[en] Temperature dependence of specific heat of lithium tetraborate was studied in low temperature range by the method of adiabatic calorimetry. It was established, that specific heat anomaly with maximum at 300.7 K existed in 120-305 K range. Enthalpy and entropy of transformation was equal to 3010 ± 50 J/mol and 12.0 ± 0.3 J K^-1 mol^-1 respectively. Thermodynamic properties of LiBF₄ under standard conditions are the following: C_p⁰(298.15K) = 122.8 ± 0.3 J K^-1 mol^-1, S⁰(298.15K) = 138 ± 0.3 J K^-1 mol^-1; H⁰(298.15K) -H⁰(0) = 20060 ± 50 J/mol