talkum

Talkum, also known as talc, is a mineral composed of magnesium silicate hydroxide with the chemical formula Mg3Si4O10(OH)2. It is the softest known mineral and is characterized by its greasy or soapy feel. Talkum is formed by the hydration and metamorphosis of minerals rich in magnesium, such as olivine, pyroxene, and amphibole. It typically occurs in metamorphic rocks such as schist, soapstone, and marble.

The mineral is mined in various locations around the world, with significant deposits found in China, India, Russia, the United States, and Brazil. Its unique properties, including softness, inertness, and hydrophobicity, make it useful in a wide range of applications. Historically, talkum has been used for thousands of years.

Industrially, talkum is processed and purified for use as a filler and reinforcing agent in plastics, rubber, and paints. It also serves as a component in ceramics and paper manufacturing. In consumer products, talkum is widely recognized for its use in baby powder and cosmetics, where it helps absorb moisture and reduce friction. It is also found in some pharmaceuticals and food products as an anti-caking agent. The safety of talkum, particularly in cosmetic applications, has been a subject of public discussion and scientific research.