/usr/share/avogadro/crystals/zeolites/SFF.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 11.4540(0)
_cell_length_b 21.6950(0)
_cell_length_c 7.2270(0)
_cell_angle_alpha 90.0000(0)
_cell_angle_beta 93.1540(0)
_cell_angle_gamma 90.0000(0)
_symmetry_space_group_name_H-M 'P 21/m'
_symmetry_Int_Tables_number 11
_symmetry_cell_setting monoclinic
loop_
_symmetry_equiv_pos_as_xyz
'+x,+y,+z'
'-x,1/2+y,-z'
'-x,-y,-z'
'+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 0.2250 0.9248 0.0097
O2 O 0.3203 0.9758 0.7250
O3 O 0.3589 0.0218 0.0614
O4 O 0.1523 0.0334 0.8902
O5 O 0.0286 0.6079 0.1544
O6 O 0.2241 0.6673 0.2451
O7 O 0.1226 0.6790 0.9101
O8 O 0.2735 0.7500 0.5031
O9 O 0.3266 0.6334 0.5650
O10 O 0.1071 0.6688 0.5473
O11 O 0.3857 0.5344 0.3834
O12 O 0.5221 0.5751 0.6608
O13 O 0.9341 0.6309 0.7423
O14 O 0.9785 0.7500 0.7128
O15 O 0.9475 0.9899 0.7722
O16 O 0.0677 0.0613 0.5559
O17 O 0.2495 0.0627 0.3482
T1 Si 0.2643 0.9890 0.9205
T2 Si 0.1502 0.6324 0.0804
T3 Si 0.2333 0.6798 0.4650
T4 Si 0.3882 0.5669 0.5839
T5 Si 0.0350 0.6820 0.7282
T6 Si 0.0347 0.0480 0.7656
T7 Si 0.1092 0.0663 0.3473
T8 Si 0.3679 0.0315 0.2828
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