Sodium sulfate (also known as sodium sulphate or sulfate of soda) is the inorganic compound with formula Na2SO4 as well as several related hydrates. All forms are white solids that are highly soluble in water. With the decahydrate is a major commodity chemical product. It is mainly used as a filler in the manufacture of powdered home laundry detergents and in the Kraft process of paper pulping for making highly alkaline sulfides.
Calcium Fluoride (CaF2) is a very popular mineral, and it naturally occurs in all colours of the spectrum. It is one of the most varied coloured mineral in the mineral kingdom, and the colours may be very intense and most electric. Pure CaF2 is colourless and the colour variations are caused by various impurities. It is a mineral with veritable bouquet of brilliant colours from hallmark colour purple to blue, green, yellow, colourless, brown, pink, black and reddish orange. It is an important commercial source of fluorine. Calcium Fluoride plays a vital role in the manufacturing Industry and major consuming industries are chemical, cement, iron & steel, electrode, etc. It is also used in the production of synthetic cryolite without which aluminium extraction is not possible.
Aluminium fluoride is a colourless chemical compound with a molecular formula AlF3. It is mainly used in the production of aluminium. It occurs naturally as oskarssonite and rosenbergite. It can be manufactured synthetically too. The majority of aluminium fluoride is produced by treating hydrogen fluoride with alumina or aluminium oxide at 700 °C.