Synthesis and crystal structure of borate oxide Co3BO5

A mix-charge cation solid-state berate oxide Co3BO5 has been synthesized an d its structure has been determined by single-crystal X-ray methods. It cry stallizes in the orthorhombic space group Pbam with cell parameters a = 9. 2963(2), b = 11.948(2), c = 2.9737(6) Angstrom, V = 330.30(12) Angstrom (3) , Z = 4, M-r = 267.60, F(000) = 504, mu = 14.733, D-calcd = 5.381g/cm(3). T he structure was determined from 853 unique reflections and refined to the final residuals R = 0.0633 and wR = 0.1457. It has two kinds of Co cations, Co2+ and Co3+. It is composed of highly distorted [CoO4] squares and trian gular [BO3] groups that are connected to form infinite two-dimensional laye rs.