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#$Date: 2015-07-14 02:13:14 +0300 (Tue, 14 Jul 2015) $
#$Revision: 151562 $
#$URL: svn://www.crystallography.net/cod/cif/2/31/06/2310658.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_2310658
loop_
_publ_author_name
'Ruddlesden, S.N.'
'Popper, P.'
_publ_section_title
;
 On the crystal structures of the nitrides of silicon and germanium
;
_journal_name_full               'Acta Crystallographica (1,1948-23,1967)'
_journal_page_first              465
_journal_page_last               468
_journal_volume                  11
_journal_year                    1958
_chemical_formula_sum            'N4 Si3'
_chemical_name_systematic        'Si3 N4'
_space_group_IT_number           159
_symmetry_space_group_name_Hall  'P 3 -2c'
_symmetry_space_group_name_H-M   'P 3 1 c'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_formula_units_Z            4
_cell_length_a                   7.753
_cell_length_b                   7.753
_cell_length_c                   5.618
_cell_volume                     292.450
_citation_journal_id_ASTM        ACCRA9
_cod_data_source_file            Ruddlesden_ACCRA9_1958_265.cif
_cod_data_source_block           N4Si3
_cod_original_cell_volume        292.4502
_cod_database_code               2310658
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-y,x-y,z
-x+y,-x,z
y,x,z+1/2
-x,-x+y,z+1/2
x-y,-y,z+1/2
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
N3 N-3 0.3333 0 0 1 0.0
Si2 Si+4 0.1667 0.25 0 1 0.0
N1 N-3 0 0 0 1 0.0
N4 N-3 0.3333 0.3333 0.25 1 0.0
Si1 Si+4 0.5 0.0833 0.25 1 0.0
N2 N-3 0 0 0.75 1 0.0
