data_SSF

#**************************************************************************
#
# CIF taken from the IZA-SC Database of Zeolite Structures
# Ch. Baerlocher and L.B. McCusker
# Database of Zeolite Structures: http://www.iza-structure.org/databases/ 
#
# The atom coordinates and the cell parameters were optimized with DLS76
# assuming a pure SiO2 composition.
#
#**************************************************************************

_cell_length_a                  17.2100(0)
_cell_length_b                  17.2100(0)
_cell_length_c                  12.7920(0)
_cell_angle_alpha               90.0000(0)
_cell_angle_beta                90.0000(0)
_cell_angle_gamma              120.0000(0)

_symmetry_space_group_name_H-M     'P 6/m m m'
_symmetry_Int_Tables_number         191
_symmetry_cell_setting             hexagonal

loop_
_symmetry_equiv_pos_as_xyz
'+x,+y,+z'
'-y,+x-y,+z'
'-x+y,-x,+z'
'-x,-y,+z'
'+y,-x+y,+z'
'+x-y,+x,+z'
'+y,+x,+z'
'+x-y,-y,+z'
'-x,-x+y,+z'
'-y,-x,+z'
'-x+y,+y,+z'
'+x,+x-y,+z'
'-x,-y,-z'
'+y,-x+y,-z'
'+x-y,+x,-z'
'+x,+y,-z'
'-y,+x-y,-z'
'-x+y,-x,-z'
'-y,-x,-z'
'-x+y,+y,-z'
'+x,+x-y,-z'
'+y,+x,-z'
'+x-y,-y,-z'
'-x,-x+y,-z'

loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
    O1    O     0.5131    0.2566    0.1394
    O2    O     0.4004    0.3121    0.1891
    O3    O     0.4667    0.3386    0.0000
    O4    O     0.5709    0.4291    0.1575
    O5    O     0.2594    0.0000    0.3074
    O6    O     0.2397    0.0000    0.1029
    O7    O     0.0880    0.9120    0.3520
    O8    O     0.2069    0.0000    0.5000
    O9    O     0.0880    0.9120    0.0000
    T1    Si    0.4880    0.3339    0.1216
    T2    Si    0.3027    0.0000    0.1958
    T3    Si    0.1823    0.0000    0.3786
    T4    Si    0.1860    0.0000    0.0000

