#------------------------------------------------------------------------------
#$Date: 2016-02-13 21:28:24 +0200 (Sat, 13 Feb 2016) $
#$Revision: 176429 $
#$URL: svn://www.crystallography.net/cod/cif/2/31/10/2311029.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_2311029
loop_
_publ_author_name
'Zachariasen, W.H.'
_publ_section_title
;
 Crystal chemical studies of the 5f-series of elements. XXI. The crystal
 structure of magnesium orthouranate
;
_journal_name_full               'Acta Crystallographica (1,1948-23,1967)'
_journal_page_first              788
_journal_page_last               791
_journal_volume                  7
_journal_year                    1954
_chemical_formula_sum            'Mg O4 U'
_chemical_name_systematic        'Mg (U O4)'
_space_group_IT_number           74
_symmetry_space_group_name_Hall  '-I 2b 2 (-x,z,y)'
_symmetry_space_group_name_H-M   'I m m a (-a,c,b)'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.52
_cell_length_b                   6.595
_cell_length_c                   6.924
_cell_volume                     297.728
_citation_journal_id_ASTM        ACCRA9
_cod_data_source_file            Zachariasen_ACCRA9_1954_219.cif
_cod_data_source_block           Mg1O4U1
_cod_original_cell_volume        297.7278
_cod_original_sg_symbol_H-M      'I m a m'
_cod_original_formula_sum        'Mg1 O4 U1'
_cod_database_code               2311029
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-x,y,-z+1/2
x,-y,-z
-x,-y,z+1/2
-x,-y,-z
x,-y,z-1/2
-x,y,z
x,y,-z-1/2
x+1/2,y+1/2,z+1/2
-x+1/2,y+1/2,-z+1
x+1/2,-y+1/2,-z+1/2
-x+1/2,-y+1/2,z+1
-x+1/2,-y+1/2,-z+1/2
x+1/2,-y+1/2,z
-x+1/2,y+1/2,z+1/2
x+1/2,y+1/2,-z
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
U1 U+6 0 0.0222 0.25 1 0.0
O1 O-2 0.295 0.022 0.25 1 0.0
O2 O-2 0 0.2 -0.012 1 0.0
Mg1 Mg+2 0 0.5 0 1 0.0
