The material described by Sc7As3 crystallizes in the tetragonal I4/mcm space group. There are five inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in a 4-coordinate geometry to one Sc(5), two equivalent As(1), and two equivalent As(2) atoms. In the second Sc site, Sc(2) is bonded to one As(2) and four equivalent As(1) atoms to form a mixture of distorted corner and edge-sharing ScAs5 trigonal bipyramids. In the third Sc site, Sc(3) is bonded in a 3-coordinate geometry to two equivalent Sc(5), one As(2), and two equivalent As(1) atoms. In the fourth Sc site, Sc(4) is bonded in a square co-planar geometry to four equivalent As(1) atoms. In the fifth Sc site, Sc(5) is bonded in a 12-coordinate geometry to four equivalent Sc(1) and eight equivalent Sc(3) atoms. There are two inequivalent As sites. In the first As site, As(2) is bonded in a 8-coordinate geometry to two equivalent Sc(2), two equivalent Sc(3), and four equivalent Sc(1) atoms. In the second As site, As(1) is bonded in a 9-coordinate geometry to one Sc(4), two equivalent Sc(1), two equivalent Sc(3), and four equivalent Sc(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sc7As3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.982
_cell_length_b   10.982
_cell_length_c   10.981
_cell_angle_alpha   97.689
_cell_angle_beta   97.689
_cell_angle_gamma   137.088
_symmetry_Int_Tables_number   1
_cell_volume   839.206
_cell_formula_units_Z   4
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
  Sc  Sc0  1  0.137  0.637  0.164  1.0
  Sc  Sc1  1  0.473  0.973  0.836  1.0
  Sc  Sc2  1  0.973  0.136  0.500  1.0
  Sc  Sc3  1  0.636  0.473  0.500  1.0
  Sc  Sc4  1  0.863  0.363  0.836  1.0
  Sc  Sc5  1  0.527  0.027  0.164  1.0
  Sc  Sc6  1  0.027  0.864  0.500  1.0
  Sc  Sc7  1  0.364  0.527  0.500  1.0
  Sc  Sc8  1  0.625  0.619  0.245  1.0
  Sc  Sc9  1  0.375  0.381  0.755  1.0
  Sc  Sc10  1  0.875  0.119  0.994  1.0
  Sc  Sc11  1  0.125  0.881  0.006  1.0
  Sc  Sc12  1  0.619  0.375  0.994  1.0
  Sc  Sc13  1  0.381  0.625  0.006  1.0
  Sc  Sc14  1  0.119  0.125  0.245  1.0
  Sc  Sc15  1  0.881  0.875  0.755  1.0
  Sc  Sc16  1  0.519  0.828  0.347  1.0
  Sc  Sc17  1  0.481  0.172  0.653  1.0
  Sc  Sc18  1  0.981  0.328  0.309  1.0
  Sc  Sc19  1  0.019  0.672  0.691  1.0
  Sc  Sc20  1  0.828  0.481  0.309  1.0
  Sc  Sc21  1  0.172  0.519  0.691  1.0
  Sc  Sc22  1  0.328  0.019  0.347  1.0
  Sc  Sc23  1  0.672  0.981  0.653  1.0
  Sc  Sc24  1  0.250  0.250  0.000  1.0
  Sc  Sc25  1  0.750  0.750  0.000  1.0
  Sc  Sc26  1  0.750  0.250  0.500  1.0
  Sc  Sc27  1  0.250  0.750  0.500  1.0
  As  As28  1  0.250  0.444  0.194  1.0
  As  As29  1  0.250  0.056  0.806  1.0
  As  As30  1  0.750  0.944  0.194  1.0
  As  As31  1  0.750  0.556  0.806  1.0
  As  As32  1  0.444  0.250  0.194  1.0
  As  As33  1  0.056  0.250  0.806  1.0
  As  As34  1  0.944  0.750  0.194  1.0
  As  As35  1  0.556  0.750  0.806  1.0
  As  As36  1  0.220  0.720  0.941  1.0
  As  As37  1  0.780  0.280  0.059  1.0
  As  As38  1  0.280  0.220  0.500  1.0
  As  As39  1  0.720  0.780  0.500  1.0
[/CIF]
.
The material described by Sc7As3 crystallizes in the tetragonal I4/mcm space group. There are five inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in a 4-coordinate geometry to one Sc(5), two equivalent As(1), and two equivalent As(2) atoms. In the second Sc site, Sc(2) is bonded to one As(2) and four equivalent As(1) atoms to form a mixture of distorted corner and edge-sharing ScAs5 trigonal bipyramids. In the third Sc site, Sc(3) is bonded in a 3-coordinate geometry to two equivalent Sc(5), one As(2), and two equivalent As(1) atoms. In the fourth Sc site, Sc(4) is bonded in a square co-planar geometry to four equivalent As(1) atoms. In the fifth Sc site, Sc(5) is bonded in a 12-coordinate geometry to four equivalent Sc(1) and eight equivalent Sc(3) atoms. There are two inequivalent As sites. In the first As site, As(2) is bonded in a 8-coordinate geometry to two equivalent Sc(2), two equivalent Sc(3), and four equivalent Sc(1) atoms. In the second As site, As(1) is bonded in a 9-coordinate geometry to one Sc(4), two equivalent Sc(1), two equivalent Sc(3), and four equivalent Sc(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sc7As3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.982
_cell_length_b   10.982
_cell_length_c   10.981
_cell_angle_alpha   97.689
_cell_angle_beta   97.689
_cell_angle_gamma   137.088
_symmetry_Int_Tables_number   1
_cell_volume   839.206
_cell_formula_units_Z   4
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
  Sc  Sc0  1  0.137  0.637  0.164  1.0
  Sc  Sc1  1  0.473  0.973  0.836  1.0
  Sc  Sc2  1  0.973  0.136  0.500  1.0
  Sc  Sc3  1  0.636  0.473  0.500  1.0
  Sc  Sc4  1  0.863  0.363  0.836  1.0
  Sc  Sc5  1  0.527  0.027  0.164  1.0
  Sc  Sc6  1  0.027  0.864  0.500  1.0
  Sc  Sc7  1  0.364  0.527  0.500  1.0
  Sc  Sc8  1  0.625  0.619  0.245  1.0
  Sc  Sc9  1  0.375  0.381  0.755  1.0
  Sc  Sc10  1  0.875  0.119  0.994  1.0
  Sc  Sc11  1  0.125  0.881  0.006  1.0
  Sc  Sc12  1  0.619  0.375  0.994  1.0
  Sc  Sc13  1  0.381  0.625  0.006  1.0
  Sc  Sc14  1  0.119  0.125  0.245  1.0
  Sc  Sc15  1  0.881  0.875  0.755  1.0
  Sc  Sc16  1  0.519  0.828  0.347  1.0
  Sc  Sc17  1  0.481  0.172  0.653  1.0
  Sc  Sc18  1  0.981  0.328  0.309  1.0
  Sc  Sc19  1  0.019  0.672  0.691  1.0
  Sc  Sc20  1  0.828  0.481  0.309  1.0
  Sc  Sc21  1  0.172  0.519  0.691  1.0
  Sc  Sc22  1  0.328  0.019  0.347  1.0
  Sc  Sc23  1  0.672  0.981  0.653  1.0
  Sc  Sc24  1  0.250  0.250  0.000  1.0
  Sc  Sc25  1  0.750  0.750  0.000  1.0
  Sc  Sc26  1  0.750  0.250  0.500  1.0
  Sc  Sc27  1  0.250  0.750  0.500  1.0
  As  As28  1  0.250  0.444  0.194  1.0
  As  As29  1  0.250  0.056  0.806  1.0
  As  As30  1  0.750  0.944  0.194  1.0
  As  As31  1  0.750  0.556  0.806  1.0
  As  As32  1  0.444  0.250  0.194  1.0
  As  As33  1  0.056  0.250  0.806  1.0
  As  As34  1  0.944  0.750  0.194  1.0
  As  As35  1  0.556  0.750  0.806  1.0
  As  As36  1  0.220  0.720  0.941  1.0
  As  As37  1  0.780  0.280  0.059  1.0
  As  As38  1  0.280  0.220  0.500  1.0
  As  As39  1  0.720  0.780  0.500  1.0
[/CIF]
.