The material described by MgV4As2O13 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(11), one O(13), one O(4), one O(7), and one O(8) atom to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  an edgeedge with one As(2)O4 tetrahedra,  an edgeedge with one V(3)O5 trigonal bipyramid, and edges with two equivalent V(4)O5 trigonal bipyramids. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(10), one O(2), one O(3), and one O(9) atom to form distorted VO5 trigonal bipyramids that share corners with two equivalent V(2)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  an edgeedge with one V(2)O6 octahedra, and  an edgeedge with one V(3)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 24-31°. In the second V site, V(2) is bonded to one O(1), one O(12), one O(2), one O(3), one O(5), and one O(9) atom to form VO6 octahedra that share  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one V(3)O5 trigonal bipyramid,  a cornercorner with one V(4)O5 trigonal bipyramid, corners with two equivalent V(1)O5 trigonal bipyramids, and  an edgeedge with one V(1)O5 trigonal bipyramid. In the third V site, V(3) is bonded to one O(10), one O(11), one O(3), one O(4), and one O(6) atom to form distorted VO5 trigonal bipyramids that share  a cornercorner with one V(2)O6 octahedra, corners with three equivalent As(1)O4 tetrahedra,  a cornercorner with one V(4)O5 trigonal bipyramid,  an edgeedge with one Mg(1)O5 trigonal bipyramid, and  an edgeedge with one V(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 30°. In the fourth V site, V(4) is bonded to one O(13), one O(4), one O(5), one O(7), and one O(8) atom to form distorted VO5 trigonal bipyramids that share  a cornercorner with one V(2)O6 octahedra, corners with three equivalent As(2)O4 tetrahedra,  a cornercorner with one V(3)O5 trigonal bipyramid, and edges with two equivalent Mg(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 8°. There are two inequivalent As sites. In the first As site, As(1) is bonded to one O(10), one O(11), one O(12), and one O(6) atom to form AsO4 tetrahedra that share  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one V(1)O5 trigonal bipyramid, and corners with three equivalent V(3)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 38°. In the second As site, As(2) is bonded to one O(13), one O(7), one O(8), and one O(9) atom to form AsO4 tetrahedra that share  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one V(1)O5 trigonal bipyramid, corners with three equivalent V(4)O5 trigonal bipyramids, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 51°. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one V(1) and one V(2) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one V(1) and one V(2) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one V(1), one V(2), and one V(3) atom. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Mg(1), one V(3), and one V(4) atom. In the fifth O site, O(5) is bonded in a linear geometry to one V(2) and one V(4) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one V(3) and one As(1) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Mg(1), one V(4), and one As(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(4), and one As(2) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one V(1), one V(2), and one As(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one V(1), one V(3), and one As(1) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(3), and one As(1) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one V(2) and one As(1) atom. In the thirteenth O site, O(13) is bonded in a T-shaped geometry to one Mg(1), one V(4), and one As(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgV4As2O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.343
_cell_length_b   5.183
_cell_length_c   10.242
_cell_angle_alpha   79.698
_cell_angle_beta   77.408
_cell_angle_gamma   82.330
_symmetry_Int_Tables_number   1
_cell_volume   271.040
_cell_formula_units_Z   1
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
  Mg  Mg0  1  0.989  0.557  0.847  1.0
  V  V1  1  0.969  0.120  0.348  1.0
  V  V2  1  0.581  0.737  0.290  1.0
  V  V3  1  0.711  0.904  0.636  1.0
  V  V4  1  0.459  0.543  0.983  1.0
  As  As5  1  0.218  0.357  0.560  1.0
  As  As6  1  0.991  0.063  0.019  1.0
  O  O7  1  0.870  0.444  0.298  1.0
  O  O8  1  0.315  0.987  0.306  1.0
  O  O9  1  0.734  0.874  0.445  1.0
  O  O10  1  0.643  0.733  0.819  1.0
  O  O11  1  0.539  0.648  0.126  1.0
  O  O12  1  0.410  0.171  0.662  1.0
  O  O13  1  0.766  0.248  0.936  1.0
  O  O14  1  0.117  0.786  0.951  1.0
  O  O15  1  0.875  0.982  0.190  1.0
  O  O16  1  0.985  0.164  0.541  1.0
  O  O17  1  0.065  0.607  0.648  1.0
  O  O18  1  0.364  0.462  0.400  1.0
  O  O19  1  0.221  0.283  0.975  1.0
[/CIF]
.
The material described by MgV4As2O13 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(11), one O(13), one O(4), one O(7), and one O(8) atom to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  an edgeedge with one As(2)O4 tetrahedra,  an edgeedge with one V(3)O5 trigonal bipyramid, and edges with two equivalent V(4)O5 trigonal bipyramids. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(10), one O(2), one O(3), and one O(9) atom to form distorted VO5 trigonal bipyramids that share corners with two equivalent V(2)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  an edgeedge with one V(2)O6 octahedra, and  an edgeedge with one V(3)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 24-31°. In the second V site, V(2) is bonded to one O(1), one O(12), one O(2), one O(3), one O(5), and one O(9) atom to form VO6 octahedra that share  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra,  a cornercorner with one V(3)O5 trigonal bipyramid,  a cornercorner with one V(4)O5 trigonal bipyramid, corners with two equivalent V(1)O5 trigonal bipyramids, and  an edgeedge with one V(1)O5 trigonal bipyramid. In the third V site, V(3) is bonded to one O(10), one O(11), one O(3), one O(4), and one O(6) atom to form distorted VO5 trigonal bipyramids that share  a cornercorner with one V(2)O6 octahedra, corners with three equivalent As(1)O4 tetrahedra,  a cornercorner with one V(4)O5 trigonal bipyramid,  an edgeedge with one Mg(1)O5 trigonal bipyramid, and  an edgeedge with one V(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 30°. In the fourth V site, V(4) is bonded to one O(13), one O(4), one O(5), one O(7), and one O(8) atom to form distorted VO5 trigonal bipyramids that share  a cornercorner with one V(2)O6 octahedra, corners with three equivalent As(2)O4 tetrahedra,  a cornercorner with one V(3)O5 trigonal bipyramid, and edges with two equivalent Mg(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 8°. There are two inequivalent As sites. In the first As site, As(1) is bonded to one O(10), one O(11), one O(12), and one O(6) atom to form AsO4 tetrahedra that share  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one V(1)O5 trigonal bipyramid, and corners with three equivalent V(3)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 38°. In the second As site, As(2) is bonded to one O(13), one O(7), one O(8), and one O(9) atom to form AsO4 tetrahedra that share  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one V(1)O5 trigonal bipyramid, corners with three equivalent V(4)O5 trigonal bipyramids, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 51°. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one V(1) and one V(2) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one V(1) and one V(2) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one V(1), one V(2), and one V(3) atom. In the fourth O site, O(4) is bonded in a T-shaped geometry to one Mg(1), one V(3), and one V(4) atom. In the fifth O site, O(5) is bonded in a linear geometry to one V(2) and one V(4) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one V(3) and one As(1) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Mg(1), one V(4), and one As(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(4), and one As(2) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one V(1), one V(2), and one As(2) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one V(1), one V(3), and one As(1) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(3), and one As(1) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one V(2) and one As(1) atom. In the thirteenth O site, O(13) is bonded in a T-shaped geometry to one Mg(1), one V(4), and one As(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgV4As2O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.343
_cell_length_b   5.183
_cell_length_c   10.242
_cell_angle_alpha   79.698
_cell_angle_beta   77.408
_cell_angle_gamma   82.330
_symmetry_Int_Tables_number   1
_cell_volume   271.040
_cell_formula_units_Z   1
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
  Mg  Mg0  1  0.989  0.557  0.847  1.0
  V  V1  1  0.969  0.120  0.348  1.0
  V  V2  1  0.581  0.737  0.290  1.0
  V  V3  1  0.711  0.904  0.636  1.0
  V  V4  1  0.459  0.543  0.983  1.0
  As  As5  1  0.218  0.357  0.560  1.0
  As  As6  1  0.991  0.063  0.019  1.0
  O  O7  1  0.870  0.444  0.298  1.0
  O  O8  1  0.315  0.987  0.306  1.0
  O  O9  1  0.734  0.874  0.445  1.0
  O  O10  1  0.643  0.733  0.819  1.0
  O  O11  1  0.539  0.648  0.126  1.0
  O  O12  1  0.410  0.171  0.662  1.0
  O  O13  1  0.766  0.248  0.936  1.0
  O  O14  1  0.117  0.786  0.951  1.0
  O  O15  1  0.875  0.982  0.190  1.0
  O  O16  1  0.985  0.164  0.541  1.0
  O  O17  1  0.065  0.607  0.648  1.0
  O  O18  1  0.364  0.462  0.400  1.0
  O  O19  1  0.221  0.283  0.975  1.0
[/CIF]
.