A ceramic brick was obtained on the basis of intershale clay and slag from burning brown coal without using traditional natural raw materials. Studies have shown that the ferrous compounds on the surface of the test samples (the oxidizing environment predominates) is mainly represented by hematite, and in the center (reducing environment) - magnetite. In this case, Fe 3+ is reduced to Fe 2+ and an early formation of a liquid phase occurs, which favors the occurrence of reactions of mullite formation, which determines the main physicomechanical parameters of ceramics. In the studied samples, there are mainly relatively large pores (up to 40 ?m) oval and pores of the type & # 171; channels & # 187;
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