The material structure described by MgCoP2O7 crystallizes in the triclinic P1 space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(15), one O(17), one O(20), one O(8), and one O(9) atom to form MgO5 trigonal bipyramids that share  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one Co(3)O5 square pyramid,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and  an edgeedge with one Mg(4)O5 trigonal bipyramid. In the second Mg site, Mg(2) is bonded to one O(10), one O(16), one O(18), one O(19), and one O(7) atom to form MgO5 trigonal bipyramids that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(4)O5 square pyramid,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and  an edgeedge with one Mg(3)O5 trigonal bipyramid. In the third Mg site, Mg(3) is bonded to one O(11), one O(13), one O(18), one O(19), and one O(6) atom to form MgO5 trigonal bipyramids that share  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one Co(3)O5 square pyramid,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and  an edgeedge with one Mg(2)O5 trigonal bipyramid. In the fourth Mg site, Mg(4) is bonded to one O(12), one O(14), one O(17), one O(20), and one O(5) atom to form MgO5 trigonal bipyramids that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(4)O5 square pyramid,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(16), one O(21), one O(24), one O(27), and one O(5) atom to form CoO5 square pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one Mg(2)O5 trigonal bipyramid,  a cornercorner with one Mg(4)O5 trigonal bipyramid, and  an edgeedge with one Co(2)O5 square pyramid. In the second Co site, Co(2) is bonded to one O(13), one O(21), one O(24), one O(26), and one O(8) atom to form CoO5 square pyramids that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Mg(3)O5 trigonal bipyramid, and  an edgeedge with one Co(1)O5 square pyramid. In the third Co site, Co(3) is bonded to one O(15), one O(22), one O(23), one O(28), and one O(6) atom to form CoO5 square pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Mg(3)O5 trigonal bipyramid, and  an edgeedge with one Co(4)O5 square pyramid. In the fourth Co site, Co(4) is bonded to one O(14), one O(22), one O(23), one O(25), and one O(7) atom to form CoO5 square pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra,  a cornercorner with one Mg(2)O5 trigonal bipyramid,  a cornercorner with one Mg(4)O5 trigonal bipyramid, and  an edgeedge with one Co(3)O5 square pyramid. There are eight inequivalent P sites. In the first P site, P(1) is bonded to one O(19), one O(23), one O(3), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(3)O5 square pyramid,  a cornercorner with one Co(4)O5 square pyramid,  a cornercorner with one P(7)O4 tetrahedra,  a cornercorner with one Mg(2)O5 trigonal bipyramid,  a cornercorner with one Mg(3)O5 trigonal bipyramid, and  a cornercorner with one Mg(4)O5 trigonal bipyramid. In the second P site, P(2) is bonded to one O(20), one O(24), one O(4), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one Co(3)O5 square pyramid,  a cornercorner with one P(8)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Mg(3)O5 trigonal bipyramid, and  a cornercorner with one Mg(4)O5 trigonal bipyramid. In the third P site, P(3) is bonded to one O(1), one O(17), one O(21), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one Co(4)O5 square pyramid,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Mg(2)O5 trigonal bipyramid, and  a cornercorner with one Mg(4)O5 trigonal bipyramid. In the fourth P site, P(4) is bonded to one O(18), one O(2), one O(22), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one Co(3)O5 square pyramid,  a cornercorner with one Co(4)O5 square pyramid,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Mg(2)O5 trigonal bipyramid, and  a cornercorner with one Mg(3)O5 trigonal bipyramid. In the fifth P site, P(5) is bonded to one O(1), one O(11), one O(15), and one O(27) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(3)O5 square pyramid,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid, and  a cornercorner with one Mg(3)O5 trigonal bipyramid. In the sixth P site, P(6) is bonded to one O(12), one O(16), one O(2), and one O(28) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(3)O5 square pyramid,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one Mg(2)O5 trigonal bipyramid, and  a cornercorner with one Mg(4)O5 trigonal bipyramid. In the seventh P site, P(7) is bonded to one O(13), one O(25), one O(3), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one Co(4)O5 square pyramid,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid, and  a cornercorner with one Mg(3)O5 trigonal bipyramid. In the eighth P site, P(8) is bonded to one O(10), one O(14), one O(26), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one Co(4)O5 square pyramid,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one Mg(2)O5 trigonal bipyramid, and  a cornercorner with one Mg(4)O5 trigonal bipyramid. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one P(3) and one P(5) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one P(4) and one P(6) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one P(1) and one P(7) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one P(2) and one P(8) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mg(4), one Co(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mg(3), one Co(3), and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Mg(2), one Co(4), and one P(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mg(1), one Co(2), and one P(4) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Mg(1) and one P(7) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Mg(2) and one P(8) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Mg(3) and one P(5) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Mg(4) and one P(6) atom. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one Mg(3), one Co(2), and one P(7) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Mg(4), one Co(4), and one P(8) atom. In the fifteenth O site, O(15) is bonded in a trigonal planar geometry to one Mg(1), one Co(3), and one P(5) atom. In the sixteenth O site, O(16) is bonded in a trigonal planar geometry to one Mg(2), one Co(1), and one P(6) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal planar geometry to one Mg(1), one Mg(4), and one P(3) atom. In the eighteenth O site, O(18) is bonded in a distorted trigonal planar geometry to one Mg(2), one Mg(3), and one P(4) atom. In the nineteenth O site, O(19) is bonded in a distorted trigonal planar geometry to one Mg(2), one Mg(3), and one P(1) atom. In the twentieth O site, O(20) is bonded in a distorted trigonal planar geometry to one Mg(1), one Mg(4), and one P(2) atom. In the twenty-first O site, O(21) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one P(3) atom. In the twenty-second O site, O(22) is bonded in a 3-coordinate geometry to one Co(3), one Co(4), and one P(4) atom. In the twenty-third O site, O(23) is bonded in a 3-coordinate geometry to one Co(3), one Co(4), and one P(1) atom. In the twenty-fourth O site, O(24) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one P(2) atom. In the twenty-fifth O site, O(25) is bonded in a bent 150 degrees geometry to one Co(4) and one P(7) atom. In the twenty-sixth O site, O(26) is bonded in a bent 150 degrees geometry to one Co(2) and one P(8) atom. In the twenty-seventh O site, O(27) is bonded in a bent 150 degrees geometry to one Co(1) and one P(5) atom. In the twenty-eighth O site, O(28) is bonded in a distorted bent 150 degrees geometry to one Co(3) and one P(6) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgCoP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.197
_cell_length_b   6.704
_cell_length_c   7.080
_cell_angle_alpha   77.922
_cell_angle_beta   65.642
_cell_angle_gamma   80.276
_symmetry_Int_Tables_number   1
_cell_volume   260.899
_cell_formula_units_Z   2
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
  Co  Co0  1  0.916  0.315  0.188  1.0
  Co  Co1  1  0.085  0.685  0.812  1.0
  Mg  Mg2  1  0.695  0.162  0.884  1.0
  Mg  Mg3  1  0.306  0.838  0.116  1.0
  O  O4  1  0.395  0.244  0.517  1.0
  O  O5  1  0.605  0.756  0.483  1.0
  O  O6  1  0.948  0.968  0.224  1.0
  O  O7  1  0.052  0.032  0.776  1.0
  O  O8  1  0.716  0.412  0.668  1.0
  O  O9  1  0.284  0.588  0.332  1.0
  O  O10  1  0.387  0.672  0.863  1.0
  O  O11  1  0.613  0.328  0.137  1.0
  O  O12  1  0.403  0.078  0.862  1.0
  O  O13  1  0.597  0.923  0.138  1.0
  O  O14  1  0.088  0.369  0.854  1.0
  O  O15  1  0.911  0.631  0.146  1.0
  O  O16  1  0.816  0.748  0.726  1.0
  O  O17  1  0.184  0.252  0.275  1.0
  P  P18  1  0.770  0.822  0.242  1.0
  P  P19  1  0.230  0.178  0.757  1.0
  P  P20  1  0.357  0.365  0.305  1.0
  P  P21  1  0.643  0.635  0.695  1.0
[/CIF]
.
The material structure described by MgCoP2O7 crystallizes in the triclinic P1 space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(15), one O(17), one O(20), one O(8), and one O(9) atom to form MgO5 trigonal bipyramids that share  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one Co(3)O5 square pyramid,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and  an edgeedge with one Mg(4)O5 trigonal bipyramid. In the second Mg site, Mg(2) is bonded to one O(10), one O(16), one O(18), one O(19), and one O(7) atom to form MgO5 trigonal bipyramids that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(4)O5 square pyramid,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and  an edgeedge with one Mg(3)O5 trigonal bipyramid. In the third Mg site, Mg(3) is bonded to one O(11), one O(13), one O(18), one O(19), and one O(6) atom to form MgO5 trigonal bipyramids that share  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one Co(3)O5 square pyramid,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra, and  an edgeedge with one Mg(2)O5 trigonal bipyramid. In the fourth Mg site, Mg(4) is bonded to one O(12), one O(14), one O(17), one O(20), and one O(5) atom to form MgO5 trigonal bipyramids that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(4)O5 square pyramid,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(16), one O(21), one O(24), one O(27), and one O(5) atom to form CoO5 square pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one Mg(2)O5 trigonal bipyramid,  a cornercorner with one Mg(4)O5 trigonal bipyramid, and  an edgeedge with one Co(2)O5 square pyramid. In the second Co site, Co(2) is bonded to one O(13), one O(21), one O(24), one O(26), and one O(8) atom to form CoO5 square pyramids that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Mg(3)O5 trigonal bipyramid, and  an edgeedge with one Co(1)O5 square pyramid. In the third Co site, Co(3) is bonded to one O(15), one O(22), one O(23), one O(28), and one O(6) atom to form CoO5 square pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Mg(3)O5 trigonal bipyramid, and  an edgeedge with one Co(4)O5 square pyramid. In the fourth Co site, Co(4) is bonded to one O(14), one O(22), one O(23), one O(25), and one O(7) atom to form CoO5 square pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(7)O4 tetrahedra,  a cornercorner with one P(8)O4 tetrahedra,  a cornercorner with one Mg(2)O5 trigonal bipyramid,  a cornercorner with one Mg(4)O5 trigonal bipyramid, and  an edgeedge with one Co(3)O5 square pyramid. There are eight inequivalent P sites. In the first P site, P(1) is bonded to one O(19), one O(23), one O(3), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(3)O5 square pyramid,  a cornercorner with one Co(4)O5 square pyramid,  a cornercorner with one P(7)O4 tetrahedra,  a cornercorner with one Mg(2)O5 trigonal bipyramid,  a cornercorner with one Mg(3)O5 trigonal bipyramid, and  a cornercorner with one Mg(4)O5 trigonal bipyramid. In the second P site, P(2) is bonded to one O(20), one O(24), one O(4), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one Co(3)O5 square pyramid,  a cornercorner with one P(8)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Mg(3)O5 trigonal bipyramid, and  a cornercorner with one Mg(4)O5 trigonal bipyramid. In the third P site, P(3) is bonded to one O(1), one O(17), one O(21), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one Co(4)O5 square pyramid,  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Mg(2)O5 trigonal bipyramid, and  a cornercorner with one Mg(4)O5 trigonal bipyramid. In the fourth P site, P(4) is bonded to one O(18), one O(2), one O(22), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one Co(3)O5 square pyramid,  a cornercorner with one Co(4)O5 square pyramid,  a cornercorner with one P(6)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid,  a cornercorner with one Mg(2)O5 trigonal bipyramid, and  a cornercorner with one Mg(3)O5 trigonal bipyramid. In the fifth P site, P(5) is bonded to one O(1), one O(11), one O(15), and one O(27) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(3)O5 square pyramid,  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid, and  a cornercorner with one Mg(3)O5 trigonal bipyramid. In the sixth P site, P(6) is bonded to one O(12), one O(16), one O(2), and one O(28) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(3)O5 square pyramid,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one Mg(2)O5 trigonal bipyramid, and  a cornercorner with one Mg(4)O5 trigonal bipyramid. In the seventh P site, P(7) is bonded to one O(13), one O(25), one O(3), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one Co(4)O5 square pyramid,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid, and  a cornercorner with one Mg(3)O5 trigonal bipyramid. In the eighth P site, P(8) is bonded to one O(10), one O(14), one O(26), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one Co(4)O5 square pyramid,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one Mg(2)O5 trigonal bipyramid, and  a cornercorner with one Mg(4)O5 trigonal bipyramid. There are twenty-eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one P(3) and one P(5) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one P(4) and one P(6) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one P(1) and one P(7) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one P(2) and one P(8) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mg(4), one Co(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Mg(3), one Co(3), and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Mg(2), one Co(4), and one P(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mg(1), one Co(2), and one P(4) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Mg(1) and one P(7) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Mg(2) and one P(8) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Mg(3) and one P(5) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Mg(4) and one P(6) atom. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one Mg(3), one Co(2), and one P(7) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Mg(4), one Co(4), and one P(8) atom. In the fifteenth O site, O(15) is bonded in a trigonal planar geometry to one Mg(1), one Co(3), and one P(5) atom. In the sixteenth O site, O(16) is bonded in a trigonal planar geometry to one Mg(2), one Co(1), and one P(6) atom. In the seventeenth O site, O(17) is bonded in a distorted trigonal planar geometry to one Mg(1), one Mg(4), and one P(3) atom. In the eighteenth O site, O(18) is bonded in a distorted trigonal planar geometry to one Mg(2), one Mg(3), and one P(4) atom. In the nineteenth O site, O(19) is bonded in a distorted trigonal planar geometry to one Mg(2), one Mg(3), and one P(1) atom. In the twentieth O site, O(20) is bonded in a distorted trigonal planar geometry to one Mg(1), one Mg(4), and one P(2) atom. In the twenty-first O site, O(21) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one P(3) atom. In the twenty-second O site, O(22) is bonded in a 3-coordinate geometry to one Co(3), one Co(4), and one P(4) atom. In the twenty-third O site, O(23) is bonded in a 3-coordinate geometry to one Co(3), one Co(4), and one P(1) atom. In the twenty-fourth O site, O(24) is bonded in a 3-coordinate geometry to one Co(1), one Co(2), and one P(2) atom. In the twenty-fifth O site, O(25) is bonded in a bent 150 degrees geometry to one Co(4) and one P(7) atom. In the twenty-sixth O site, O(26) is bonded in a bent 150 degrees geometry to one Co(2) and one P(8) atom. In the twenty-seventh O site, O(27) is bonded in a bent 150 degrees geometry to one Co(1) and one P(5) atom. In the twenty-eighth O site, O(28) is bonded in a distorted bent 150 degrees geometry to one Co(3) and one P(6) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgCoP2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.197
_cell_length_b   6.704
_cell_length_c   7.080
_cell_angle_alpha   77.922
_cell_angle_beta   65.642
_cell_angle_gamma   80.276
_symmetry_Int_Tables_number   1
_cell_volume   260.899
_cell_formula_units_Z   2
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
  Co  Co0  1  0.916  0.315  0.188  1.0
  Co  Co1  1  0.085  0.685  0.812  1.0
  Mg  Mg2  1  0.695  0.162  0.884  1.0
  Mg  Mg3  1  0.306  0.838  0.116  1.0
  O  O4  1  0.395  0.244  0.517  1.0
  O  O5  1  0.605  0.756  0.483  1.0
  O  O6  1  0.948  0.968  0.224  1.0
  O  O7  1  0.052  0.032  0.776  1.0
  O  O8  1  0.716  0.412  0.668  1.0
  O  O9  1  0.284  0.588  0.332  1.0
  O  O10  1  0.387  0.672  0.863  1.0
  O  O11  1  0.613  0.328  0.137  1.0
  O  O12  1  0.403  0.078  0.862  1.0
  O  O13  1  0.597  0.923  0.138  1.0
  O  O14  1  0.088  0.369  0.854  1.0
  O  O15  1  0.911  0.631  0.146  1.0
  O  O16  1  0.816  0.748  0.726  1.0
  O  O17  1  0.184  0.252  0.275  1.0
  P  P18  1  0.770  0.822  0.242  1.0
  P  P19  1  0.230  0.178  0.757  1.0
  P  P20  1  0.357  0.365  0.305  1.0
  P  P21  1  0.643  0.635  0.695  1.0
[/CIF]
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