The material described by MgTi2Zn2(SiO5)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(4), one O(5), one O(8), and one O(9) atom to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one Ti(2)O6 octahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Ti(2)O6 octahedra,  an edgeedge with one Si(1)O4 tetrahedra, and  a faceface with one Ti(1)O6 octahedra. The corner-sharing octahedral tilt angles are 62°. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(10), one O(2), one O(4), one O(5), one O(7), and one O(9) atom to form distorted TiO6 octahedra that share corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  a faceface with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 33-50°. In the second Ti site, Ti(2) is bonded to one O(1), one O(10), one O(3), one O(6), one O(8), and one O(9) atom to form TiO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 33-50°. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a distorted see-saw-like geometry to one O(10), one O(2), one O(4), and one O(7) atom. In the second Zn site, Zn(2) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(3), one O(6), and one O(9) atom. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(7), and one O(8) atom to form SiO4 tetrahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 32-53°. In the second Si site, Si(2) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form SiO4 tetrahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, and corners with two equivalent Mg(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 35-46°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted see-saw-like geometry to one Mg(1), one Ti(2), one Zn(2), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ti(1), one Zn(1), and one Si(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ti(2), one Zn(2), and one Si(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Mg(1), one Ti(1), one Zn(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Mg(1), one Ti(1), and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Ti(2), one Zn(2), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Ti(1), one Zn(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a T-shaped geometry to one Mg(1), one Ti(2), and one Si(1) atom. In the ninth O site, O(9) is bonded in a trigonal pyramidal geometry to one Mg(1), one Ti(1), one Ti(2), and one Zn(2) atom. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Ti(1), one Ti(2), and one Zn(1) atom. is represented by the CIF file [CIF]
data_MgTi2Zn2(SiO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.555
_cell_length_b   7.386
_cell_length_c   8.243
_cell_angle_alpha   91.018
_cell_angle_beta   42.298
_cell_angle_gamma   107.329
_symmetry_Int_Tables_number   1
_cell_volume   206.189
_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
  Mg  Mg0  1  0.017  0.833  0.144  1.0
  Ti  Ti1  1  0.447  0.469  0.534  1.0
  Ti  Ti2  1  0.455  0.995  0.525  1.0
  Zn  Zn3  1  0.757  0.353  0.084  1.0
  Zn  Zn4  1  0.828  0.872  0.605  1.0
  Si  Si5  1  0.438  0.232  0.895  1.0
  Si  Si6  1  0.476  0.729  0.146  1.0
  O  O7  1  0.478  0.041  0.773  1.0
  O  O8  1  0.317  0.365  0.828  1.0
  O  O9  1  0.382  0.885  0.316  1.0
  O  O10  1  0.636  0.603  0.189  1.0
  O  O11  1  0.092  0.612  0.223  1.0
  O  O12  1  0.845  0.856  0.838  1.0
  O  O13  1  0.832  0.361  0.810  1.0
  O  O14  1  0.071  0.106  0.200  1.0
  O  O15  1  0.535  0.748  0.549  1.0
  O  O16  1  0.470  0.237  0.421  1.0
[/CIF]
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The material described by MgTi2Zn2(SiO5)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(4), one O(5), one O(8), and one O(9) atom to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one Ti(2)O6 octahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Ti(2)O6 octahedra,  an edgeedge with one Si(1)O4 tetrahedra, and  a faceface with one Ti(1)O6 octahedra. The corner-sharing octahedral tilt angles are 62°. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(10), one O(2), one O(4), one O(5), one O(7), and one O(9) atom to form distorted TiO6 octahedra that share corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  a faceface with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 33-50°. In the second Ti site, Ti(2) is bonded to one O(1), one O(10), one O(3), one O(6), one O(8), and one O(9) atom to form TiO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 33-50°. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a distorted see-saw-like geometry to one O(10), one O(2), one O(4), and one O(7) atom. In the second Zn site, Zn(2) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(3), one O(6), and one O(9) atom. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(7), and one O(8) atom to form SiO4 tetrahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 32-53°. In the second Si site, Si(2) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form SiO4 tetrahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, and corners with two equivalent Mg(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 35-46°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted see-saw-like geometry to one Mg(1), one Ti(2), one Zn(2), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ti(1), one Zn(1), and one Si(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Ti(2), one Zn(2), and one Si(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Mg(1), one Ti(1), one Zn(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Mg(1), one Ti(1), and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Ti(2), one Zn(2), and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to one Ti(1), one Zn(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a T-shaped geometry to one Mg(1), one Ti(2), and one Si(1) atom. In the ninth O site, O(9) is bonded in a trigonal pyramidal geometry to one Mg(1), one Ti(1), one Ti(2), and one Zn(2) atom. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Ti(1), one Ti(2), and one Zn(1) atom. is represented by the CIF file [CIF]
data_MgTi2Zn2(SiO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.555
_cell_length_b   7.386
_cell_length_c   8.243
_cell_angle_alpha   91.018
_cell_angle_beta   42.298
_cell_angle_gamma   107.329
_symmetry_Int_Tables_number   1
_cell_volume   206.189
_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
  Mg  Mg0  1  0.017  0.833  0.144  1.0
  Ti  Ti1  1  0.447  0.469  0.534  1.0
  Ti  Ti2  1  0.455  0.995  0.525  1.0
  Zn  Zn3  1  0.757  0.353  0.084  1.0
  Zn  Zn4  1  0.828  0.872  0.605  1.0
  Si  Si5  1  0.438  0.232  0.895  1.0
  Si  Si6  1  0.476  0.729  0.146  1.0
  O  O7  1  0.478  0.041  0.773  1.0
  O  O8  1  0.317  0.365  0.828  1.0
  O  O9  1  0.382  0.885  0.316  1.0
  O  O10  1  0.636  0.603  0.189  1.0
  O  O11  1  0.092  0.612  0.223  1.0
  O  O12  1  0.845  0.856  0.838  1.0
  O  O13  1  0.832  0.361  0.810  1.0
  O  O14  1  0.071  0.106  0.200  1.0
  O  O15  1  0.535  0.748  0.549  1.0
  O  O16  1  0.470  0.237  0.421  1.0
[/CIF]
.