Talc is a mineral composed of hydrated magnesium silicate, with the chemical formula H2Mg3(SiO3)4 or Mg3Si4O10(OH)2. It is widely used in its powdered form. It is found in fibrous masses, and the occurrence of the monoclinic crystalline form of talc is rare.
Talc deposits are divided into four main types:
It is possible to increase the magnesium content through various concentration methods, depending on the type of rock and its impurities, which can be removed to modify the quality of the talc. This is done in medical and technical industries.
Talc is used in various industries such as paper manufacturing, plastics, paints, coatings, rubber, food products, electrical cables, pharmaceuticals, cosmetics, ceramics, etc. Coarse gray-green talc, known as high-grade talc, is smooth and soapy. It is used for stoves, sinks, electric switchboards, and other purposes. It is often used as a protective material for laboratory countertops and electrical switches due to its resistance to heat, electricity, and acids.