/usr/share/avogadro/crystals/zeolites/MEI.cif is in avogadro-data 1.2.0-3.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | data_MEI
#**************************************************************************
#
# 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 13.1140(0)
_cell_length_b 13.1140(0)
_cell_length_c 15.5630(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 63/m'
_symmetry_Int_Tables_number 176
_symmetry_cell_setting hexagonal
loop_
_symmetry_equiv_pos_as_xyz
'+x,+y,+z'
'-y,+x-y,+z'
'-x+y,-x,+z'
'-x,-y,1/2+z'
'+y,-x+y,1/2+z'
'+x-y,+x,1/2+z'
'-x,-y,-z'
'+y,-x+y,-z'
'+x-y,+x,-z'
'+x,+y,1/2-z'
'-y,+x-y,1/2-z'
'-x+y,-x,1/2-z'
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
O1 O 0.8030 0.2269 0.5039
O2 O 0.6496 0.2101 0.3881
O3 O 0.6461 0.0192 0.4444
O4 O 0.5800 0.1358 0.5458
O5 O 0.4498 0.1563 0.6655
O6 O 0.5645 0.3563 0.7500
O7 O 0.6667 0.3333 0.2500
T1 Si 0.6696 0.1479 0.4705
T2 Si 0.4519 0.1174 0.5677
T3 Si 0.5265 0.2189 0.7500
T4 Si 0.6667 0.3333 0.3533
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