MgCo2(BO3)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form MgO4 tetrahedra that share corners with three equivalent Co(1)O4 tetrahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form CoO4 tetrahedra that share corners with three equivalent Mg(1)O4 tetrahedra. In the second Co site, Co(2) is bonded in a 4-coordinate geometry to one O(1), one O(4), one O(5), and one O(6) atom. There are two inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one Co(1), one Co(2), and one B(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mg(1), one Co(1), and one B(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mg(1), one Co(1), and one B(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Mg(1), one Co(2), and one B(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one B(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one B(2) atom.
MgCo2(BO3)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form MgO4 tetrahedra that share corners with three equivalent Co(1)O4 tetrahedra. The Mg(1)-O(1) bond length is 2.04 Å. The Mg(1)-O(2) bond length is 1.99 Å. The Mg(1)-O(3) bond length is 1.98 Å. The Mg(1)-O(4) bond length is 1.95 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form CoO4 tetrahedra that share corners with three equivalent Mg(1)O4 tetrahedra. The Co(1)-O(1) bond length is 2.06 Å. The Co(1)-O(2) bond length is 1.99 Å. The Co(1)-O(3) bond length is 1.98 Å. The Co(1)-O(6) bond length is 1.96 Å. In the second Co site, Co(2) is bonded in a 4-coordinate geometry to one O(1), one O(4), one O(5), and one O(6) atom. The Co(2)-O(1) bond length is 2.36 Å. The Co(2)-O(4) bond length is 1.93 Å. The Co(2)-O(5) bond length is 1.89 Å. The Co(2)-O(6) bond length is 1.94 Å. There are two inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The B(1)-O(1) bond length is 1.41 Å. The B(1)-O(2) bond length is 1.38 Å. The B(1)-O(3) bond length is 1.38 Å. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. The B(2)-O(4) bond length is 1.40 Å. The B(2)-O(5) bond length is 1.35 Å. The B(2)-O(6) bond length is 1.41 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Mg(1), one Co(1), one Co(2), and one B(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mg(1), one Co(1), and one B(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mg(1), one Co(1), and one B(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Mg(1), one Co(2), and one B(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one B(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one B(2) atom.