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Dolomite is a common rock-forming mineral. It is the primary component of the sedimentary rock known as dolostone and the metamorphic rock known as dolomitic marble. Limestone that contains some dolomite is known as dolomitic limestone.It is rarely found in modern sedimentary environments but dolostones are very common in the rock record. They can be geographically extensive and hundreds to thousands of feet thick. Most rocks that are rich in dolomite were originally deposited as calcium carbonate muds that were post-depositionally altered by magnesium-rich pore water to form dolomite.It is a double carbonate of calcium and magnesium (CaCO3, MgCO3). It is one of the important raw materials used in the iron and steel, ferro-alloys, glass, alloy steels, fertilizer industry, etc. Dolomite chips are also used in flooring tiles.Dolomite has a hardness of 3 1/2 to 4 on Mohs hardness scale and is sometimes found in rhombohedral crystals with curved faces.It is very similar to the mineral calcite. Calcite is composed of calcium carbonate (CaCO3) while dolomite is a calcium magnesium carbonate (CaMg(CO3)2). These two minerals are one of the most common pairs to present a mineral identification challenge in the field or classroom. The best way to tell these minerals apart is to consider their hardness and acid reaction. Calcite has a hardness of 3 while dolomite is slightly harder at 3 1/2 to 4. Calcite is also strongly reactive with cold hydrochloric acid, while dolomite will effervesce weakly with cold hydrochloric acid.It is a Calcium magnesium carbonate with a chemical composition of CaMg(CO3)2. Synonyms includes Marble, Limestone, dolostone etc.   SILENT FEATURES Dolomite Chemical Properties/Composition :CaCO3 : 56.5%MgCO3 : 43.0%CaO : 31.5%MgO : 20.5%Fe2O3 : 0.5%SiO2 : 1.5%Al2O3 : 0.5% Dolomite Physical Properties :Appearance : White Crystalline Powder.Sp. gravity : 2.6 – 2.8Oil absorption : 12 to 14Volatile content : Max. 0.5%PH of 10% slurry : 8.5 to 9.0Coarse Particles : Max. 0.5%   DOLOMITE INDUSTRIAL APPLICATIONS & USES : Paints : Used widely in cement paints, exterior paints, primers, putties, powder coatings and industrial finishes. Plastic : Used in PVC footwear, PVC pipes, cables and others. Paper : Used as integral filler in paper to give smoothness and gloss. Adhesives : Used in adhesives and carpet backing. Rubber : It is used in toothpaste, cosmetic and soap industry. Glass : High-grade dolomite with as low content as possible is required by the glass industry. Glass grade dolomite is typified by its purity and consistency. Fertilizer : Dolomite for use in fertilizer industry must have CaCO3 + MgCO3 90% (min.) and SiO2 5% max.

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