The compound described by Rb2MgV2(CuS2)4 is alpha Pu-derived structured and crystallizes in the triclinic P1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one S(2), one S(7), one S(8), two equivalent S(1), and two equivalent S(5) atoms. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to one Cu(3), one S(4), one S(6), two equivalent S(5), and two equivalent S(7) atoms. Mg(1) is bonded in a 6-coordinate geometry to one Cu(3), one Cu(4), one S(2), one S(3), one S(5), and one S(6) atom. There are two inequivalent V sites. In the first V site, V(1) is bonded to two equivalent Cu(3), one S(2), one S(4), one S(5), and one S(6) atom to form distorted VCu2S4 tetrahedra that share corners with two equivalent V(1)Cu2S4 tetrahedra and  an edgeedge with one Cu(1)S4 tetrahedra. In the second V site, V(2) is bonded to one S(1), one S(3), one S(7), and one S(8) atom to form VS4 tetrahedra that share  an edgeedge with one Cu(1)S4 tetrahedra and edges with two equivalent Cu(2)S4 tetrahedra. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one S(2), one S(3), one S(4), and one S(8) atom to form distorted CuS4 tetrahedra that share corners with two equivalent Cu(2)S4 tetrahedra,  an edgeedge with one V(1)Cu2S4 tetrahedra, and  an edgeedge with one V(2)S4 tetrahedra. In the second Cu site, Cu(2) is bonded to one S(1), one S(3), one S(7), and one S(8) atom to form distorted CuS4 tetrahedra that share corners with two equivalent Cu(1)S4 tetrahedra and edges with two equivalent V(2)S4 tetrahedra. In the third Cu site, Cu(3) is bonded in a 7-coordinate geometry to one Rb(2), one Mg(1), two equivalent V(1), one S(2), one S(4), and one S(5) atom. In the fourth Cu site, Cu(4) is bonded in a 4-coordinate geometry to one Mg(1), one S(1), one S(2), one S(3), and one S(6) atom. There are eight inequivalent S sites. In the first S site, S(1) is bonded in a 3-coordinate geometry to two equivalent Rb(1), one V(2), one Cu(2), and one Cu(4) atom. In the second S site, S(2) is bonded in a 6-coordinate geometry to one Rb(1), one Mg(1), one V(1), one Cu(1), one Cu(3), and one Cu(4) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to one Mg(1), one V(2), one Cu(1), one Cu(2), and one Cu(4) atom. In the fourth S site, S(4) is bonded in a 4-coordinate geometry to one Rb(2), one V(1), one Cu(1), and one Cu(3) atom. In the fifth S site, S(5) is bonded in a 7-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), one Mg(1), one V(1), and one Cu(3) atom. In the sixth S site, S(6) is bonded in a 3-coordinate geometry to one Rb(2), one Mg(1), one V(1), and one Cu(4) atom. In the seventh S site, S(7) is bonded in a 5-coordinate geometry to one Rb(1), two equivalent Rb(2), one V(2), and one Cu(2) atom. In the eighth S site, S(8) is bonded in a 3-coordinate geometry to one Rb(1), one V(2), one Cu(1), and one Cu(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2MgV2(CuS2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.561
_cell_length_b   7.777
_cell_length_c   9.873
_cell_angle_alpha   91.995
_cell_angle_beta   108.088
_cell_angle_gamma   89.417
_symmetry_Int_Tables_number   1
_cell_volume   405.586
_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  0.550  0.781  0.374  1.0
  Rb  Rb1  1  0.185  0.303  0.585  1.0
  Mg  Mg2  1  0.127  0.983  0.856  1.0
  V  V3  1  0.532  0.753  0.798  1.0
  V  V4  1  0.709  0.255  0.206  1.0
  Cu  Cu5  1  0.621  0.481  0.990  1.0
  Cu  Cu6  1  0.205  0.259  0.200  1.0
  Cu  Cu7  1  0.045  0.648  0.793  1.0
  Cu  Cu8  1  0.639  0.007  0.002  1.0
  S  S9  1  0.953  0.026  0.211  1.0
  S  S10  1  0.392  0.745  0.997  1.0
  S  S11  1  0.365  0.248  0.006  1.0
  S  S12  1  0.714  0.492  0.780  1.0
  S  S13  1  0.152  0.802  0.629  1.0
  S  S14  1  0.682  0.024  0.778  1.0
  S  S15  1  0.572  0.262  0.389  1.0
  S  S16  1  0.936  0.485  0.205  1.0
[/CIF]
.
The compound described by Rb2MgV2(CuS2)4 is alpha Pu-derived structured and crystallizes in the triclinic P1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one S(2), one S(7), one S(8), two equivalent S(1), and two equivalent S(5) atoms. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to one Cu(3), one S(4), one S(6), two equivalent S(5), and two equivalent S(7) atoms. Mg(1) is bonded in a 6-coordinate geometry to one Cu(3), one Cu(4), one S(2), one S(3), one S(5), and one S(6) atom. There are two inequivalent V sites. In the first V site, V(1) is bonded to two equivalent Cu(3), one S(2), one S(4), one S(5), and one S(6) atom to form distorted VCu2S4 tetrahedra that share corners with two equivalent V(1)Cu2S4 tetrahedra and  an edgeedge with one Cu(1)S4 tetrahedra. In the second V site, V(2) is bonded to one S(1), one S(3), one S(7), and one S(8) atom to form VS4 tetrahedra that share  an edgeedge with one Cu(1)S4 tetrahedra and edges with two equivalent Cu(2)S4 tetrahedra. There are four inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one S(2), one S(3), one S(4), and one S(8) atom to form distorted CuS4 tetrahedra that share corners with two equivalent Cu(2)S4 tetrahedra,  an edgeedge with one V(1)Cu2S4 tetrahedra, and  an edgeedge with one V(2)S4 tetrahedra. In the second Cu site, Cu(2) is bonded to one S(1), one S(3), one S(7), and one S(8) atom to form distorted CuS4 tetrahedra that share corners with two equivalent Cu(1)S4 tetrahedra and edges with two equivalent V(2)S4 tetrahedra. In the third Cu site, Cu(3) is bonded in a 7-coordinate geometry to one Rb(2), one Mg(1), two equivalent V(1), one S(2), one S(4), and one S(5) atom. In the fourth Cu site, Cu(4) is bonded in a 4-coordinate geometry to one Mg(1), one S(1), one S(2), one S(3), and one S(6) atom. There are eight inequivalent S sites. In the first S site, S(1) is bonded in a 3-coordinate geometry to two equivalent Rb(1), one V(2), one Cu(2), and one Cu(4) atom. In the second S site, S(2) is bonded in a 6-coordinate geometry to one Rb(1), one Mg(1), one V(1), one Cu(1), one Cu(3), and one Cu(4) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to one Mg(1), one V(2), one Cu(1), one Cu(2), and one Cu(4) atom. In the fourth S site, S(4) is bonded in a 4-coordinate geometry to one Rb(2), one V(1), one Cu(1), and one Cu(3) atom. In the fifth S site, S(5) is bonded in a 7-coordinate geometry to two equivalent Rb(1), two equivalent Rb(2), one Mg(1), one V(1), and one Cu(3) atom. In the sixth S site, S(6) is bonded in a 3-coordinate geometry to one Rb(2), one Mg(1), one V(1), and one Cu(4) atom. In the seventh S site, S(7) is bonded in a 5-coordinate geometry to one Rb(1), two equivalent Rb(2), one V(2), and one Cu(2) atom. In the eighth S site, S(8) is bonded in a 3-coordinate geometry to one Rb(1), one V(2), one Cu(1), and one Cu(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2MgV2(CuS2)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.561
_cell_length_b   7.777
_cell_length_c   9.873
_cell_angle_alpha   91.995
_cell_angle_beta   108.088
_cell_angle_gamma   89.417
_symmetry_Int_Tables_number   1
_cell_volume   405.586
_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  0.550  0.781  0.374  1.0
  Rb  Rb1  1  0.185  0.303  0.585  1.0
  Mg  Mg2  1  0.127  0.983  0.856  1.0
  V  V3  1  0.532  0.753  0.798  1.0
  V  V4  1  0.709  0.255  0.206  1.0
  Cu  Cu5  1  0.621  0.481  0.990  1.0
  Cu  Cu6  1  0.205  0.259  0.200  1.0
  Cu  Cu7  1  0.045  0.648  0.793  1.0
  Cu  Cu8  1  0.639  0.007  0.002  1.0
  S  S9  1  0.953  0.026  0.211  1.0
  S  S10  1  0.392  0.745  0.997  1.0
  S  S11  1  0.365  0.248  0.006  1.0
  S  S12  1  0.714  0.492  0.780  1.0
  S  S13  1  0.152  0.802  0.629  1.0
  S  S14  1  0.682  0.024  0.778  1.0
  S  S15  1  0.572  0.262  0.389  1.0
  S  S16  1  0.936  0.485  0.205  1.0
[/CIF]
.