/usr/share/avogadro/crystals/zeolites/CHA.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 13.6750(0)
_cell_length_b 13.6750(0)
_cell_length_c 14.7670(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 'R -3 m'
_symmetry_Int_Tables_number 166
_symmetry_cell_setting trigonal
loop_
_symmetry_equiv_pos_as_xyz
'+x,+y,+z'
'2/3+x,1/3+y,1/3+z'
'1/3+x,2/3+y,2/3+z'
'-y,+x-y,+z'
'2/3-y,1/3+x-y,1/3+z'
'1/3-y,2/3+x-y,2/3+z'
'-x+y,-x,+z'
'2/3-x+y,1/3-x,1/3+z'
'1/3-x+y,2/3-x,2/3+z'
'-y,-x,+z'
'2/3-y,1/3-x,1/3+z'
'1/3-y,2/3-x,2/3+z'
'-x+y,+y,+z'
'2/3-x+y,1/3+y,1/3+z'
'1/3-x+y,2/3+y,2/3+z'
'+x,+x-y,+z'
'2/3+x,1/3+x-y,1/3+z'
'1/3+x,2/3+x-y,2/3+z'
'-x,-y,-z'
'2/3-x,1/3-y,1/3-z'
'1/3-x,2/3-y,2/3-z'
'+y,-x+y,-z'
'2/3+y,1/3-x+y,1/3-z'
'1/3+y,2/3-x+y,2/3-z'
'+x-y,+x,-z'
'2/3+x-y,1/3+x,1/3-z'
'1/3+x-y,2/3+x,2/3-z'
'+y,+x,-z'
'2/3+y,1/3+x,1/3-z'
'1/3+y,2/3+x,2/3-z'
'+x-y,-y,-z'
'2/3+x-y,1/3-y,1/3-z'
'1/3+x-y,2/3-y,2/3-z'
'-x,-x+y,-z'
'2/3-x,1/3-x+y,1/3-z'
'1/3-x,2/3-x+y,2/3-z'
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
O1 O 0.9020 0.0980 0.1227
O2 O 0.9767 0.3101 0.1667
O3 O 0.1203 0.2405 0.1315
O4 O 0.0000 0.2577 0.0000
T1 Si 0.9997 0.2264 0.1051
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