The structurally-chemical state and classification phases of the oxide and metallic system iron-silicon-titanium-oxygen. The structurally-chemical analysis of the state duplex-system titanates-titanades of the iron. Message 1 - B. F. Belov; A. I. Trotsan; I. L. Brodetskij; I. V. Rjabchikov; V. S. Kobets (Casting processes, 2015)