It is also used in making molds for firing bricks due to its unique properties of thermal expansion, high melting point, stable structure, etc. Lead chromate is used as a yellow pigment in paints. ADVERTISEMENT Chromite: A specimen of chromite, the only ore of chromium, from the Transvaal area of South Africa.Chromium IV is used in manufacturing synthetic magnetic tape. Chromium is a chemical element with the symbol Cr and the atomic number 24.Chromium due to its different colorful compounds is used in dyes and paints.
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