#------------------------------------------------------------------------------
#$Date: 2016-02-14 16:26:36 +0200 (Sun, 14 Feb 2016) $
#$Revision: 176435 $
#$URL: svn://www.crystallography.net/cod/cif/2/00/10/2001087.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_2001087
loop_
_publ_author_name
'Janczak, J.'
'Kubiak, R.'
_publ_section_title
;
 Structure of the cyclic barium copper silicate Ba₂Cu₂[Si₄O₁₂]
 at 300 K
;
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              8
_journal_page_last               10
_journal_paper_doi               10.1107/S0108270191002354
_journal_volume                  48
_journal_year                    1992
_chemical_formula_sum            'Ba2 Cu2 O12 Si4'
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_H-M   'I 4/m m m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   7.052(2)
_cell_length_b                   7.052(2)
_cell_length_c                   11.150(3)
_cell_volume                     554.5(3)
_diffrn_radiation_type           Mo
_diffrn_radiation_wavelength     0.71073
_exptl_absorpt_coefficient_mu    11.14
_exptl_crystal_density_diffrn    4.228
_exptl_crystal_F_000             644
_cod_data_source_file            ab0183.cif
_cod_data_source_block           ab0183a
_cod_original_cell_volume        554.4(4)
_cod_original_formula_sum        'Ba2 Cu2 Si4 O12'
_cod_database_code               2001087
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Ba .00 .5000 .25000 .0157(12)
Cu .5000 .5000 .1225(3) .0089(17)
Si .2245(5) .2245(5) .00 .010(2)
O(1) .3070(11) .3070(11) .1199(8) .051(6)
O(2) .00 .259(2) .00 .070(10)
