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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/1/00/50/1005006.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_1005006
loop_
_publ_author_name
'Brese, N E'
'O'Keefe, M'
'Rauch, P'
'DiSalvo, F J'
_publ_section_title
;
Structure of Ta~3~N~5~ at 16 K by time-of-flight neutron diffraction
;
_journal_coden_ASTM              ACSCEE
_journal_name_full               'Acta Crystallographica C (39,1983-)'
_journal_page_first              2291
_journal_page_last               2294
_journal_volume                  47
_journal_year                    1991
_chemical_formula_structural     'Ta3 N5'
_chemical_formula_sum            'N5 Ta3'
_chemical_name_systematic        'Tritantalum nitride'
_space_group_IT_number           63
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      63
_symmetry_space_group_name_Hall  '-C 2c 2'
_symmetry_space_group_name_H-M   'C m c m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   3.8862(1)
_cell_length_b                   10.2118(2)
_cell_length_c                   10.2624(3)
_cell_volume                     407.3
_refine_ls_R_factor_all          0.043
_cod_database_code               1005006
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
x,-y,-z
x,y,1/2-z
x,-y,1/2+z
-x,-y,-z
-x,y,z
-x,-y,1/2+z
-x,y,1/2-z
1/2+x,1/2+y,z
1/2+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,1/2-y,-z
1/2-x,1/2+y,z
1/2-x,1/2-y,1/2+z
1/2-x,1/2+y,1/2-z
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_22
_atom_site_aniso_U_23
_atom_site_aniso_U_33
Ta1 0.0048(3) 0. 0. 0.0083(3) 0. 0.0037(3)
Ta2 0.0037(2) 0. 0.01(2) 0.0075(2) 0. 0.0069(3)
N1 0.0080(3) 0. 0. 0.0086(3) 0. 0.0088(3)
N2 0.0136(2) 0. -0.0008(2) 0.0081(2) 0. 0.0083(2)
N3 0.0070(2) 0. 0.0012(2) 0.0083(2) 0. 0.0095(2)
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
Ta1 Ta5+ 4 c 0. 0.1971(1) 0.25 1. 0 d
Ta2 Ta5+ 8 f 0. 0.13455(7) 0.55906(7) 1. 0 d
N1 N3- 4 c 0. 0.76322(7) 0.25 1. 0 d
N2 N3- 8 f 0. 0.04701(6) 0.11949(5) 1. 0 d
N3 N3- 8 f 0. 0.30862(6) 0.07378(5) 1. 0 d
loop_
_atom_type_symbol
_atom_type_oxidation_number
Ta5+ 5.000
N3- -3.000