The structure described by MgV4As2O13 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(10), one O(11), one O(12), one O(3), and one O(4) atom to form distorted MgO6 octahedra that share  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one V(1)O5 trigonal bipyramid,  an edgeedge with one As(1)O4 tetrahedra,  an edgeedge with one V(1)O5 trigonal bipyramid,  a faceface with one V(2)O6 octahedra, and  a faceface with one V(3)O6 octahedra. The corner-sharing octahedral tilt angles are 80°. 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  a cornercorner with one Mg(1)O6 octahedra, 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 Mg(1)O6 octahedra,  an edgeedge with one V(2)O6 octahedra, and  an edgeedge with one V(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-51°. 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 distorted VO6 octahedra that share  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra, corners with two equivalent V(1)O5 trigonal bipyramids,  an edgeedge with one V(1)O5 trigonal bipyramid, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles are 25°. In the third V site, V(3) is bonded to one O(10), one O(11), one O(3), one O(4), one O(6), and one O(7) atom to form distorted VO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one As(2)O4 tetrahedra, corners with three equivalent As(1)O4 tetrahedra,  an edgeedge with one V(1)O5 trigonal bipyramid, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 25-80°. In the fourth V site, V(4) is bonded in a 6-coordinate geometry to one O(13), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. 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 Mg(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra, corners with three equivalent V(3)O6 octahedra,  a cornercorner with one V(1)O5 trigonal bipyramid, and  an edgeedge with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 21-76°. 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 V(3)O6 octahedra, and  a cornercorner with one V(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 45-56°. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Mg(1), one V(1), and one V(2) atom. In the second O site, O(2) is bonded in a linear geometry to one V(1) and one V(2) atom. In the third O site, O(3) is bonded in a distorted see-saw-like geometry to one Mg(1), one V(1), one V(2), and one V(3) atom. In the fourth O site, O(4) is bonded in a 3-coordinate 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 trigonal non-coplanar geometry to one V(3), one V(4), and one As(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one V(3), one V(4), and one As(2) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one V(4) and one As(2) atom. In the ninth O site, O(9) is bonded in a distorted 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 trigonal pyramidal geometry to one Mg(1), one V(1), one V(3), and one As(1) atom. In the eleventh O site, O(11) is bonded in a distorted T-shaped geometry to one Mg(1), one V(3), and one As(1) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Mg(1), one V(2), and one As(1) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one V(4) and one As(2) atom. is represented by the CIF file [CIF]
data_MgV4As2O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.398
_cell_length_b   5.186
_cell_length_c   9.148
_cell_angle_alpha   86.932
_cell_angle_beta   79.879
_cell_angle_gamma   81.903
_symmetry_Int_Tables_number   1
_cell_volume   249.476
_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  0.746  0.566  0.542  1.0
  V  V1  1  0.967  0.116  0.345  1.0
  V  V2  1  0.600  0.738  0.275  1.0
  V  V3  1  0.731  0.989  0.694  1.0
  V  V4  1  0.439  0.497  0.933  1.0
  As  As5  1  0.228  0.419  0.605  1.0
  As  As6  1  0.003  0.036  0.996  1.0
  O  O7  1  0.882  0.470  0.316  1.0
  O  O8  1  0.269  0.939  0.311  1.0
  O  O9  1  0.713  0.933  0.464  1.0
  O  O10  1  0.580  0.688  0.757  1.0
  O  O11  1  0.545  0.589  0.084  1.0
  O  O12  1  0.394  0.254  0.735  1.0
  O  O13  1  0.783  0.166  0.884  1.0
  O  O14  1  0.114  0.725  0.943  1.0
  O  O15  1  0.820  0.001  0.176  1.0
  O  O16  1  0.992  0.235  0.570  1.0
  O  O17  1  0.052  0.712  0.639  1.0
  O  O18  1  0.453  0.462  0.454  1.0
  O  O19  1  0.222  0.219  0.028  1.0
[/CIF]
.
The structure described by MgV4As2O13 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(10), one O(11), one O(12), one O(3), and one O(4) atom to form distorted MgO6 octahedra that share  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one V(1)O5 trigonal bipyramid,  an edgeedge with one As(1)O4 tetrahedra,  an edgeedge with one V(1)O5 trigonal bipyramid,  a faceface with one V(2)O6 octahedra, and  a faceface with one V(3)O6 octahedra. The corner-sharing octahedral tilt angles are 80°. 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  a cornercorner with one Mg(1)O6 octahedra, 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 Mg(1)O6 octahedra,  an edgeedge with one V(2)O6 octahedra, and  an edgeedge with one V(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 1-51°. 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 distorted VO6 octahedra that share  a cornercorner with one V(3)O6 octahedra,  a cornercorner with one As(1)O4 tetrahedra,  a cornercorner with one As(2)O4 tetrahedra, corners with two equivalent V(1)O5 trigonal bipyramids,  an edgeedge with one V(1)O5 trigonal bipyramid, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles are 25°. In the third V site, V(3) is bonded to one O(10), one O(11), one O(3), one O(4), one O(6), and one O(7) atom to form distorted VO6 octahedra that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra,  a cornercorner with one As(2)O4 tetrahedra, corners with three equivalent As(1)O4 tetrahedra,  an edgeedge with one V(1)O5 trigonal bipyramid, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 25-80°. In the fourth V site, V(4) is bonded in a 6-coordinate geometry to one O(13), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. 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 Mg(1)O6 octahedra,  a cornercorner with one V(2)O6 octahedra, corners with three equivalent V(3)O6 octahedra,  a cornercorner with one V(1)O5 trigonal bipyramid, and  an edgeedge with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 21-76°. 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 V(3)O6 octahedra, and  a cornercorner with one V(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 45-56°. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Mg(1), one V(1), and one V(2) atom. In the second O site, O(2) is bonded in a linear geometry to one V(1) and one V(2) atom. In the third O site, O(3) is bonded in a distorted see-saw-like geometry to one Mg(1), one V(1), one V(2), and one V(3) atom. In the fourth O site, O(4) is bonded in a 3-coordinate 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 trigonal non-coplanar geometry to one V(3), one V(4), and one As(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one V(3), one V(4), and one As(2) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one V(4) and one As(2) atom. In the ninth O site, O(9) is bonded in a distorted 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 trigonal pyramidal geometry to one Mg(1), one V(1), one V(3), and one As(1) atom. In the eleventh O site, O(11) is bonded in a distorted T-shaped geometry to one Mg(1), one V(3), and one As(1) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Mg(1), one V(2), and one As(1) atom. In the thirteenth O site, O(13) is bonded in a bent 150 degrees geometry to one V(4) and one As(2) atom. is represented by the CIF file [CIF]
data_MgV4As2O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.398
_cell_length_b   5.186
_cell_length_c   9.148
_cell_angle_alpha   86.932
_cell_angle_beta   79.879
_cell_angle_gamma   81.903
_symmetry_Int_Tables_number   1
_cell_volume   249.476
_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  0.746  0.566  0.542  1.0
  V  V1  1  0.967  0.116  0.345  1.0
  V  V2  1  0.600  0.738  0.275  1.0
  V  V3  1  0.731  0.989  0.694  1.0
  V  V4  1  0.439  0.497  0.933  1.0
  As  As5  1  0.228  0.419  0.605  1.0
  As  As6  1  0.003  0.036  0.996  1.0
  O  O7  1  0.882  0.470  0.316  1.0
  O  O8  1  0.269  0.939  0.311  1.0
  O  O9  1  0.713  0.933  0.464  1.0
  O  O10  1  0.580  0.688  0.757  1.0
  O  O11  1  0.545  0.589  0.084  1.0
  O  O12  1  0.394  0.254  0.735  1.0
  O  O13  1  0.783  0.166  0.884  1.0
  O  O14  1  0.114  0.725  0.943  1.0
  O  O15  1  0.820  0.001  0.176  1.0
  O  O16  1  0.992  0.235  0.570  1.0
  O  O17  1  0.052  0.712  0.639  1.0
  O  O18  1  0.453  0.462  0.454  1.0
  O  O19  1  0.222  0.219  0.028  1.0
[/CIF]
.