The crystal structure described by Cs2MgTm2(WO4)4 is Pb (Zr_0.50 Ti_0.48) O_3-derived structured and crystallizes in the monoclinic C2 space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 13-coordinate geometry to one Mg(1), two equivalent O(1), two equivalent O(2), two equivalent O(3), two equivalent O(6), two equivalent O(7), and two equivalent O(8) atoms. In the second Cs site, Cs(2) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(4), two equivalent O(5), and two equivalent O(7) atoms. Mg(1) is bonded in a 6-coordinate geometry to one Cs(1), two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded in a 6-coordinate geometry to two equivalent O(4), two equivalent O(5), and two equivalent O(7) atoms. In the second Tm site, Tm(2) is bonded to two equivalent O(3), two equivalent O(6), and two equivalent O(8) atoms to form distorted TmO6 pentagonal pyramids that share corners with four equivalent W(1)O6 octahedra and corners with four equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 20-64°. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom to form distorted WO6 octahedra that share corners with two equivalent W(2)O6 octahedra, corners with two equivalent Tm(2)O6 pentagonal pyramids, and  an edgeedge with one W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-40°. In the second W site, W(2) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(8) atom to form distorted WO6 octahedra that share corners with two equivalent W(1)O6 octahedra, corners with two equivalent Tm(2)O6 pentagonal pyramids, and  an edgeedge with one W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-40°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to one Cs(1), one Cs(2), one Mg(1), one W(1), and one W(2) atom. In the second O site, O(2) is bonded to one Cs(1), one Cs(2), one W(1), and one W(2) atom to form distorted corner-sharing OCs2W2 trigonal pyramids. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Cs(1), one Tm(2), and one W(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Cs(2), one Tm(1), and one W(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Cs(2), one Mg(1), one Tm(1), one W(1), and one W(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Cs(1), one Mg(1), one Tm(2), one W(1), and one W(2) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one Cs(1), one Cs(2), one Tm(1), and one W(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Cs(1), one Tm(2), and one W(2) atom. is represented by the CIF card [CIF]
data_Cs2Tm2Mg(WO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.877
_cell_length_b   7.877
_cell_length_c   7.711
_cell_angle_alpha   61.510
_cell_angle_beta   61.510
_cell_angle_gamma   86.645
_symmetry_Int_Tables_number   1
_cell_volume   360.634
_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
  Cs  Cs0  1  0.818  0.182  0.750  1.0
  Cs  Cs1  1  0.204  0.796  0.250  1.0
  Tm  Tm2  1  0.220  0.780  0.750  1.0
  Tm  Tm3  1  0.772  0.228  0.250  1.0
  Mg  Mg4  1  0.540  0.460  0.750  1.0
  W  W5  1  0.279  0.301  0.708  1.0
  W  W6  1  0.704  0.705  0.282  1.0
  W  W7  1  0.699  0.721  0.792  1.0
  W  W8  1  0.295  0.296  0.218  1.0
  O  O9  1  0.346  0.226  0.967  1.0
  O  O10  1  0.625  0.750  0.070  1.0
  O  O11  1  0.774  0.654  0.533  1.0
  O  O12  1  0.250  0.375  0.430  1.0
  O  O13  1  0.657  0.961  0.613  1.0
  O  O14  1  0.324  0.050  0.391  1.0
  O  O15  1  0.039  0.343  0.887  1.0
  O  O16  1  0.950  0.676  0.109  1.0
  O  O17  1  0.408  0.619  0.558  1.0
  O  O18  1  0.605  0.388  0.466  1.0
  O  O19  1  0.381  0.592  0.942  1.0
  O  O20  1  0.612  0.395  0.034  1.0
  O  O21  1  0.254  0.039  0.776  1.0
  O  O22  1  0.738  0.964  0.213  1.0
  O  O23  1  0.961  0.746  0.724  1.0
  O  O24  1  0.036  0.262  0.287  1.0
[/CIF]
.
The crystal structure described by Cs2MgTm2(WO4)4 is Pb (Zr_0.50 Ti_0.48) O_3-derived structured and crystallizes in the monoclinic C2 space group. There are two inequivalent Cs sites. In the first Cs site, Cs(1) is bonded in a 13-coordinate geometry to one Mg(1), two equivalent O(1), two equivalent O(2), two equivalent O(3), two equivalent O(6), two equivalent O(7), and two equivalent O(8) atoms. In the second Cs site, Cs(2) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(4), two equivalent O(5), and two equivalent O(7) atoms. Mg(1) is bonded in a 6-coordinate geometry to one Cs(1), two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded in a 6-coordinate geometry to two equivalent O(4), two equivalent O(5), and two equivalent O(7) atoms. In the second Tm site, Tm(2) is bonded to two equivalent O(3), two equivalent O(6), and two equivalent O(8) atoms to form distorted TmO6 pentagonal pyramids that share corners with four equivalent W(1)O6 octahedra and corners with four equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 20-64°. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(7) atom to form distorted WO6 octahedra that share corners with two equivalent W(2)O6 octahedra, corners with two equivalent Tm(2)O6 pentagonal pyramids, and  an edgeedge with one W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-40°. In the second W site, W(2) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(8) atom to form distorted WO6 octahedra that share corners with two equivalent W(1)O6 octahedra, corners with two equivalent Tm(2)O6 pentagonal pyramids, and  an edgeedge with one W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 38-40°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 1-coordinate geometry to one Cs(1), one Cs(2), one Mg(1), one W(1), and one W(2) atom. In the second O site, O(2) is bonded to one Cs(1), one Cs(2), one W(1), and one W(2) atom to form distorted corner-sharing OCs2W2 trigonal pyramids. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Cs(1), one Tm(2), and one W(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Cs(2), one Tm(1), and one W(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Cs(2), one Mg(1), one Tm(1), one W(1), and one W(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Cs(1), one Mg(1), one Tm(2), one W(1), and one W(2) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one Cs(1), one Cs(2), one Tm(1), and one W(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Cs(1), one Tm(2), and one W(2) atom. is represented by the CIF card [CIF]
data_Cs2Tm2Mg(WO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.877
_cell_length_b   7.877
_cell_length_c   7.711
_cell_angle_alpha   61.510
_cell_angle_beta   61.510
_cell_angle_gamma   86.645
_symmetry_Int_Tables_number   1
_cell_volume   360.634
_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
  Cs  Cs0  1  0.818  0.182  0.750  1.0
  Cs  Cs1  1  0.204  0.796  0.250  1.0
  Tm  Tm2  1  0.220  0.780  0.750  1.0
  Tm  Tm3  1  0.772  0.228  0.250  1.0
  Mg  Mg4  1  0.540  0.460  0.750  1.0
  W  W5  1  0.279  0.301  0.708  1.0
  W  W6  1  0.704  0.705  0.282  1.0
  W  W7  1  0.699  0.721  0.792  1.0
  W  W8  1  0.295  0.296  0.218  1.0
  O  O9  1  0.346  0.226  0.967  1.0
  O  O10  1  0.625  0.750  0.070  1.0
  O  O11  1  0.774  0.654  0.533  1.0
  O  O12  1  0.250  0.375  0.430  1.0
  O  O13  1  0.657  0.961  0.613  1.0
  O  O14  1  0.324  0.050  0.391  1.0
  O  O15  1  0.039  0.343  0.887  1.0
  O  O16  1  0.950  0.676  0.109  1.0
  O  O17  1  0.408  0.619  0.558  1.0
  O  O18  1  0.605  0.388  0.466  1.0
  O  O19  1  0.381  0.592  0.942  1.0
  O  O20  1  0.612  0.395  0.034  1.0
  O  O21  1  0.254  0.039  0.776  1.0
  O  O22  1  0.738  0.964  0.213  1.0
  O  O23  1  0.961  0.746  0.724  1.0
  O  O24  1  0.036  0.262  0.287  1.0
[/CIF]
.