This collection sets out the results of various investigations into the chemical properties of refractory compounds and refractory-base alloys used in various fields of modern technology, together with original methods of analysis. The book is intended for analytical chemists, engineers, workers in scientific-research establishments and industrial laboratories, graduates, and students of the senior courses in chemical and metallurgical higher-education institutions. v CONTENTS Interaction of the Carbides of Group IV and V Transition Metals with Various Acids E. E. Kotlyar and T. N. Nazarchuk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Method of Quantitative X-ray Analysis for Determining the Amount of Free Carbon in Boron Carbide M. I. Sokhor and G. V. Sofronov . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Method of Separating and Determining the Free Carbon in Materials Containing Refractory Compounds L. A. Mashkovich and A. F. Kuteinikov . . . . . . . . . . . . . . . . . . . . . . . . . . . " 14 Stability of Boron-Carbon Compounds in Oxygen at High Temperatures L. E. Pechentkovskaya and T. N. Nazarchuk . . . . . . . . . . . . . . . . . . . . 20 Certain Chemical Properties of Boron Carbonitride L. E. Pechentkovskaya and T. N. Nazarchuk . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Oxidation of Boron, Gallium, and Indium Phosphides in Air L. L. Vereikina . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 High-Temperature Oxidation Resistance of Refractory Silicon Nitride-Silicon Carbide Materials I. N. Godovannaya and O. I. Popova . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . " 33 Production and Chemical Stability of the Hydrides of Group IV and V Transition Metals M. M. Antonova . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Chemical Analysis of the Reaction Products of Boron with Arsenic and Phosphorus A. A. Reshchikova and Z. S. Medvedeva . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Complexonometric Analysis of Molybdenum Alloys L. N. Kugai, O. F. Galadzhii, and V. I.