#------------------------------------------------------------------------------
#$Date: 2008-04-03 13:11:48 +0300 (Thu, 03 Apr 2008) $
#$Revision: 326 $
#$URL: file:///home/coder/svn-repositories/cod/cif/2/2101662.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_2101662
loop_
_publ_author_name
I.P.Swainson
R.J.C.Brown
_publ_section_title
; Refinement of Ammonium Perrhenate Structure using a
 Pseudo-spin Model for the Ammonium Ion
Orientation
;
_journal_issue                   FEB97
_journal_name_full               'Acta Crystallographica, Section B'
_journal_page_first              76
_journal_page_last               81
_journal_volume                  B53
_journal_year                    1997
_chemical_formula_moiety         'N D4 1+, Re O4 1-'
_chemical_formula_sum            'D4 N1 O4 Re1'
_chemical_formula_weight         272.3
_chemical_name_common            'ammonium perrhenate'
_chemical_name_systematic        ' ammonium rhenium(VII) oxide'
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  '-I 4ad'
_symmetry_space_group_name_H-M   'I 41/a (origin at -1)'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.9956(2)
_cell_length_b                   5.9956(2)
_cell_length_c                   12.4783(5)
_cell_measurement_temperature    140
_cell_volume                     448.57(4)
_computing_cell_refinement
'GSAS (A.C.Larson and R.B.Von Dreele, Los Alamos Rpt LA-UR-86-748)'
_computing_structure_refinement
'GSAS (A.C.Larson  and R.B.Von Dreele, Los Alamos Rpt LA-UR-86-748)'
_diffrn_ambient_temperature      'room temperature'
_diffrn_measurement_device       '30 element multidetector'
_diffrn_measurement_method       'profile data from 2theta scans'
_diffrn_radiation_monochromator  Si(115)
_diffrn_radiation_source         'NRU reactor'
_diffrn_radiation_type           neutron
_diffrn_radiation_wavelength     1.49978(9)
_exptl_absorpt_coefficient_mu    0.083
_exptl_absorpt_correction_T_max  0.614
_exptl_absorpt_correction_T_min  0.594
_exptl_absorpt_correction_type   cylindrical
_refine_ls_hydrogen_treatment    refall
_refine_ls_number_constraints    60
_refine_ls_number_parameters     45
_refine_ls_shift/esd_max         0.05
_refine_ls_shift/esd_mean        0.00
_[local]_cod_data_source_file    br0049.cif
loop_
_symmetry_equiv_pos_as_xyz
+x,
+y,
+z
-x+1/2,
-y,
+z+1/2
-y+3/4,
+x+1/4,
+z+1/4
+y+3/4,
-x+3/4,
+z+3/4
-x,
-y,
-z
+x+1/2,
+y,
-z+1/2
+y+1/4,
-x+3/4,
-z+3/4
-y+1/4,
+x+1/4,
-z+1/4
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_source
N N 'Larson and Von Dreele, GSAS Rpt LS-UR-86-748'
D deuterium 'Larson and Von Dreele, GSAS Rpt LS-UR-86-748'
Re Re 'Larson and Von Dreele, GSAS Rpt LS-UR-86-748'
O O 'Larson and Von Dreele, GSAS Rpt LS-UR-86-748'
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
N 0.5 0.75 0.125 0.0260 1.0
D 0.4576(4) 0.61702(12) 0.17243(7) 0.0488 1.0
Re 0.0 0.25 0.125 0.0148 1.0
O 0.2039(3) 0.3722(3) 0.04590(16) 0.0241 1.0
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
N 0.02732 0.02732 0.02347 0.0 0.0 0.0
D 0.06477 0.03952 0.04215 -0.00897 -0.00401 -0.01258
Re 0.0126(8) 0.0126(8) 0.0191(13) 0.0 0.0 0.0
O 0.0255(11) 0.0273(12) 0.0196(11) -0.0010(12) 0.0046(8) -0.0008(10)
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
N D 1.0250(10)
Re O 1.733(2)
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
O Re O 110.60(10)