The compound described by MgLa2Cr2(CoO6)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(11), one O(2), one O(3), and one O(6) atom. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(12), one O(2), one O(3), one O(4), one O(5), and one O(7) atom. In the second La site, La(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(11), one O(4), one O(5), one O(6), one O(8), and one O(9) atom. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(10), one O(3), one O(6), one O(7), and one O(8) atom to form distorted CrO5 trigonal bipyramids that share corners with two equivalent Co(1)O5 trigonal bipyramids and corners with two equivalent Co(2)O5 trigonal bipyramids. In the second Cr site, Cr(2) is bonded to one O(1), one O(12), one O(2), one O(4), and one O(9) atom to form CrO5 trigonal bipyramids that share corners with two equivalent Co(1)O5 trigonal bipyramids and corners with two equivalent Co(2)O5 trigonal bipyramids. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(11), one O(2), one O(6), one O(7), and one O(9) atom to form distorted CoO5 trigonal bipyramids that share corners with two equivalent Cr(1)O5 trigonal bipyramids and corners with two equivalent Cr(2)O5 trigonal bipyramids. In the second Co site, Co(2) is bonded to one O(1), one O(12), one O(3), one O(5), and one O(8) atom to form distorted CoO5 trigonal bipyramids that share corners with two equivalent Cr(1)O5 trigonal bipyramids and corners with two equivalent Cr(2)O5 trigonal bipyramids. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one La(2), one Cr(2), and one Co(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one La(1), one Cr(2), and one Co(1) atom. In the third O site, O(3) is bonded to one Mg(1), one La(1), one Cr(1), and one Co(2) atom to form distorted OLaMgCrCo trigonal pyramids that share  a cornercorner with one O(10)La2MgCr tetrahedra, corners with two equivalent O(11)La2MgCo tetrahedra,  an edgeedge with one O(10)La2MgCr tetrahedra, and  an edgeedge with one O(6)LaMgCrCo tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one La(1), one La(2), and one Cr(2) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one La(1), one La(2), and one Co(2) atom. In the sixth O site, O(6) is bonded to one Mg(1), one La(2), one Cr(1), and one Co(1) atom to form distorted OLaMgCrCo tetrahedra that share  a cornercorner with one O(11)La2MgCo tetrahedra,  a cornercorner with one O(10)La2MgCr tetrahedra,  an edgeedge with one O(11)La2MgCo tetrahedra,  an edgeedge with one O(10)La2MgCr tetrahedra, and  an edgeedge with one O(3)LaMgCrCo trigonal pyramid. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one La(1), one Cr(1), and one Co(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one La(2), one Cr(1), and one Co(2) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one La(2), one Cr(2), and one Co(1) atom. In the tenth O site, O(10) is bonded to one Mg(1), one La(1), one La(2), and one Cr(1) atom to form distorted OLa2MgCr tetrahedra that share  a cornercorner with one O(11)La2MgCo tetrahedra,  a cornercorner with one O(6)LaMgCrCo tetrahedra,  a cornercorner with one O(3)LaMgCrCo trigonal pyramid,  an edgeedge with one O(11)La2MgCo tetrahedra,  an edgeedge with one O(6)LaMgCrCo tetrahedra, and  an edgeedge with one O(3)LaMgCrCo trigonal pyramid. In the eleventh O site, O(11) is bonded to one Mg(1), one La(1), one La(2), and one Co(1) atom to form distorted OLa2MgCo tetrahedra that share  a cornercorner with one O(10)La2MgCr tetrahedra,  a cornercorner with one O(6)LaMgCrCo tetrahedra, corners with two equivalent O(3)LaMgCrCo trigonal pyramids,  an edgeedge with one O(10)La2MgCr tetrahedra, and  an edgeedge with one O(6)LaMgCrCo tetrahedra. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one La(1), one Cr(2), and one Co(2) atom. is represented by the CIF card [CIF]
data_La2MgCr2(CoO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.382
_cell_length_b   6.409
_cell_length_c   7.139
_cell_angle_alpha   90.573
_cell_angle_beta   90.026
_cell_angle_gamma   94.792
_symmetry_Int_Tables_number   1
_cell_volume   245.369
_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
  La  La0  1  0.984  0.884  0.749  1.0
  La  La1  1  0.512  0.655  0.248  1.0
  Mg  Mg2  1  0.016  0.070  0.270  1.0
  Cr  Cr3  1  0.503  0.103  0.493  1.0
  Cr  Cr4  1  0.033  0.434  0.981  1.0
  Co  Co5  1  0.542  0.105  0.003  1.0
  Co  Co6  1  0.082  0.443  0.514  1.0
  O  O7  1  0.110  0.397  0.260  1.0
  O  O8  1  0.176  0.210  0.943  1.0
  O  O9  1  0.168  0.152  0.544  1.0
  O  O10  1  0.206  0.674  0.995  1.0
  O  O11  1  0.227  0.704  0.508  1.0
  O  O12  1  0.380  0.022  0.245  1.0
  O  O13  1  0.546  0.037  0.750  1.0
  O  O14  1  0.647  0.334  0.458  1.0
  O  O15  1  0.703  0.381  0.051  1.0
  O  O16  1  0.741  0.914  0.451  1.0
  O  O17  1  0.790  0.923  0.064  1.0
  O  O18  1  0.931  0.487  0.743  1.0
[/CIF]
.
The compound described by MgLa2Cr2(CoO6)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(11), one O(2), one O(3), and one O(6) atom. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(12), one O(2), one O(3), one O(4), one O(5), and one O(7) atom. In the second La site, La(2) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(11), one O(4), one O(5), one O(6), one O(8), and one O(9) atom. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(10), one O(3), one O(6), one O(7), and one O(8) atom to form distorted CrO5 trigonal bipyramids that share corners with two equivalent Co(1)O5 trigonal bipyramids and corners with two equivalent Co(2)O5 trigonal bipyramids. In the second Cr site, Cr(2) is bonded to one O(1), one O(12), one O(2), one O(4), and one O(9) atom to form CrO5 trigonal bipyramids that share corners with two equivalent Co(1)O5 trigonal bipyramids and corners with two equivalent Co(2)O5 trigonal bipyramids. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(11), one O(2), one O(6), one O(7), and one O(9) atom to form distorted CoO5 trigonal bipyramids that share corners with two equivalent Cr(1)O5 trigonal bipyramids and corners with two equivalent Cr(2)O5 trigonal bipyramids. In the second Co site, Co(2) is bonded to one O(1), one O(12), one O(3), one O(5), and one O(8) atom to form distorted CoO5 trigonal bipyramids that share corners with two equivalent Cr(1)O5 trigonal bipyramids and corners with two equivalent Cr(2)O5 trigonal bipyramids. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one La(2), one Cr(2), and one Co(2) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Mg(1), one La(1), one Cr(2), and one Co(1) atom. In the third O site, O(3) is bonded to one Mg(1), one La(1), one Cr(1), and one Co(2) atom to form distorted OLaMgCrCo trigonal pyramids that share  a cornercorner with one O(10)La2MgCr tetrahedra, corners with two equivalent O(11)La2MgCo tetrahedra,  an edgeedge with one O(10)La2MgCr tetrahedra, and  an edgeedge with one O(6)LaMgCrCo tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one La(1), one La(2), and one Cr(2) atom. In the fifth O site, O(5) is bonded in a distorted T-shaped geometry to one La(1), one La(2), and one Co(2) atom. In the sixth O site, O(6) is bonded to one Mg(1), one La(2), one Cr(1), and one Co(1) atom to form distorted OLaMgCrCo tetrahedra that share  a cornercorner with one O(11)La2MgCo tetrahedra,  a cornercorner with one O(10)La2MgCr tetrahedra,  an edgeedge with one O(11)La2MgCo tetrahedra,  an edgeedge with one O(10)La2MgCr tetrahedra, and  an edgeedge with one O(3)LaMgCrCo trigonal pyramid. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one La(1), one Cr(1), and one Co(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one La(2), one Cr(1), and one Co(2) atom. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one La(2), one Cr(2), and one Co(1) atom. In the tenth O site, O(10) is bonded to one Mg(1), one La(1), one La(2), and one Cr(1) atom to form distorted OLa2MgCr tetrahedra that share  a cornercorner with one O(11)La2MgCo tetrahedra,  a cornercorner with one O(6)LaMgCrCo tetrahedra,  a cornercorner with one O(3)LaMgCrCo trigonal pyramid,  an edgeedge with one O(11)La2MgCo tetrahedra,  an edgeedge with one O(6)LaMgCrCo tetrahedra, and  an edgeedge with one O(3)LaMgCrCo trigonal pyramid. In the eleventh O site, O(11) is bonded to one Mg(1), one La(1), one La(2), and one Co(1) atom to form distorted OLa2MgCo tetrahedra that share  a cornercorner with one O(10)La2MgCr tetrahedra,  a cornercorner with one O(6)LaMgCrCo tetrahedra, corners with two equivalent O(3)LaMgCrCo trigonal pyramids,  an edgeedge with one O(10)La2MgCr tetrahedra, and  an edgeedge with one O(6)LaMgCrCo tetrahedra. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one La(1), one Cr(2), and one Co(2) atom. is represented by the CIF card [CIF]
data_La2MgCr2(CoO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.382
_cell_length_b   6.409
_cell_length_c   7.139
_cell_angle_alpha   90.573
_cell_angle_beta   90.026
_cell_angle_gamma   94.792
_symmetry_Int_Tables_number   1
_cell_volume   245.369
_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
  La  La0  1  0.984  0.884  0.749  1.0
  La  La1  1  0.512  0.655  0.248  1.0
  Mg  Mg2  1  0.016  0.070  0.270  1.0
  Cr  Cr3  1  0.503  0.103  0.493  1.0
  Cr  Cr4  1  0.033  0.434  0.981  1.0
  Co  Co5  1  0.542  0.105  0.003  1.0
  Co  Co6  1  0.082  0.443  0.514  1.0
  O  O7  1  0.110  0.397  0.260  1.0
  O  O8  1  0.176  0.210  0.943  1.0
  O  O9  1  0.168  0.152  0.544  1.0
  O  O10  1  0.206  0.674  0.995  1.0
  O  O11  1  0.227  0.704  0.508  1.0
  O  O12  1  0.380  0.022  0.245  1.0
  O  O13  1  0.546  0.037  0.750  1.0
  O  O14  1  0.647  0.334  0.458  1.0
  O  O15  1  0.703  0.381  0.051  1.0
  O  O16  1  0.741  0.914  0.451  1.0
  O  O17  1  0.790  0.923  0.064  1.0
  O  O18  1  0.931  0.487  0.743  1.0
[/CIF]
.