The material structure described by Rb4MgV4O10 crystallizes in the triclinic P1 space group. There are four inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(7), one O(9), and two equivalent O(5) atoms. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(8), one O(9), and two equivalent O(6) atoms. In the third Rb site, Rb(3) is bonded in a 10-coordinate geometry to one Mg(1), one O(1), one O(10), one O(3), one O(8), one O(9), two equivalent O(5), and two equivalent O(7) atoms. In the fourth Rb site, Rb(4) is bonded in a 10-coordinate geometry to one Mg(1), one O(10), one O(2), one O(4), one O(7), one O(9), two equivalent O(6), and two equivalent O(8) atoms. Mg(1) is bonded in a square co-planar geometry to one Rb(3), one Rb(4), one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form corner-sharing VO6 octahedra. In the second V site, V(2) is bonded in a square co-planar geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the third V site, V(3) is bonded to one O(10), one O(5), one O(8), and one O(9) atom to form VO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra and corners with two equivalent V(4)O4 tetrahedra. The corner-sharing octahedral tilt angles are 6°. In the fourth V site, V(4) is bonded to one O(10), one O(6), one O(7), and one O(9) atom to form VO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra and corners with two equivalent V(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 7°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Rb(1), one Rb(2), one Rb(3), one Mg(1), one V(1), and one V(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Rb(1), one Rb(2), one Rb(4), one Mg(1), one V(1), and one V(2) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Rb(1), one Rb(2), one Rb(3), one Mg(1), one V(1), and one V(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Rb(1), one Rb(2), one Rb(4), one Mg(1), one V(1), and one V(2) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to two equivalent Rb(1), two equivalent Rb(3), one V(1), and one V(3) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to two equivalent Rb(2), two equivalent Rb(4), one V(1), and one V(4) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(4), two equivalent Rb(3), and one V(4) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Rb(2), one Rb(3), two equivalent Rb(4), and one V(3) atom. In the ninth O site, O(9) is bonded in a distorted linear geometry to one Rb(1), one Rb(2), one Rb(3), one Rb(4), one V(3), and one V(4) atom. In the tenth O site, O(10) is bonded in a distorted linear geometry to one Rb(1), one Rb(2), one Rb(3), one Rb(4), one V(3), and one V(4) atom. is represented by the CIF file [CIF]
data_Rb4MgV4O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.804
_cell_length_b   6.101
_cell_length_c   9.683
_cell_angle_alpha   107.245
_cell_angle_beta   107.550
_cell_angle_gamma   89.233
_symmetry_Int_Tables_number   1
_cell_volume   311.118
_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
  Rb  Rb0  1  0.601  0.100  0.223  1.0
  Rb  Rb1  1  0.382  0.901  0.780  1.0
  Rb  Rb2  1  0.151  0.594  0.325  1.0
  Rb  Rb3  1  0.814  0.404  0.672  1.0
  Mg  Mg4  1  0.996  0.500  0.999  1.0
  V  V5  1  0.997  0.002  0.006  1.0
  V  V6  1  0.496  0.501  0.001  1.0
  V  V7  1  0.210  0.148  0.448  1.0
  V  V8  1  0.768  0.848  0.553  1.0
  O  O9  1  0.262  0.290  0.008  1.0
  O  O10  1  0.225  0.730  0.993  1.0
  O  O11  1  0.765  0.270  0.005  1.0
  O  O12  1  0.732  0.713  0.998  1.0
  O  O13  1  0.111  0.097  0.239  1.0
  O  O14  1  0.873  0.899  0.758  1.0
  O  O15  1  0.727  0.574  0.429  1.0
  O  O16  1  0.297  0.427  0.563  1.0
  O  O17  1  0.970  0.014  0.492  1.0
  O  O18  1  0.479  0.989  0.507  1.0
[/CIF]
.
The material structure described by Rb4MgV4O10 crystallizes in the triclinic P1 space group. There are four inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(7), one O(9), and two equivalent O(5) atoms. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(8), one O(9), and two equivalent O(6) atoms. In the third Rb site, Rb(3) is bonded in a 10-coordinate geometry to one Mg(1), one O(1), one O(10), one O(3), one O(8), one O(9), two equivalent O(5), and two equivalent O(7) atoms. In the fourth Rb site, Rb(4) is bonded in a 10-coordinate geometry to one Mg(1), one O(10), one O(2), one O(4), one O(7), one O(9), two equivalent O(6), and two equivalent O(8) atoms. Mg(1) is bonded in a square co-planar geometry to one Rb(3), one Rb(4), one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form corner-sharing VO6 octahedra. In the second V site, V(2) is bonded in a square co-planar geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the third V site, V(3) is bonded to one O(10), one O(5), one O(8), and one O(9) atom to form VO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra and corners with two equivalent V(4)O4 tetrahedra. The corner-sharing octahedral tilt angles are 6°. In the fourth V site, V(4) is bonded to one O(10), one O(6), one O(7), and one O(9) atom to form VO4 tetrahedra that share  a cornercorner with one V(1)O6 octahedra and corners with two equivalent V(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 7°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Rb(1), one Rb(2), one Rb(3), one Mg(1), one V(1), and one V(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Rb(1), one Rb(2), one Rb(4), one Mg(1), one V(1), and one V(2) atom. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Rb(1), one Rb(2), one Rb(3), one Mg(1), one V(1), and one V(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Rb(1), one Rb(2), one Rb(4), one Mg(1), one V(1), and one V(2) atom. In the fifth O site, O(5) is bonded in a distorted linear geometry to two equivalent Rb(1), two equivalent Rb(3), one V(1), and one V(3) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to two equivalent Rb(2), two equivalent Rb(4), one V(1), and one V(4) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(4), two equivalent Rb(3), and one V(4) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Rb(2), one Rb(3), two equivalent Rb(4), and one V(3) atom. In the ninth O site, O(9) is bonded in a distorted linear geometry to one Rb(1), one Rb(2), one Rb(3), one Rb(4), one V(3), and one V(4) atom. In the tenth O site, O(10) is bonded in a distorted linear geometry to one Rb(1), one Rb(2), one Rb(3), one Rb(4), one V(3), and one V(4) atom. is represented by the CIF file [CIF]
data_Rb4MgV4O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.804
_cell_length_b   6.101
_cell_length_c   9.683
_cell_angle_alpha   107.245
_cell_angle_beta   107.550
_cell_angle_gamma   89.233
_symmetry_Int_Tables_number   1
_cell_volume   311.118
_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
  Rb  Rb0  1  0.601  0.100  0.223  1.0
  Rb  Rb1  1  0.382  0.901  0.780  1.0
  Rb  Rb2  1  0.151  0.594  0.325  1.0
  Rb  Rb3  1  0.814  0.404  0.672  1.0
  Mg  Mg4  1  0.996  0.500  0.999  1.0
  V  V5  1  0.997  0.002  0.006  1.0
  V  V6  1  0.496  0.501  0.001  1.0
  V  V7  1  0.210  0.148  0.448  1.0
  V  V8  1  0.768  0.848  0.553  1.0
  O  O9  1  0.262  0.290  0.008  1.0
  O  O10  1  0.225  0.730  0.993  1.0
  O  O11  1  0.765  0.270  0.005  1.0
  O  O12  1  0.732  0.713  0.998  1.0
  O  O13  1  0.111  0.097  0.239  1.0
  O  O14  1  0.873  0.899  0.758  1.0
  O  O15  1  0.727  0.574  0.429  1.0
  O  O16  1  0.297  0.427  0.563  1.0
  O  O17  1  0.970  0.014  0.492  1.0
  O  O18  1  0.479  0.989  0.507  1.0
[/CIF]
.