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#$Date: 2016-02-20 00:53:41 +0000 (Sat, 20 Feb 2016) $
#$Revision: 176768 $
#$URL: svn://www.crystallography.net/cod/cif/2/10/10/2101052.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_2101052
loop_
_publ_author_name
'Maslen, E. N.'
'Streltsov, V. A.'
'Streltsova, N. R.'
'Ishizawa, N.'
'Satow, Y.'
_publ_section_title
;
 Synchrotron X-ray study of the electron density in \a-Al~2~O~3~
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              973
_journal_page_last               980
_journal_paper_doi               10.1107/S0108768193006901
_journal_volume                  49
_journal_year                    1993
_chemical_formula_sum            'Al2 O3'
_chemical_formula_weight         101.96
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  '-P 3* 2n'
_symmetry_space_group_name_H-M   'R -3 c :R'
_cell_angle_alpha                90.
_cell_angle_beta                 90.
_cell_angle_gamma                120.
_cell_formula_units_Z            6
_cell_length_a                   4.7540(5)
_cell_length_b                   4.7540(5)
_cell_length_c                   12.9820(6)
_cell_volume                     254.09(6)
_diffrn_radiation_type           Mo
_diffrn_radiation_wavelength     0.71069
_exptl_absorpt_coefficient_mu    11.393
_exptl_crystal_density_diffrn    3.997
_exptl_crystal_F_000             300
_cod_data_source_file            as0628.cif
_cod_depositor_comments
;
Adding missing '_cell_length_b' tag and value after consulting the original
paper and changing '_symmetry_space_group_name_H-M' tag value from 
'R -3 c {rhombohedral axes}' to 'R -3 c :R'.

Antanas Vaitkus, 2015-02-16
;
_cod_original_sg_symbol_H-M      'R -3 c {rhombohedral axes}'
_cod_database_code               2101052
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Al .0 .0 .35222(6)
O .69424 .0 .0
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
O O 2.5215(10)
Al O 1.9700(2)
Al Al 2.6544(7)
Al Al 2.7882(2)
Al Al 3.2144(4)