The material structure described by MgSm2V2O8 crystallizes in the monoclinic C2 space group. Mg(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form distorted MgO4 tetrahedra that share corners with two equivalent V(2)O4 tetrahedra and  an edgeedge with one V(1)O4 trigonal pyramid. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Sm site, Sm(2) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent V sites. In the first V site, V(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted VO4 trigonal pyramids that share  an edgeedge with one Mg(1)O4 tetrahedra. In the second V site, V(2) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form VO4 tetrahedra that share corners with two equivalent Mg(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted see-saw-like geometry to one Mg(1), one Sm(1), one Sm(2), and one V(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sm(1), one Sm(2), and one V(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Mg(1), one Sm(1), one Sm(2), and one V(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sm(1), one Sm(2), and one V(2) atom. is represented by the CIF file [CIF]
data_Sm2MgV2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.190
_cell_length_b   6.190
_cell_length_c   6.325
_cell_angle_alpha   105.951
_cell_angle_beta   105.951
_cell_angle_gamma   116.059
_symmetry_Int_Tables_number   1
_cell_volume   186.084
_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
  Sm  Sm0  1  0.874  0.126  0.750  1.0
  Sm  Sm1  1  0.152  0.848  0.250  1.0
  Mg  Mg2  1  0.858  0.142  0.250  1.0
  V  V3  1  0.598  0.402  0.250  1.0
  V  V4  1  0.377  0.623  0.750  1.0
  O  O5  1  0.810  0.364  0.091  1.0
  O  O6  1  0.809  0.759  0.426  1.0
  O  O7  1  0.636  0.190  0.409  1.0
  O  O8  1  0.180  0.259  0.539  1.0
  O  O9  1  0.195  0.607  0.930  1.0
  O  O10  1  0.241  0.191  0.074  1.0
  O  O11  1  0.741  0.820  0.961  1.0
  O  O12  1  0.393  0.805  0.570  1.0
[/CIF]
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The material structure described by MgSm2V2O8 crystallizes in the monoclinic C2 space group. Mg(1) is bonded to two equivalent O(1) and two equivalent O(3) atoms to form distorted MgO4 tetrahedra that share corners with two equivalent V(2)O4 tetrahedra and  an edgeedge with one V(1)O4 trigonal pyramid. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Sm site, Sm(2) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent V sites. In the first V site, V(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form distorted VO4 trigonal pyramids that share  an edgeedge with one Mg(1)O4 tetrahedra. In the second V site, V(2) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form VO4 tetrahedra that share corners with two equivalent Mg(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted see-saw-like geometry to one Mg(1), one Sm(1), one Sm(2), and one V(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sm(1), one Sm(2), and one V(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Mg(1), one Sm(1), one Sm(2), and one V(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sm(1), one Sm(2), and one V(2) atom. is represented by the CIF file [CIF]
data_Sm2MgV2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.190
_cell_length_b   6.190
_cell_length_c   6.325
_cell_angle_alpha   105.951
_cell_angle_beta   105.951
_cell_angle_gamma   116.059
_symmetry_Int_Tables_number   1
_cell_volume   186.084
_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
  Sm  Sm0  1  0.874  0.126  0.750  1.0
  Sm  Sm1  1  0.152  0.848  0.250  1.0
  Mg  Mg2  1  0.858  0.142  0.250  1.0
  V  V3  1  0.598  0.402  0.250  1.0
  V  V4  1  0.377  0.623  0.750  1.0
  O  O5  1  0.810  0.364  0.091  1.0
  O  O6  1  0.809  0.759  0.426  1.0
  O  O7  1  0.636  0.190  0.409  1.0
  O  O8  1  0.180  0.259  0.539  1.0
  O  O9  1  0.195  0.607  0.930  1.0
  O  O10  1  0.241  0.191  0.074  1.0
  O  O11  1  0.741  0.820  0.961  1.0
  O  O12  1  0.393  0.805  0.570  1.0
[/CIF]
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