This section of the book "Thermodynamic Properties of Individual Substances" focuses on the thermodynamic properties of elements B (boron), Al (aluminum), Ga (gallium), In (indium), Tl (thallium), Be (beryllium), Mg (magnesium), Ca (calcium), Sr (strontium), and Ba (barium) and their compounds. The content is divided into two parts: Methods and Computation, and Tables. The chapter discusses the thermodynamic properties of 77 substances, including boron and its compounds with oxygen, hydrogen, halogens, sulfur, nitrogen, and carbon. The properties are provided for both the condensed and gaseous states, with specific data for each substance. The thermodynamic functions of boron in its crystalline, amorphous, and vitreous states are detailed, along with the vapor pressure of boron. The chapter also includes a foreword that highlights the updates and improvements made to the data since the publication of the Russian edition, including the inclusion of new tables and the recalibration of existing data. The references and sources used are extensive, reflecting the collaborative efforts of numerous scientists and researchers.This section of the book "Thermodynamic Properties of Individual Substances" focuses on the thermodynamic properties of elements B (boron), Al (aluminum), Ga (gallium), In (indium), Tl (thallium), Be (beryllium), Mg (magnesium), Ca (calcium), Sr (strontium), and Ba (barium) and their compounds. The content is divided into two parts: Methods and Computation, and Tables. The chapter discusses the thermodynamic properties of 77 substances, including boron and its compounds with oxygen, hydrogen, halogens, sulfur, nitrogen, and carbon. The properties are provided for both the condensed and gaseous states, with specific data for each substance. The thermodynamic functions of boron in its crystalline, amorphous, and vitreous states are detailed, along with the vapor pressure of boron. The chapter also includes a foreword that highlights the updates and improvements made to the data since the publication of the Russian edition, including the inclusion of new tables and the recalibration of existing data. The references and sources used are extensive, reflecting the collaborative efforts of numerous scientists and researchers.