Co3(BO3)2 crystallizes in the orthorhombic Pnnm space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form a mixture of edge and corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles range from 56-67°. In the second Co site, Co(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form a mixture of edge and corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles are 67°. B(1) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Co(2), two equivalent Co(1), and one B(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Co(2), two equivalent Co(1), and one B(1) atom.
Co3(BO3)2 crystallizes in the orthorhombic Pnnm space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form a mixture of edge and corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles range from 56-67°. Both Co(1)-O(1) bond lengths are 2.13 Å. There are two shorter (2.06 Å) and two longer (2.15 Å) Co(1)-O(2) bond lengths. In the second Co site, Co(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form a mixture of edge and corner-sharing CoO6 octahedra. The corner-sharing octahedral tilt angles are 67°. Both Co(2)-O(1) bond lengths are 2.07 Å. All Co(2)-O(2) bond lengths are 2.13 Å. B(1) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. The B(1)-O(1) bond length is 1.38 Å. Both B(1)-O(2) bond lengths are 1.39 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Co(2), two equivalent Co(1), and one B(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Co(2), two equivalent Co(1), and one B(1) atom.