data_global
_chemical_name_mineral 'Wurtzite-4H'
loop_
_publ_author_name
'Chao G Y'
'Gault R A'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 36 
_journal_year 1998
_journal_page_first 775
_journal_page_last 778
_publ_section_title
;
 The occurence of two rare polytypes of wurtzite, 4H and 8H,
 at Mont Saint-Hilaire, Quebec
;
_database_code_amcsd 0005544
_chemical_compound_source 'Mont Saint-Hilaire, Quebec, Canada'
_chemical_formula_sum 'Zn S'
_cell_length_a 3.8227
_cell_length_b 3.8227
_cell_length_c 12.52
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 120
_cell_volume 158.444
_exptl_crystal_density_diffrn      4.085
_symmetry_space_group_name_H-M 'P 63 m c'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '-x,-x+y,1/2+z'
  'x-y,x,1/2+z'
  '-y,-x,z'
  '-y,x-y,z'
  'x-y,-y,1/2+z'
  '-x,-y,1/2+z'
  'x,x-y,z'
  '-x+y,-x,z'
  'y,x,1/2+z'
  'y,-x+y,1/2+z'
  '-x+y,y,z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Zn1   0.00000   0.00000   0.00000
Zn2   0.33333   0.66667   0.25000
S1   0.00000   0.00000   0.18750
S2   0.33333   0.66667   0.43750