#------------------------------------------------------------------------------
#$Date: 2009-05-13 21:45:18 +0300 (Wed, 13 May 2009) $
#$Revision: 720 $
#$URL: file:///home/coder/svn-repositories/cod/cif/1/1010283.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_1010283
_chemical_name_systematic          'Tungsten silicide (1/2)'
_chemical_formula_structural       'W Si2'
_chemical_formula_sum              'Si2 W'
_publ_section_title
;
Ueber die Kristallstruktur von Mo Si~2~ und W Si~2~
;
loop_
_publ_author_name                  'Zachariasen, W H'
_journal_name_full
;
Zeitschrift fuer Physikalische Chemie (Leipzig)
;
_journal_coden_ASTM                ZPCLAH
_journal_volume                    128
_journal_year                      1927
_journal_page_first                39
_journal_page_last                 48
_cell_length_a                     3.212(5)
_cell_length_b                     3.212(5)
_cell_length_c                     7.880(5)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       81.3
_cell_formula_units_Z              2
_exptl_crystal_density_meas        9.35(10)
_symmetry_space_group_name_H-M     'I 4/m m m'
_symmetry_Int_Tables_number        139
_symmetry_cell_setting             tetragonal
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,-y,z'
  '-x,y,z'
  'x,-y,z'
  '-y,x,z'
  'y,-x,z'
  'y,x,z'
  '-y,-x,z'
  '-x,-y,-z'
  'x,y,-z'
  'x,-y,-z'
  '-x,y,-z'
  'y,-x,-z'
  '-y,x,-z'
  '-y,-x,-z'
  'y,x,-z'
  '1/2+x,1/2+y,1/2+z'
  '1/2-x,1/2-y,1/2+z'
  '1/2-x,1/2+y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '1/2-y,1/2+x,1/2+z'
  '1/2+y,1/2-x,1/2+z'
  '1/2+y,1/2+x,1/2+z'
  '1/2-y,1/2-x,1/2+z'
  '1/2-x,1/2-y,1/2-z'
  '1/2+x,1/2+y,1/2-z'
  '1/2+x,1/2-y,1/2-z'
  '1/2-x,1/2+y,1/2-z'
  '1/2+y,1/2-x,1/2-z'
  '1/2-y,1/2+x,1/2-z'
  '1/2-y,1/2-x,1/2-z'
  '1/2+y,1/2+x,1/2-z'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  W0     0.000
  Si0    0.000
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_calc_flag
  W1    W0     2 a 0. 0. 0. 1.  0 d
  Si1   Si0    4 e 0. 0. 0.333(15) 1.  0 d