Crystal gypsum is a kind of pure crystalline and transparent gypsum in white or other light colors. Crystal gypsum is carefully loaded by workers in jumbo bags and then by Conner. Exported. The application of this type of gypsum is in food industry, high-tech industries and other industries. Properties of gypsum gypsum
If gypsum is completely pure, it is colorless or white. Gypsum is found in a homogeneous mass sample, depending on the presence or absence of impurities of iron oxide, clay, lime, silica and carbon in mud, red, brown, yellow and smoky colors. Gypsum has granular, fibrous or porphyroblast tissue under a microscope. Its hardness is double offensive scale and it is easily scratched with nails and becomes cloudy due to flame with water loss.
Pure gypsum has 20.9% combined water, 46.6% So3 and 32.5% Cao is. According to ASTM standard, the minimum required purity for gypsum in industrial cases is 70% of gypsum. If most commercial gypsum has 75 to 95% purity.
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