The structure described by LaSiAs3 crystallizes in the orthorhombic Pbca space group. La(1) is bonded in a 9-coordinate geometry to one As(2), four equivalent As(1), and four equivalent As(3) atoms. Si(1) is bonded to one As(3) and three equivalent As(2) atoms to form corner-sharing SiAs4 tetrahedra. There are three inequivalent As sites. In the first As site, As(1) is bonded in a 8-coordinate geometry to four equivalent La(1) and four equivalent As(1) atoms. In the second As site, As(2) is bonded in a distorted rectangular see-saw-like geometry to one La(1) and three equivalent Si(1) atoms. In the third As site, As(3) is bonded to four equivalent La(1) and one Si(1) atom to form a mixture of distorted edge and corner-sharing AsLa4Si trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_LaSiAs3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.919
_cell_length_b   6.050
_cell_length_c   26.602
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   952.557
_cell_formula_units_Z   8
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
  La  La0  1  0.002  0.999  0.092  1.0
  La  La1  1  0.002  0.499  0.408  1.0
  La  La2  1  0.998  0.501  0.592  1.0
  La  La3  1  0.498  0.499  0.908  1.0
  La  La4  1  0.998  0.001  0.908  1.0
  La  La5  1  0.502  0.501  0.092  1.0
  La  La6  1  0.502  0.001  0.408  1.0
  La  La7  1  0.498  0.999  0.592  1.0
  Si  Si8  1  0.918  0.413  0.207  1.0
  Si  Si9  1  0.582  0.413  0.707  1.0
  Si  Si10  1  0.918  0.913  0.293  1.0
  Si  Si11  1  0.082  0.087  0.707  1.0
  Si  Si12  1  0.418  0.587  0.293  1.0
  Si  Si13  1  0.082  0.587  0.793  1.0
  Si  Si14  1  0.418  0.087  0.207  1.0
  Si  Si15  1  0.582  0.913  0.793  1.0
  As  As16  1  0.250  0.750  0.500  1.0
  As  As17  1  0.022  0.541  0.288  1.0
  As  As18  1  0.522  0.459  0.212  1.0
  As  As19  1  0.022  0.041  0.212  1.0
  As  As20  1  0.496  0.004  0.875  1.0
  As  As21  1  0.496  0.504  0.625  1.0
  As  As22  1  0.250  0.750  0.000  1.0
  As  As23  1  0.750  0.750  0.000  1.0
  As  As24  1  0.478  0.541  0.788  1.0
  As  As25  1  0.504  0.496  0.375  1.0
  As  As26  1  0.750  0.250  0.500  1.0
  As  As27  1  0.996  0.496  0.875  1.0
  As  As28  1  0.004  0.004  0.375  1.0
  As  As29  1  0.522  0.959  0.288  1.0
  As  As30  1  0.978  0.459  0.712  1.0
  As  As31  1  0.750  0.250  1.000  1.0
  As  As32  1  0.504  0.996  0.125  1.0
  As  As33  1  0.004  0.504  0.125  1.0
  As  As34  1  0.478  0.041  0.712  1.0
  As  As35  1  0.978  0.959  0.788  1.0
  As  As36  1  0.996  0.996  0.625  1.0
  As  As37  1  0.250  0.250  0.500  1.0
  As  As38  1  0.250  0.250  1.000  1.0
  As  As39  1  0.750  0.750  0.500  1.0
[/CIF]
.
The structure described by LaSiAs3 crystallizes in the orthorhombic Pbca space group. La(1) is bonded in a 9-coordinate geometry to one As(2), four equivalent As(1), and four equivalent As(3) atoms. Si(1) is bonded to one As(3) and three equivalent As(2) atoms to form corner-sharing SiAs4 tetrahedra. There are three inequivalent As sites. In the first As site, As(1) is bonded in a 8-coordinate geometry to four equivalent La(1) and four equivalent As(1) atoms. In the second As site, As(2) is bonded in a distorted rectangular see-saw-like geometry to one La(1) and three equivalent Si(1) atoms. In the third As site, As(3) is bonded to four equivalent La(1) and one Si(1) atom to form a mixture of distorted edge and corner-sharing AsLa4Si trigonal bipyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_LaSiAs3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.919
_cell_length_b   6.050
_cell_length_c   26.602
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   952.557
_cell_formula_units_Z   8
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
  La  La0  1  0.002  0.999  0.092  1.0
  La  La1  1  0.002  0.499  0.408  1.0
  La  La2  1  0.998  0.501  0.592  1.0
  La  La3  1  0.498  0.499  0.908  1.0
  La  La4  1  0.998  0.001  0.908  1.0
  La  La5  1  0.502  0.501  0.092  1.0
  La  La6  1  0.502  0.001  0.408  1.0
  La  La7  1  0.498  0.999  0.592  1.0
  Si  Si8  1  0.918  0.413  0.207  1.0
  Si  Si9  1  0.582  0.413  0.707  1.0
  Si  Si10  1  0.918  0.913  0.293  1.0
  Si  Si11  1  0.082  0.087  0.707  1.0
  Si  Si12  1  0.418  0.587  0.293  1.0
  Si  Si13  1  0.082  0.587  0.793  1.0
  Si  Si14  1  0.418  0.087  0.207  1.0
  Si  Si15  1  0.582  0.913  0.793  1.0
  As  As16  1  0.250  0.750  0.500  1.0
  As  As17  1  0.022  0.541  0.288  1.0
  As  As18  1  0.522  0.459  0.212  1.0
  As  As19  1  0.022  0.041  0.212  1.0
  As  As20  1  0.496  0.004  0.875  1.0
  As  As21  1  0.496  0.504  0.625  1.0
  As  As22  1  0.250  0.750  0.000  1.0
  As  As23  1  0.750  0.750  0.000  1.0
  As  As24  1  0.478  0.541  0.788  1.0
  As  As25  1  0.504  0.496  0.375  1.0
  As  As26  1  0.750  0.250  0.500  1.0
  As  As27  1  0.996  0.496  0.875  1.0
  As  As28  1  0.004  0.004  0.375  1.0
  As  As29  1  0.522  0.959  0.288  1.0
  As  As30  1  0.978  0.459  0.712  1.0
  As  As31  1  0.750  0.250  1.000  1.0
  As  As32  1  0.504  0.996  0.125  1.0
  As  As33  1  0.004  0.504  0.125  1.0
  As  As34  1  0.478  0.041  0.712  1.0
  As  As35  1  0.978  0.959  0.788  1.0
  As  As36  1  0.996  0.996  0.625  1.0
  As  As37  1  0.250  0.250  0.500  1.0
  As  As38  1  0.250  0.250  1.000  1.0
  As  As39  1  0.750  0.750  0.500  1.0
[/CIF]
.