Chrome oxide green, also known as chromium oxide, chromium oxide, molecular weight of 151.99. Department of the six party system, green powder. The density of 5.21g/cm3, Mohs hardness of 8.5~9, close to the corundum (Al2O3), second only to diamond, while more than quartz SiO2, topaz Al2 (SiO4) (F, OH) 2 and ZrSiO4 U-Pb zircon). Refractive index of 2.5 (coverage), specific heat capacity (20 DEG C) /0.17J/(g, K). Insoluble in water, acid and organic solvent, slightly soluble in concentrated sodium hydroxide solution, dissolved in concentrated perchloric acid solution with sodium bromate solution, hot hot or boiling phosphoric acid. To light, air, and corrosive gases (H2S, SO2) is extremely stable, excellent weatherability. The heat stability, the melting point of 2454 DEG C, the boiling point of 3000 DEG C, is a high-quality refractory materials. Chromic oxide mainly used in metallurgy, pigment, grinding and polishing, refractory materials and new developed melt spray paint etc..
