#------------------------------------------------------------------------------
#$Date: 2009-11-18 14:56:34 +0000 (Wed, 18 Nov 2009) $
#$Revision: 858 $
#$URL: svn://www.crystallography.net/cod/cif/2/2103766.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided by IUCr Journals, http://journals.iucr.org/.
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_2103766
loop_
_publ_author_name
'Friedrich, Alexandra'
'Kunz, Martin'
'Suard, Emmanuelle'
_publ_section_title
;
 Temperature-dependent neutron powder diffraction study of the
 Ba(OD)~2~ polymorphs: a new low-temperature phase
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              747
_journal_page_last               758
_journal_volume                  57
_journal_year                    2001
_chemical_formula_iupac          'Ba (O D)2'
_chemical_formula_moiety         'Ba, 2(O D)'
_chemical_formula_structural     'Ba (O D)2'
_chemical_formula_sum            'Ba D2 O2'
_[local]_cod_chemical_formula_sum_orig 'D2 O2 Ba1'
_chemical_formula_weight         1386.928
_chemical_name_systematic
;
deuterated barium hydroxide
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_cell_angle_alpha                90.0
_cell_angle_beta                 95.7651(18)
_cell_angle_gamma                90.0
_cell_formula_units_Z            8
_cell_length_a                   9.4098(3)
_cell_length_b                   7.9101(3)
_cell_length_c                   6.7759(2)
_cell_measurement_temperature    RT
_cell_volume                     501.80(3)
_computing_cell_refinement       'GSAS (Larson and Von Dreele, 1994)'
_computing_data_reduction        GSAS
_computing_molecular_graphics
'Crystal Maker, version 4.0.1 (Palmer, D.C., 1994-99)'
_computing_publication_material  GSAS
_computing_structure_refinement  GSAS
_diffrn_measurement_device_type  'diffractometer D 2B, ILL'
_diffrn_radiation_source         'high-flux isotope reactor'
_diffrn_radiation_type           neutron
_diffrn_radiation_wavelength     1.59432
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.93
_refine_ls_number_parameters     1
_refine_ls_shift/esd_max         .00144
_refine_ls_shift/esd_mean        .00144
_refine_ls_structure_factor_coef rietveld
_reflns_number_gt                982
_[local]_cod_data_source_file    os0074.cif
_[local]_cod_data_source_block   brt
_[local]_cod_cif_authors_sg_H-M  'P 21/n'
loop_
_symmetry_equiv_pos_as_xyz
+x,+y,+z
-x+1/2,+y+1/2,-z+1/2
-x,-y,-z
+x+1/2,-y+1/2,+z+1/2
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_source
Ba Ba 'Koster & Yelon (1982), Neutron Diffraction Newsletter'
O O 'Koster & Yelon (1982), Neutron Diffraction Newsletter'
D D 'Koster & Yelon (1982), Neutron Diffraction Newsletter'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_thermal_displace_type
_atom_site_occupancy
Ba1 .5990(5) .6394(6) .2505(7) .01237 Uiso 1.0
Ba2 .1793(4) .5499(5) .2170(7) .00905 Uiso 1.0
O1 .8802(4) .4871(5) .1769(7) .01342 Uiso 1.0
O2 .4108(4) .3595(6) .1439(6) .01401 Uiso 1.0
O3 .6052(4) .3451(6) .4916(7) .01625 Uiso 1.0
O4 .1659(5) .2949(5) .4662(7) .02071 Uiso 1.0
D1 .8828(5) .5298(6) .3094(7) .03607 Uiso 1.0
D2 .4702(4) .3484(5) .2682(7) .02775 Uiso 1.0
D3 .6258(5) .2365(6) .4394(7) .03138 Uiso 1.0
D4 .1029(5) .2462(6) .5475(9) .03682 Uiso 1.0