Specification :

Molecular formula: Al2 [ Si4O10] ( OH) b 2 _CAS:
Nature: Monoclinic. Usually in bulk, flaked or radial clusters. Gray, sometimes microstrip light yellow or light green and other colors. Mok' s hardness 1 - 2. The relative density of 2.66 to 2.90. Translucent. Luster Glass, who was massive cereus luster. Cleavage planes were pearl sheen. Smooth with flu. Cleavage parallel to the bottom completely. Cleavage slice soft, with flexible. The thermal expansion coefficient of the average 6 C x 10-6. Refractoriness 1610 ~ 1710 C Calcined kaolin than small contraction.

Applications:
Ceramics production could be replaced by quartz, can reduce the thermal expansion rate products to prevent cracking of the glaze. As refractories and crucible materials used to be elected refractoriness higher. Mainly by acidic volcanic tuff and derived by hydrothermal alteration. Pyrophyllite to the main constituents of rocks, dense texture, is a traditional stone carving process. Flake the rough pyrophyllite and can be used for insulation, refractories, but also for ceramics, paints, paper and other industries. The glass industry can be introduced as one of the raw alumina. Pyrophyllite not as potassium, sodium, calcium, alkaline and alkaline-earth metal oxides, applicable to the manufacture or low-Al E-alkali glass and E-glass fiber.

Specification:
SiO2: 72.43% , Al2O3: 21.13% , Fe2O3: 0.13% , TiO2: 0.10% ,
Na2O: 1.2% , CaO: 0.13% , K2O: 1.93% , MGO: 0.07% , LOSS: 2.86