The structure described by MgVAs2O7 crystallizes in the monoclinic P2_1/c space group. Mg(1) is bonded in a 6-coordinate geometry to one O(1), one O(5), one O(6), one O(7), and two equivalent O(3) atoms. V(1) is bonded to one O(1), one O(2), one O(5), one O(6), and one O(7) atom to form distorted VO5 trigonal bipyramids that share corners with two equivalent As(1)O4 tetrahedra. There are two inequivalent As sites. In the first As site, As(1) is bonded to one O(2), one O(3), one O(4), and one O(6) atom to form AsO4 tetrahedra that share corners with two equivalent V(1)O5 trigonal bipyramids. In the second As site, As(2) is bonded in a 3-coordinate geometry to one O(4), one O(5), one O(6), and one O(7) atom. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a trigonal planar geometry to one Mg(1), one V(1), and one As(2) atom. In the second O site, O(6) is bonded in a 4-coordinate geometry to one Mg(1), one V(1), one As(1), and one As(2) atom. In the third O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one V(1), and one As(2) atom. In the fourth O site, O(1) is bonded in a bent 120 degrees geometry to one Mg(1) and one V(1) atom. In the fifth O site, O(2) is bonded in a linear geometry to one V(1) and one As(1) atom. In the sixth O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Mg(1) and one As(1) atom. In the seventh O site, O(4) is bonded in a bent 120 degrees geometry to one As(1) and one As(2) atom. is represented by the CIF file [CIF]
data_MgVAs2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.012
_cell_length_b   7.810
_cell_length_c   10.545
_cell_angle_alpha   58.144
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   560.441
_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
  Mg  Mg0  1  0.073  0.730  0.882  1.0
  Mg  Mg1  1  0.573  0.270  0.618  1.0
  Mg  Mg2  1  0.927  0.270  0.118  1.0
  Mg  Mg3  1  0.427  0.730  0.382  1.0
  V  V4  1  0.948  0.186  0.704  1.0
  V  V5  1  0.448  0.814  0.796  1.0
  V  V6  1  0.052  0.814  0.296  1.0
  V  V7  1  0.552  0.186  0.204  1.0
  As  As8  1  0.778  0.530  0.768  1.0
  As  As9  1  0.278  0.470  0.732  1.0
  As  As10  1  0.222  0.470  0.232  1.0
  As  As11  1  0.722  0.530  0.268  1.0
  As  As12  1  0.716  0.950  0.974  1.0
  As  As13  1  0.216  0.050  0.526  1.0
  As  As14  1  0.284  0.050  0.026  1.0
  As  As15  1  0.784  0.950  0.474  1.0
  O  O16  1  0.687  0.245  0.068  1.0
  O  O17  1  0.187  0.755  0.432  1.0
  O  O18  1  0.313  0.755  0.932  1.0
  O  O19  1  0.813  0.245  0.568  1.0
  O  O20  1  0.602  0.640  0.781  1.0
  O  O21  1  0.102  0.360  0.719  1.0
  O  O22  1  0.398  0.360  0.219  1.0
  O  O23  1  0.898  0.640  0.281  1.0
  O  O24  1  0.925  0.520  0.885  1.0
  O  O25  1  0.425  0.480  0.615  1.0
  O  O26  1  0.075  0.480  0.115  1.0
  O  O27  1  0.575  0.520  0.385  1.0
  O  O28  1  0.833  0.677  0.581  1.0
  O  O29  1  0.333  0.323  0.919  1.0
  O  O30  1  0.167  0.323  0.419  1.0
  O  O31  1  0.667  0.677  0.081  1.0
  O  O32  1  0.912  0.992  0.323  1.0
  O  O33  1  0.412  0.008  0.177  1.0
  O  O34  1  0.088  0.008  0.677  1.0
  O  O35  1  0.588  0.992  0.823  1.0
  O  O36  1  0.746  0.308  0.279  1.0
  O  O37  1  0.246  0.692  0.221  1.0
  O  O38  1  0.254  0.692  0.721  1.0
  O  O39  1  0.754  0.308  0.779  1.0
  O  O40  1  0.591  0.938  0.389  1.0
  O  O41  1  0.091  0.062  0.111  1.0
  O  O42  1  0.409  0.062  0.611  1.0
  O  O43  1  0.909  0.938  0.889  1.0
[/CIF]
.
The structure described by MgVAs2O7 crystallizes in the monoclinic P2_1/c space group. Mg(1) is bonded in a 6-coordinate geometry to one O(1), one O(5), one O(6), one O(7), and two equivalent O(3) atoms. V(1) is bonded to one O(1), one O(2), one O(5), one O(6), and one O(7) atom to form distorted VO5 trigonal bipyramids that share corners with two equivalent As(1)O4 tetrahedra. There are two inequivalent As sites. In the first As site, As(1) is bonded to one O(2), one O(3), one O(4), and one O(6) atom to form AsO4 tetrahedra that share corners with two equivalent V(1)O5 trigonal bipyramids. In the second As site, As(2) is bonded in a 3-coordinate geometry to one O(4), one O(5), one O(6), and one O(7) atom. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a trigonal planar geometry to one Mg(1), one V(1), and one As(2) atom. In the second O site, O(6) is bonded in a 4-coordinate geometry to one Mg(1), one V(1), one As(1), and one As(2) atom. In the third O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one V(1), and one As(2) atom. In the fourth O site, O(1) is bonded in a bent 120 degrees geometry to one Mg(1) and one V(1) atom. In the fifth O site, O(2) is bonded in a linear geometry to one V(1) and one As(1) atom. In the sixth O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Mg(1) and one As(1) atom. In the seventh O site, O(4) is bonded in a bent 120 degrees geometry to one As(1) and one As(2) atom. is represented by the CIF file [CIF]
data_MgVAs2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.012
_cell_length_b   7.810
_cell_length_c   10.545
_cell_angle_alpha   58.144
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   560.441
_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
  Mg  Mg0  1  0.073  0.730  0.882  1.0
  Mg  Mg1  1  0.573  0.270  0.618  1.0
  Mg  Mg2  1  0.927  0.270  0.118  1.0
  Mg  Mg3  1  0.427  0.730  0.382  1.0
  V  V4  1  0.948  0.186  0.704  1.0
  V  V5  1  0.448  0.814  0.796  1.0
  V  V6  1  0.052  0.814  0.296  1.0
  V  V7  1  0.552  0.186  0.204  1.0
  As  As8  1  0.778  0.530  0.768  1.0
  As  As9  1  0.278  0.470  0.732  1.0
  As  As10  1  0.222  0.470  0.232  1.0
  As  As11  1  0.722  0.530  0.268  1.0
  As  As12  1  0.716  0.950  0.974  1.0
  As  As13  1  0.216  0.050  0.526  1.0
  As  As14  1  0.284  0.050  0.026  1.0
  As  As15  1  0.784  0.950  0.474  1.0
  O  O16  1  0.687  0.245  0.068  1.0
  O  O17  1  0.187  0.755  0.432  1.0
  O  O18  1  0.313  0.755  0.932  1.0
  O  O19  1  0.813  0.245  0.568  1.0
  O  O20  1  0.602  0.640  0.781  1.0
  O  O21  1  0.102  0.360  0.719  1.0
  O  O22  1  0.398  0.360  0.219  1.0
  O  O23  1  0.898  0.640  0.281  1.0
  O  O24  1  0.925  0.520  0.885  1.0
  O  O25  1  0.425  0.480  0.615  1.0
  O  O26  1  0.075  0.480  0.115  1.0
  O  O27  1  0.575  0.520  0.385  1.0
  O  O28  1  0.833  0.677  0.581  1.0
  O  O29  1  0.333  0.323  0.919  1.0
  O  O30  1  0.167  0.323  0.419  1.0
  O  O31  1  0.667  0.677  0.081  1.0
  O  O32  1  0.912  0.992  0.323  1.0
  O  O33  1  0.412  0.008  0.177  1.0
  O  O34  1  0.088  0.008  0.677  1.0
  O  O35  1  0.588  0.992  0.823  1.0
  O  O36  1  0.746  0.308  0.279  1.0
  O  O37  1  0.246  0.692  0.221  1.0
  O  O38  1  0.254  0.692  0.721  1.0
  O  O39  1  0.754  0.308  0.779  1.0
  O  O40  1  0.591  0.938  0.389  1.0
  O  O41  1  0.091  0.062  0.111  1.0
  O  O42  1  0.409  0.062  0.611  1.0
  O  O43  1  0.909  0.938  0.889  1.0
[/CIF]
.