The structure described by SFEr is Matlockite structured and crystallizes in the tetragonal P4/nmm space group. Er(1) is bonded in a 9-coordinate geometry to five equivalent S(1) and four equivalent F(1) atoms. S(1) is bonded to five equivalent Er(1) atoms to form distorted SEr5 trigonal bipyramids that share corners with twelve equivalent F(1)Er4 tetrahedra, corners with four equivalent S(1)Er5 trigonal bipyramids, edges with four equivalent F(1)Er4 tetrahedra, and edges with eight equivalent S(1)Er5 trigonal bipyramids. F(1) is bonded to four equivalent Er(1) atoms to form FEr4 tetrahedra that share corners with four equivalent F(1)Er4 tetrahedra, corners with twelve equivalent S(1)Er5 trigonal bipyramids, edges with four equivalent F(1)Er4 tetrahedra, and edges with four equivalent S(1)Er5 trigonal bipyramids. is represented by the CIF file [CIF]
data_ErSF
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.720
_cell_length_b   3.720
_cell_length_c   6.770
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   93.687
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Er  Er0  1  0.750  0.750  0.773  1.0
  Er  Er1  1  0.250  0.250  0.227  1.0
  S  S2  1  0.250  0.250  0.645  1.0
  S  S3  1  0.750  0.750  0.355  1.0
  F  F4  1  0.250  0.750  0.000  1.0
  F  F5  1  0.750  0.250  0.000  1.0
[/CIF]
.
The structure described by SFEr is Matlockite structured and crystallizes in the tetragonal P4/nmm space group. Er(1) is bonded in a 9-coordinate geometry to five equivalent S(1) and four equivalent F(1) atoms. S(1) is bonded to five equivalent Er(1) atoms to form distorted SEr5 trigonal bipyramids that share corners with twelve equivalent F(1)Er4 tetrahedra, corners with four equivalent S(1)Er5 trigonal bipyramids, edges with four equivalent F(1)Er4 tetrahedra, and edges with eight equivalent S(1)Er5 trigonal bipyramids. F(1) is bonded to four equivalent Er(1) atoms to form FEr4 tetrahedra that share corners with four equivalent F(1)Er4 tetrahedra, corners with twelve equivalent S(1)Er5 trigonal bipyramids, edges with four equivalent F(1)Er4 tetrahedra, and edges with four equivalent S(1)Er5 trigonal bipyramids. is represented by the CIF file [CIF]
data_ErSF
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.720
_cell_length_b   3.720
_cell_length_c   6.770
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   93.687
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Er  Er0  1  0.750  0.750  0.773  1.0
  Er  Er1  1  0.250  0.250  0.227  1.0
  S  S2  1  0.250  0.250  0.645  1.0
  S  S3  1  0.750  0.750  0.355  1.0
  F  F4  1  0.250  0.750  0.000  1.0
  F  F5  1  0.750  0.250  0.000  1.0
[/CIF]
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