The compound described by MgMo2(PO5)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(10), one O(2), one O(3), one O(5), and one O(6) atom to form distorted MgO5 trigonal bipyramids that share corners with two equivalent Mo(1)O6 octahedra,  an edgeedge with one Mo(1)O6 octahedra,  an edgeedge with one Mo(2)O6 octahedra,  an edgeedge with one P(1)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 41-56°. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(1), one O(10), one O(2), one O(3), one O(6), and one O(7) atom to form MoO6 octahedra that share corners with two equivalent Mo(2)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent Mg(1)O5 trigonal bipyramids, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 28-33°. In the second Mo site, Mo(2) is bonded to one O(1), one O(2), one O(4), one O(5), one O(8), and one O(9) atom to form MoO6 octahedra that share corners with two equivalent Mo(1)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 28-33°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(3), one O(5), one O(7), and one O(9) atom to form PO4 tetrahedra that share corners with two equivalent Mo(1)O6 octahedra, corners with two equivalent Mo(2)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 36-43°. In the second P site, P(2) is bonded to one O(10), one O(4), one O(6), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Mo(1)O6 octahedra, corners with two equivalent Mo(2)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 37-48°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Mo(1) and one Mo(2) atom. In the second O site, O(2) is bonded in a T-shaped geometry to one Mg(1), one Mo(1), and one Mo(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Mo(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Mo(2) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Mg(1), one Mo(2), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Mg(1), one Mo(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Mo(1) and one P(1) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Mo(2) and one P(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Mo(2) and one P(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Mg(1), one Mo(1), and one P(2) atom. is represented by the CIF card [CIF]
data_MgMo2(PO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.309
_cell_length_b   5.518
_cell_length_c   7.669
_cell_angle_alpha   69.826
_cell_angle_beta   67.812
_cell_angle_gamma   88.641
_symmetry_Int_Tables_number   1
_cell_volume   193.804
_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  0.837  0.287  0.093  1.0
  Mo  Mo1  1  0.234  0.736  0.022  1.0
  Mo  Mo2  1  0.718  0.228  0.532  1.0
  P  P3  1  0.563  0.826  0.299  1.0
  P  P4  1  0.878  0.626  0.746  1.0
  O  O5  1  0.420  0.046  0.790  1.0
  O  O6  1  0.008  0.398  0.247  1.0
  O  O7  1  0.853  0.908  0.114  1.0
  O  O8  1  0.917  0.902  0.597  1.0
  O  O9  1  0.547  0.059  0.372  1.0
  O  O10  1  0.097  0.582  0.845  1.0
  O  O11  1  0.339  0.843  0.215  1.0
  O  O12  1  0.905  0.414  0.657  1.0
  O  O13  1  0.532  0.562  0.460  1.0
  O  O14  1  0.604  0.550  0.944  1.0
[/CIF]
.
The compound described by MgMo2(PO5)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(10), one O(2), one O(3), one O(5), and one O(6) atom to form distorted MgO5 trigonal bipyramids that share corners with two equivalent Mo(1)O6 octahedra,  an edgeedge with one Mo(1)O6 octahedra,  an edgeedge with one Mo(2)O6 octahedra,  an edgeedge with one P(1)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 41-56°. There are two inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to one O(1), one O(10), one O(2), one O(3), one O(6), and one O(7) atom to form MoO6 octahedra that share corners with two equivalent Mo(2)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent Mg(1)O5 trigonal bipyramids, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 28-33°. In the second Mo site, Mo(2) is bonded to one O(1), one O(2), one O(4), one O(5), one O(8), and one O(9) atom to form MoO6 octahedra that share corners with two equivalent Mo(1)O6 octahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 28-33°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(3), one O(5), one O(7), and one O(9) atom to form PO4 tetrahedra that share corners with two equivalent Mo(1)O6 octahedra, corners with two equivalent Mo(2)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 36-43°. In the second P site, P(2) is bonded to one O(10), one O(4), one O(6), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Mo(1)O6 octahedra, corners with two equivalent Mo(2)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 37-48°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Mo(1) and one Mo(2) atom. In the second O site, O(2) is bonded in a T-shaped geometry to one Mg(1), one Mo(1), and one Mo(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Mo(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Mo(2) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one Mg(1), one Mo(2), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Mg(1), one Mo(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Mo(1) and one P(1) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Mo(2) and one P(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Mo(2) and one P(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Mg(1), one Mo(1), and one P(2) atom. is represented by the CIF card [CIF]
data_MgMo2(PO5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.309
_cell_length_b   5.518
_cell_length_c   7.669
_cell_angle_alpha   69.826
_cell_angle_beta   67.812
_cell_angle_gamma   88.641
_symmetry_Int_Tables_number   1
_cell_volume   193.804
_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  0.837  0.287  0.093  1.0
  Mo  Mo1  1  0.234  0.736  0.022  1.0
  Mo  Mo2  1  0.718  0.228  0.532  1.0
  P  P3  1  0.563  0.826  0.299  1.0
  P  P4  1  0.878  0.626  0.746  1.0
  O  O5  1  0.420  0.046  0.790  1.0
  O  O6  1  0.008  0.398  0.247  1.0
  O  O7  1  0.853  0.908  0.114  1.0
  O  O8  1  0.917  0.902  0.597  1.0
  O  O9  1  0.547  0.059  0.372  1.0
  O  O10  1  0.097  0.582  0.845  1.0
  O  O11  1  0.339  0.843  0.215  1.0
  O  O12  1  0.905  0.414  0.657  1.0
  O  O13  1  0.532  0.562  0.460  1.0
  O  O14  1  0.604  0.550  0.944  1.0
[/CIF]
.