/usr/share/avogadro/crystals/zeolites/DAC.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 18.5740(0)
_cell_length_b 7.5420(0)
_cell_length_c 10.3770(0)
_cell_angle_alpha 90.0000(0)
_cell_angle_beta 108.9170(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 0.1382 0.1743 0.7765
O2 O 0.2500 0.2500 0.0000
O3 O 0.2741 0.2492 0.7642
O4 O 0.1905 0.5000 0.8204
O5 O 0.1662 0.5000 0.3465
O6 O 0.2500 0.2500 0.5000
O7 O 0.1143 0.1742 0.3300
O8 O 0.0096 0.0000 0.6777
O9 O 0.1091 0.0000 0.5460
T1 Si 0.2133 0.2935 0.8404
T2 Si 0.1894 0.2938 0.3533
T3 Si 0.0987 0.0000 0.6940
T4 Si 0.0819 0.0000 0.3821
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