Mica is actually an aluminosilicate mineral with layered structure of potassium, aluminum, magnesium, iron and lithium. It has a huge family, including muscovite, biotite, phlogopite, lepidolite, zinc mica, copper mica and so on. Widely distributed in magmatic rocks, sedimentary rocks and metamorphic rocks.
Mica has a glassy luster, so some places are called "cellophane". The structure of mica is very strange, and some of them are folded like books and peeled into elastic sheets layer by layer with a knife or nails. Mica will not burn in a fierce fire and will not rot after being buried underground for a long time. The large mica sheet is about two meters square, which is often used by the ancients to make screens, while the smaller mica sheet is used to make transparent windshields for windows and lanterns. Muscovite, as a traditional Chinese medicine, has the effects of improving eyesight, stopping dysentery, tonifying kidney and cooling, calming five internal organs and killing tendons.
/kloc-mica, as an insulating material, has been used in electronic and electrical industries in the 0/9th century. From the big motor to the small capacitor in the radio, it has its own position. Electric irons, ovens, hair dryers, rice cookers and electric cups all use mica products as insulating materials and supports. Mica powder is widely used in welding electrodes, linoleum paper, fire fighting equipment, coatings, mica ceramics and other fields.
About 25 countries in the world produce mica. India is the largest producer of high-quality muscovite, followed by Brazil and Margash. The largest output of mica powder is in the United States. High-quality industrial muscovite occurs in granite pegmatite. Altai Mountain in Xinjiang, China is one of the world-famous muscovite producing areas. Sichuan Province has not only muscovite produced in Danba, but also a "Jinchuan" where mica is everywhere: "There are many mica schists in the territory, and weathered mica fragments can be seen everywhere, shining in the sun ... dazzling, dazzling, people coming and going, and the eyebrows are also golden." Like a mythical world. Mica and gold are produced there.
Transparent heat-resistant mica is an ideal window for smelting furnace. Mica is called "Huapilian", "Tian Bing" and "Melaleuca Paper" in building materials industry.