What type of mineral is powder talc?
It is a magnesium-silicate magnesium-carbonated Mg3Si4O10 (OH) 2, crystallized in the monoclinic and tertiary clinic system, and is green to pale green or dark green, as well as white, white, silver, gray, Brown is usually white in powder form. Talc has a pearly gloss and a touch of fatty and semi-transparent, with a hardness of 1 and a density of 2.83-2.58. This mineral is in the category of silicate.
Lower talc is found naturally in pure form. This mineral, if it is pure, consists of 36/63% SiO2 =, 98/31% MgO = and 4/75% H2O =.
Minerals: CaMg3 (SiO3) 4, Serpentine 3MgO.2SiO2.2H2O, magnesite MgCO3, CaCO3 calcite, Mg7 (Si4O11) 2 (OH) 2, Mica K (Mg, Fe) 3AlSi3O10 (OH, F) 2, Chlorite 5 (Mg, Fe) O.Al2O3.3SiO2.4H2O, dolomite 2 (Ca, Mg) (CO3) are considered as mineral and associated with talc in the deposits of this mineral. Iron impurities such as limonite FeO (OH) .nH2O, Fe2O3 mannitol, FeS2, carbon, quartz and MnO manganese oxide may also be present in talcum. The chemical composition of talc and minerals is reported in the following table.
Powder Making Talc in NEGIN POWDER Company is produced and marketed in three groups:
1- Industrial Talc: Its color is dark green and for use in industries where talcum color is not important, such as insulation industry, waterproofing and so on.
2. Anti-acid talc: This talc is used in various meshes from 400 to 2500 mesh to be used in certain industries, which means that the reaction of talcum powder with acid is important. Its color is green and moderate and white is 78%.
3. Super Talc: Super Talc powder in various meshes from 400 to 2500 mesh to be used in paint and resin industries, masterbatches, engineering plastics and industries that are important for light and white talc. Super Talc powder is white with a white color of 91%. Talc husk is one of the best mines in Iran with a MgO = 29-31% and SiO2 = 60-65%. It is micronized.