/usr/share/avogadro/crystals/zeolites/SFN.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 25.2210(0)
_cell_length_b 5.2560(0)
_cell_length_c 15.0220(0)
_cell_angle_alpha 90.0000(0)
_cell_angle_beta 103.8900(0)
_cell_angle_gamma 90.0000(0)
_symmetry_space_group_name_H-M 'C 2/m'
_symmetry_Int_Tables_number 12
_symmetry_cell_setting monoclinic
loop_
_symmetry_equiv_pos_as_xyz
'+x,+y,+z'
'1/2+x,1/2+y,+z'
'-x,+y,-z'
'1/2-x,1/2+y,-z'
'-x,-y,-z'
'1/2-x,1/2-y,-z'
'+x,-y,+z'
'1/2+x,1/2-y,+z'
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
O1 O 0.4868 0.5000 0.5978
O2 O 0.5677 0.2499 0.7049
O3 O 0.5840 0.5000 0.5623
O4 O 0.6054 0.7500 0.4233
O5 O 0.6701 0.0000 0.3414
O6 O 0.7592 0.2500 0.3320
O7 O 0.7038 0.0000 0.1889
O8 O 0.6351 0.0000 0.8357
O9 O 0.6502 0.0000 0.6680
O10 O 0.6899 0.0000 0.5215
O11 O 0.6916 0.0000 0.0088
O12 O 0.7274 0.7499 0.8835
T1 Si 0.5515 0.5000 0.6424
T2 Si 0.5770 0.5000 0.4529
T3 Si 0.7230 0.0000 0.2993
T4 Si 0.6054 0.0000 0.7282
T5 Si 0.6428 0.0000 0.4278
T6 Si 0.7053 0.0000 0.6319
T7 Si 0.6953 0.0000 0.9032
T8 Si 0.7348 0.0000 0.1069
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