Crystalline form of calcite calcium carbonate in the hexagonal system. The density of calcitine is 2.75 g / cm3. The melting point is 1339 ° C under 1.025 atmospheres pressure. Calcite is the main element of the limestone. The pure crystal contains 56% calcium oxide (CaO), 44% carbon dioxide (CO2). In impure crystals, some of the calcium may have been replaced by Fe, Mg and Mn. Calcite is in the form of mineral veins in nature and is often formed with lead, zinc, silver and other ores.
Calcite is a crystallized calcium carbonate whose chemical formula is CaCO3. It can be transparent, white, yellow, rustic green and bluish color. Strength is 3, specific weight is 2.71. Cold and dilute hydrochloric acid (salt spirit) decomposes with severe foaming. It is drawn with a knife. It dissolves in CO2 water to make Ca (HCO3)2.
It is rarely found primarily in erectile rocks, especially in pegmatites. It is usually a secondary mineral. There are plenty in the country. It is usually the main component of carbonated sedimentary rocks (eg limestones) and marbles. It is processed in various forms and used as filling material in paint, paper, plastic sector. Calcite used in the plastic industry; There are 2 types, covered and uncoated.