[en] Results of studying the ternary system Li₂O-Al₂O₃-B₂O₃ using the methods of DTA, RPA and IR spectroscopy are presented. The formation of five new borates in the system: 3Li₂OxAl₂O₃x2B₂O₃; 2Li₂OxAl₂O₃x2B₂O₃, Li₂OxAl₂O₃xB₂O₃; Li₂OxAl₂O₃x2B₂O₃ and Li₂Ox2Al₂O₃x2B₂O₃ is established, their melting points being equal to 730, 785, 760, 850 and 775 deg C, respectively. Certain characteristics of the compounds are studied and the boron coordination number in them is determined. Projection of the liquidus surface is plotted and triangulation of the ternary system is performed