'
_journal_page_first              321
_journal_page_last               328
_journal_paper_doi               10.1016/0022-4596(80)90094-8
_journal_volume                  31
_journal_year                    1980
_chemical_formula_structural     'K Ti Ta O5'
_chemical_formula_sum            'K O5 Ta Ti'
_chemical_name_systematic        'Potassium titanium tantalum oxide'
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      62
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.437
_cell_length_b                   3.797
_cell_length_c                   18.474
_cell_volume                     451.5
_exptl_crystal_density_meas      5.1
_refine_ls_R_factor_all          0.068
_cod_database_code               1001087
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
1/2+x,1/2-y,1/2-z
-x,1/2+y,-z
1/2-x,-y,1/2+z
-x,-y,-z
1/2-x,1/2+y,1/2+z
x,1/2-y,z
1/2+x,y,1/2-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
K1 K1+ 4 c 0.794(2) 0.25 0.8112(8) 1. 0 d
Ti1 Ti4+ 4 c 0.329(2) 0.25 0.0308(6) 0.75 0 d
Ta1 Ta5+ 4 c 0.329(2) 0.25 0.0308(6) 0.25 0 d
Ti2 Ti4+ 4 c 0.763(2) 0.25 0.1097(2) 0.25 0 d
Ta2 Ta5+ 4 c 0.763(2) 0.25 0.1097(2) 0.75 0 d
O1 O2- 4 c 0.069(6) 0.25 0.059(3) 1. 0 d
O2 O2- 4 c 0.669(5) 0.25 -0.008(3) 1. 0 d
O3 O2- 4 c 0.466(6) 0.25 0.110(2) 1. 0 d
O4 O2- 4 c 0.903(5) 0.25 0.189(3) 1. 0 d
O5 O2- 4 c 0.279(7) 0.25 0.923(2) 1. 0 d
loop_
_atom_type_symbol
_atom_type_oxidation_number
K1+ 1.000
Ti4+ 4.000
Ta5+ 5.000
O2- -2.000