B6 O13 Co4

B₆O₁₃Co₄ is a mixed-valence cobalt borate ceramic compound that combines boron oxide and cobalt phases into a complex oxide structure. This material is primarily investigated in research contexts for semiconductor and electrochemical applications, where the cobalt content can provide catalytic activity and the borate framework offers structural stability. While not yet widely commercialized, cobalt borates represent a growing family of materials explored for energy conversion, catalysis, and solid-state device applications where the interplay between cobalt redox chemistry and boron's structural role is leveraged.