The compound described by K2MgTi2O5 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one O(1), one O(3), and two equivalent O(4) atoms. In the second K site, K(2) is bonded in a 4-coordinate geometry to one O(2), one O(4), and two equivalent O(3) atoms. Mg(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), and two equivalent O(5) atoms. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(1), one O(3), one O(5), and two equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing TiO5 trigonal bipyramids. In the second Ti site, Ti(2) is bonded to one O(2), one O(4), one O(5), and two equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing TiO5 trigonal bipyramids. There are five inequivalent O sites. In the first O site, O(1) is bonded to one K(1), one Mg(1), one Ti(1), and two equivalent Ti(2) atoms to form distorted OKMgTi3 trigonal bipyramids that share corners with two equivalent O(1)KMgTi3 trigonal bipyramids and  an edgeedge with one O(3)K3Ti trigonal pyramid. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one K(2), one Mg(1), one Ti(2), and two equivalent Ti(1) atoms. In the third O site, O(3) is bonded to one K(1), two equivalent K(2), and one Ti(1) atom to form distorted OK3Ti trigonal pyramids that share corners with two equivalent O(3)K3Ti trigonal pyramids and  an edgeedge with one O(1)KMgTi3 trigonal bipyramid. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one K(2), two equivalent K(1), and one Ti(2) atom. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to two equivalent Mg(1), one Ti(1), and one Ti(2) atom. is represented by the CIF file [CIF]
data_K2MgTi2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.889
_cell_length_b   6.463
_cell_length_c   7.099
_cell_angle_alpha   93.606
_cell_angle_beta   89.681
_cell_angle_gamma   107.313
_symmetry_Int_Tables_number   1
_cell_volume   170.018
_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
  K  K0  1  0.639  0.275  0.438  1.0
  K  K1  1  0.365  0.737  0.577  1.0
  Mg  Mg2  1  0.499  1.000  0.007  1.0
  Ti  Ti3  1  0.828  0.656  0.083  1.0
  Ti  Ti4  1  0.171  0.345  0.930  1.0
  O  O5  1  0.659  0.322  0.036  1.0
  O  O6  1  0.339  0.676  0.999  1.0
  O  O7  1  0.839  0.679  0.334  1.0
  O  O8  1  0.163  0.327  0.681  1.0
  O  O9  1  0.997  0.995  0.995  1.0
[/CIF]
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The compound described by K2MgTi2O5 crystallizes in the triclinic P1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one O(1), one O(3), and two equivalent O(4) atoms. In the second K site, K(2) is bonded in a 4-coordinate geometry to one O(2), one O(4), and two equivalent O(3) atoms. Mg(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), and two equivalent O(5) atoms. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(1), one O(3), one O(5), and two equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing TiO5 trigonal bipyramids. In the second Ti site, Ti(2) is bonded to one O(2), one O(4), one O(5), and two equivalent O(1) atoms to form a mixture of distorted corner and edge-sharing TiO5 trigonal bipyramids. There are five inequivalent O sites. In the first O site, O(1) is bonded to one K(1), one Mg(1), one Ti(1), and two equivalent Ti(2) atoms to form distorted OKMgTi3 trigonal bipyramids that share corners with two equivalent O(1)KMgTi3 trigonal bipyramids and  an edgeedge with one O(3)K3Ti trigonal pyramid. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one K(2), one Mg(1), one Ti(2), and two equivalent Ti(1) atoms. In the third O site, O(3) is bonded to one K(1), two equivalent K(2), and one Ti(1) atom to form distorted OK3Ti trigonal pyramids that share corners with two equivalent O(3)K3Ti trigonal pyramids and  an edgeedge with one O(1)KMgTi3 trigonal bipyramid. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one K(2), two equivalent K(1), and one Ti(2) atom. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to two equivalent Mg(1), one Ti(1), and one Ti(2) atom. is represented by the CIF file [CIF]
data_K2MgTi2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.889
_cell_length_b   6.463
_cell_length_c   7.099
_cell_angle_alpha   93.606
_cell_angle_beta   89.681
_cell_angle_gamma   107.313
_symmetry_Int_Tables_number   1
_cell_volume   170.018
_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
  K  K0  1  0.639  0.275  0.438  1.0
  K  K1  1  0.365  0.737  0.577  1.0
  Mg  Mg2  1  0.499  1.000  0.007  1.0
  Ti  Ti3  1  0.828  0.656  0.083  1.0
  Ti  Ti4  1  0.171  0.345  0.930  1.0
  O  O5  1  0.659  0.322  0.036  1.0
  O  O6  1  0.339  0.676  0.999  1.0
  O  O7  1  0.839  0.679  0.334  1.0
  O  O8  1  0.163  0.327  0.681  1.0
  O  O9  1  0.997  0.995  0.995  1.0
[/CIF]
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