#------------------------------------------------------------------------------
#$Date: 2024-05-16 08:36:09 +0200 (Thu 16 de May de 2024) $
#$Revision: 291877 $
#$URL: svn://www.crystallography.net/cod/cif/9/01/31/9013140.cif $
#------------------------------------------------------------------------------
#
# 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_9013140
loop_
_publ_author_name
'Yang, P.'
'Fun, H.-K.'
'Rahman, I. A.'
'Saleh, M. I.'
_publ_section_title
;Two phase refinements of the structures of a-Si3N4 and B-Si3N4 made from rice
 husk by Rietveld analysis Sample: Beta phase
;
_journal_name_full               'Ceramics International'
_journal_page_first              137
_journal_page_last               142
_journal_paper_doi               10.1016/0272-8842(95)95885-L
_journal_volume                  21
_journal_year                    1995
_chemical_formula_structural     Si3N4
_chemical_formula_sum            'N4 Si3'
_space_group_IT_number           176
_symmetry_space_group_name_Hall  '-P 6c'
_symmetry_space_group_name_H-M   'P 63/m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_length_a                   7.6093
_cell_length_b                   7.6093
_cell_length_c                   2.9079
_cell_formula_units_Z            2
_cell_volume                     145.814
_database_code_amcsd             0012186
_exptl_crystal_density_diffrn    3.195
_cod_original_formula_sum        'Si3 N4'
_cod_database_code               9013140
_amcsd_formula_title             Si3N4
loop_
_space_group_symop_operation_xyz
x,y,z
-x+y,-x,1/2-z
x-y,x,1/2+z
y,-x+y,-z
-y,x-y,z
x,y,1/2-z
-x,-y,1/2+z
x-y,x,-z
-x+y,-x,z
-y,x-y,1/2-z
y,-x+y,1/2+z
-x,-y,-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
Si 0.17420 -0.23220 0.25000 0.00646
N1 0.33333 0.66667 0.25000 0.01140
N2 0.32900 0.03900 0.25000 0.02533
loop_
_cod_related_entry_id
_cod_related_entry_database
_cod_related_entry_code
1 AMCSD 0012186
