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New periclase-spinellide refractories of grade PShSKh have been developed based on melted periclase with 97% MgO and synthesized chrome spinellides.New periclase-spinellide refractories have been developed for extremely hard service conditions (certain areas of converters, electric steel-melting furnaces, the slag belt of teeming ladles, the lining of furnace-ladle units, machines for continuous steel casting, inserts for slide gate plates, nonferrous metallurgy furnaces, etc.). The initial materials are melted periclase and synthetic chrome spinellides (SKhSh), whose formulas and compositions are listed in Table 1. The content of impurities in all chrome-spinellides is not more than 0.5% SiO 2 and not more than 0.8% CaO.The peculiarities of synthesized chrome spinellides are their different oxide ratios Cr 2 O 3 :Al 2 O 3 (from 1.01 to 2.53)