Name | MICA |
Synonyms | MICA PHLOGOPITE SATIN MICA MAGNESIUM MICA |
CAS | 12251-00-2 |
Molecular Formula | C62H92CoN13O14P-4 |
Molar Mass | 1333.379541 |
Density | 2,8 g/cm3 |
Melting Point | >850°C |
TSCA | Yes |
Global mica mineral resources | mica mineral resources are widely distributed in the world, zimbabwe, Tanzania, the Soviet Union and other countries, with India in the first place; Broken Mica resources in the United States the most; Canada, Madagascar, the Soviet Union rich in phlogopite, to Canada is famous for phlogopite. The mica mineral resources in the United States are abundant, mainly in bluling and piedonte provinces in the western part of North Carolina and South Carolina. North Carolina now only produces crushed Mica. Mica resources in South Carolina are mainly sericite in schist and pegmite, but the scale is small. Canada has the world's largest ore body of phlogopite and is found in the town of Shuzo, laviolet county, Quebec, north of Montreal. Reserves of about 30 million tons. The Mica resources in the Soviet Union are rich, both in Muscovite and in phlogopite. The Muscovite deposits are mainly distributed in the Ma Ma-Chua area and the kalelia-Kola Peninsula area in ircusk prefecture. The deposit of phlogopite in Soviet Union is mostly of carbonate type, and the typical one is the kearla Peninsula kvodor deposit, with vermiculite in the upper layer and phlogopite in the lower part. there has been little progress in the exploration of mica mineral resources in the past 20 years, and almost no new industrial mica deposits have been found. Some old deposits have been nearly exhausted after many years of mining, the world Mica resources are still sufficient. |
Mica ore resources in China | the distribution of Mica ore deposits in China is uneven, although it is distributed in 20 provinces, municipalities and autonomous regions, the well-known mica ore producing areas are Xinjiang Altai, Sichuan Danba and Inner Mongolia tuguiwula. Qing, Lu, Tibet and other provinces also have certain resources or vision. The country has found 184 places of origin, of which 88 in Xinjiang, accounting for 67% of the country's reserves, 27 in Sichuan, accounting for 11.4 of the country's reserves; 15 in Inner Mongolia, accounting for 8.6 of the country's reserves; the remaining 54 sites accounted for 13% of the national reserves, distributed in Hebei, Shanxi, Liaoning, Jilin, Heilongjiang, Shandong, Jiangsu, Fujian, Guangdong, Guangxi, Hainan, Hubei, Henan, Yunnan, tibet, Qinghai and Shaanxi. The important types of mica deposits in China are the granite pegmatite type Muscovite deposit, the magnesium carbonate skarn type phlogopite deposit, the pegmite contact metasomatism of magnesium Silicon Muscovite deposit. There were more than 30 mining areas of Mica ore in China, and the main producing areas were: Xinjiang Altai white mica mine, Sichuan Danba white mica mine, Inner Mongolia tuguiwula white mica mine, Shaanxi Danfeng white mica mine, jilin Ji'an gold mica mine, Henan town Pingjin mica mine and Hebei Quyang white mica mine, etc. |
Muscovite and flaky phlogopite | Muscovite is widely distributed in gneiss, mica schist and phyllite, two mica granite and pegmatite occupy a significant position. A large number of Muscovites are often produced when silico-aluminous rocks are subjected to Coriolis petrogenization. Sometimes found in sandstone. Mainly produced in North China and Liaoning, Shandong, Jiangsu, Hubei, Hunan, Yunnan, Tibet. Muscovite is a widely produced rock-forming mineral, but the only one of industrial value is the Muscovite deposit in the granite pegmatite (India, Soviet Union). The characteristics of the deposit are that the pegmatite generally appear in groups of bands, forming rock belts or rock fields, the shape of the ore-bearing parent rock is complex, and the internal structure of the rock mass is also complex, the ore content and Mica quality often depend on the composition of surrounding rock and underlying rock. The patchy phlogopite is mainly derived from carbonate complex and secondary to the metamorphic deposit in skarn. Carbonatite Complex-type phlogopite deposits only occur in the platform environment, especially closely related to the alkaline-ultra-basic intrusion complex (sometimes volcanic-intrusion complex), controlled by deep and large faults, the rock mass is large in size, ranging from several tens to 2000 km2, and is the main source of phlogopite. The metamorphic phlogopite deposit in skarn is mainly produced in the ancient times, and the deposit is distributed in the magnesium Rock Zone. The rate of gold Mica is low, and the reserves are small, but the quality of the gold Mica is high (low iron content), and it is also paid attention. |
What is Mica? | Mica is a kind of layered silicate, a general term for mica minerals. There are many varieties, such as Muscovite, biotite, phlogopite, Lepidolite, etc., is the most widely distributed in the crust of rock-forming minerals, accounting for 3.8 of the total mass of the crust. There are mainly two kinds of Mica for industrial use: Muscovite and phlogopite. Mica has a layered structure composed of silicon-oxygen tetrahedrons, and the in-layer structure is compact with respect to the interlayer structure, so that it is easy to peel off into an elastic transparent sheet. The hardness is small. Good insulation, 1mm thick mica sheet can withstand the voltage of more than one hundred thousand volts. Strong heat resistance, Muscovite can resist 550 ℃, phlogopite can resist high temperature above 1 000 ℃ without changing the properties. Acid and alkali resistance and pressure resistance, each square centimeter can withstand 2 000~4000 weight. Mica is an important industrial raw material. High quality sheet mica is an important strategic material for the manufacture of various electrical equipment and radio components (such as tubes, large capacity capacitors and aviation gaskets and spark plugs). According to statistics, more than 90% of the high quality mica are used for electrical, radio and television industry. Poor quality mica is often used as the window of steel making furnace and other metallurgical furnaces, high temperature steam boiler water level indicator tube and regulator isolation plate, and also used in household electrical appliances (such as bread stove, electric iron, etc.). Mica and Mica powder are glued together to make mica board, Mica tape and Mica paper, which are used in building materials, plastics, paper making, dyes, paints and rubber. In recent years, the Soviet Union in the silicate coating mixed with a large number of mica powder made of Mica coating, has a strong resistance to moisture and fire resistance, and low cost, non-toxic, has a wide range of development prospects. Mica is mined in more than 20 countries in the world. Lepidolite is a mineral raw material for the extraction of lithium. India's Muscovite is famous for its excellent texture, supplying almost 3/4 of the world's demand. Mica minerals in China are mostly distributed in North China. In recent years, Mica substitute materials have developed rapidly and can meet the demand for part of the sheet mica. Synthetic fluorine mica is used to produce synthetic mica ceramics, which is a new type of high temperature insulating material. However, some natural flaky mica have unique properties, so far there is no suitable substitute. |