Talc is the world's softest mineral. Although all talc ores are soft, platy, water repellent and chemically inert, no two talcs are quite the same. Talc is a vital part of everyday life. The magazines we read, the polymers in our cars and houses, the paints we use and the tiles we walk on are just some of the products that talc enhances.Although it has very little chemical reactivity, talc does have a marked affinity for certain organic chemicals, i.e. it is organolic. Above 900A C, talc progressively loses its hydroxyl groups and above 1050A C, it re-crystallizes into different forms of enstatite (anhydrous magnesium silicate). Talc's melting point is at 1500A C.TECHNICAL DETAILS / SPECIFICATIONS. No. Parameter Percentage 1 Loss on Ignition 4% to 6%2 Loss on Drying 0.05%3 Acid soluble substances (as SO4) 2% to 3%4 Extractable Fluoride 0.2% to 20%5 (at 10%) 8.5% to 9.5%6 Soluble Salts 0.2%7 Absorption in Oil 30 to 358 Asbestos Fibers Nil9 Arsenic Nil10 SiO2 60 to 6711 MgO 29 to 3212 Fe2O3 0.1513 CaO As per requirement14 Al2O3 0.6% to 1%
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