For general use, reactivity of fused quartz is unreactive, including when exposed to most acids, metals, chlorine and bromine at ordinary temperatures. It is slightly attacked by alkaline solutions, the reaction rate increasing with temperature and concentration of solution. Phosphoric acid will attack fused quartz at temperatures about 150 °C. Hydrofluoric acid alone will attack at all temperatures. Carbon and some metals will reduce fused quartz; basic oxides, carbonates, sulfates, etc., will react with it at elevated temperatures.
Quartz and fluorite are two very different minerals, each with a different hardness and crystal structure, although on the surface they look very similar. Both…Continue reading
Quartz and rock crystal are both abundant minerals found throughout the world in the Earth’s crust. According to Mindat.org, “Quartz is the most common mineral…Continue reading