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#$Date$
#$Revision$
#$URL$
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#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided the American Mineralogist Crystal Structure Database,
# http://rruff.geo.arizona.edu/AMS/amcsd.php
#
# 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_9010155
loop_
_publ_author_name
'Lopano, C. L.'
'Heaney, P. J.'
'Post, J. E.'
'Hanson, J.'
'Komarneni, S.'
_publ_section_title
;
 Time-resolved structural analysis of K-and Ba-exchange reactions with synthetic
 Na-birnessite using synchrotron X-ray diffraction
 Locality: synthetic
 Sample: Na-birnessite
;
_journal_name_full               'American Mineralogist'
_journal_page_first              380
_journal_page_last               387
_journal_volume                  92
_journal_year                    2007
_chemical_formula_sum            'H4 Mn Na0.29 O2.691'
_chemical_name_mineral           Birnessite
_space_group_IT_number           2
_symmetry_space_group_name_Hall  '-P 1 (1/2*x+1/2*y,1/2*x-1/2*y,-z)'
_symmetry_space_group_name_H-M   'C -1'
_cell_angle_alpha                89.45
_cell_angle_beta                 103.18
_cell_angle_gamma                89.91
_cell_length_a                   5.1780
_cell_length_b                   2.8509
_cell_length_c                   7.3344
_cell_volume                     105.412
_[local]_cod_data_source_file    04274.cif
_[local]_cod_data_source_block   global
_[local]_cod_chemical_formula_sum_orig 'Na.29 Mn O2.691 H4'
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
1/2+x,1/2+y,z
-x,-y,-z
1/2-x,1/2-y,-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Na -0.02700 0.31540 0.48850 0.14500 0.07260
Mn 0.00000 0.00000 0.00000 1.00000 0.00450
O 0.36860 -0.02410 0.13070 1.00000 0.01380
Wat -0.02700 0.31540 0.48850 0.34530 0.07260