/usr/share/avogadro/crystals/zeolites/LIO.cif is in avogadro-data 1.2.0-3.
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#**************************************************************************
#
# 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/
#
# All data on this site have been placed in the public domain.
# If you use this work in a scientific publication, you are obligated to
# cite its origin.
#
# The atom coordinates and the cell parameters were optimized with DLS76
# assuming a pure SiO2 composition.
#
#**************************************************************************
_cell_length_a 12.2810(0)
_cell_length_b 12.2810(0)
_cell_length_c 15.6320(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 2'
_symmetry_Int_Tables_number 187
_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'
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
O1 O 0.3166 0.9770 0.0840
O2 O 0.2314 0.7686 0.1732
O3 O 0.3004 0.9830 0.2512
O4 O 0.4708 0.9416 0.1813
O5 O 0.2588 0.1294 0.3521
O6 O 0.1158 0.8842 0.3632
O7 O 0.3503 0.9941 0.4159
O8 O 0.3929 0.1964 0.5000
O9 O 0.5627 0.1255 0.5000
O10 O 0.2736 0.1368 0.0000
O11 O 0.1043 0.8957 0.0000
T1 Si 0.3299 0.9174 0.1724
T2 Si 0.2563 0.9975 0.3453
T3 Si 0.4145 0.0777 0.5000
T4 Si 0.2525 0.9966 0.0000
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