The material described by Sr2Mg(WO4)2 crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(7) atom. Mg(1) is bonded to one O(1), one O(4), one O(5), and one O(8) atom to form MgO4 tetrahedra that share corners with two equivalent W(1)O6 octahedra and  an edgeedge with one W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-42°. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted WO6 octahedra that share corners with two equivalent Mg(1)O4 tetrahedra and edges with two equivalent W(2)O6 octahedra. In the second W site, W(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(7) atom to form WO6 octahedra that share edges with two equivalent W(1)O6 octahedra and  an edgeedge with one Mg(1)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Sr(2), one Mg(1), and one W(2) atom. In the second O site, O(2) is bonded to one Sr(1), one Sr(2), one W(1), and one W(2) atom to form a mixture of distorted edge and corner-sharing OSr2W2 trigonal pyramids. In the third O site, O(3) is bonded to one Sr(1), one Sr(2), one W(1), and one W(2) atom to form a mixture of distorted edge and corner-sharing OSr2W2 trigonal pyramids. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Sr(2), one Mg(1), and one W(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Mg(1), and one W(1) atom. In the sixth O site, O(6) is bonded to one Sr(1), one Sr(2), one W(1), and one W(2) atom to form a mixture of distorted edge and corner-sharing OSr2W2 trigonal pyramids. In the seventh O site, O(7) is bonded to one Sr(1), one Sr(2), one W(1), and one W(2) atom to form a mixture of distorted edge and corner-sharing OSr2W2 trigonal pyramids. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Mg(1), and one W(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2Mg(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.418
_cell_length_b   5.534
_cell_length_c   8.429
_cell_angle_alpha   112.227
_cell_angle_beta   111.720
_cell_angle_gamma   80.946
_symmetry_Int_Tables_number   1
_cell_volume   217.287
_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
  Sr  Sr0  1  0.666  0.916  0.332  1.0
  Sr  Sr1  1  0.357  0.106  0.715  1.0
  Mg  Mg2  1  0.020  0.771  0.040  1.0
  W  W3  1  0.184  0.434  0.368  1.0
  W  W4  1  0.820  0.570  0.641  1.0
  O  O5  1  0.115  0.496  0.838  1.0
  O  O6  1  0.476  0.681  0.448  1.0
  O  O7  1  0.972  0.267  0.448  1.0
  O  O8  1  0.722  0.841  0.839  1.0
  O  O9  1  0.227  0.095  0.194  1.0
  O  O10  1  0.032  0.748  0.568  1.0
  O  O11  1  0.535  0.319  0.568  1.0
  O  O12  1  0.970  0.600  0.195  1.0
[/CIF]
.
The material described by Sr2Mg(WO4)2 crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(7) atom. Mg(1) is bonded to one O(1), one O(4), one O(5), and one O(8) atom to form MgO4 tetrahedra that share corners with two equivalent W(1)O6 octahedra and  an edgeedge with one W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-42°. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(2), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form distorted WO6 octahedra that share corners with two equivalent Mg(1)O4 tetrahedra and edges with two equivalent W(2)O6 octahedra. In the second W site, W(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(7) atom to form WO6 octahedra that share edges with two equivalent W(1)O6 octahedra and  an edgeedge with one Mg(1)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Sr(2), one Mg(1), and one W(2) atom. In the second O site, O(2) is bonded to one Sr(1), one Sr(2), one W(1), and one W(2) atom to form a mixture of distorted edge and corner-sharing OSr2W2 trigonal pyramids. In the third O site, O(3) is bonded to one Sr(1), one Sr(2), one W(1), and one W(2) atom to form a mixture of distorted edge and corner-sharing OSr2W2 trigonal pyramids. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Sr(2), one Mg(1), and one W(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Mg(1), and one W(1) atom. In the sixth O site, O(6) is bonded to one Sr(1), one Sr(2), one W(1), and one W(2) atom to form a mixture of distorted edge and corner-sharing OSr2W2 trigonal pyramids. In the seventh O site, O(7) is bonded to one Sr(1), one Sr(2), one W(1), and one W(2) atom to form a mixture of distorted edge and corner-sharing OSr2W2 trigonal pyramids. In the eighth O site, O(8) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Mg(1), and one W(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr2Mg(WO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.418
_cell_length_b   5.534
_cell_length_c   8.429
_cell_angle_alpha   112.227
_cell_angle_beta   111.720
_cell_angle_gamma   80.946
_symmetry_Int_Tables_number   1
_cell_volume   217.287
_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
  Sr  Sr0  1  0.666  0.916  0.332  1.0
  Sr  Sr1  1  0.357  0.106  0.715  1.0
  Mg  Mg2  1  0.020  0.771  0.040  1.0
  W  W3  1  0.184  0.434  0.368  1.0
  W  W4  1  0.820  0.570  0.641  1.0
  O  O5  1  0.115  0.496  0.838  1.0
  O  O6  1  0.476  0.681  0.448  1.0
  O  O7  1  0.972  0.267  0.448  1.0
  O  O8  1  0.722  0.841  0.839  1.0
  O  O9  1  0.227  0.095  0.194  1.0
  O  O10  1  0.032  0.748  0.568  1.0
  O  O11  1  0.535  0.319  0.568  1.0
  O  O12  1  0.970  0.600  0.195  1.0
[/CIF]
.