Show source. Show detailed source information? Register for free Already a member? Log in. More information. Supplementary notes. Other statistics on the topic. Profit from additional features with an Employee Account. Please create an employee account to be able to mark statistics as favorites. Then you can access your favorite statistics via the star in the header. Profit from additional features by authenticating your Admin account.
Then you will be able to mark statistics as favourites and use personal statistics alerts. Save statistic in. XLS format. PNG format. PDF format. Show details about this statistic. Exclusive Premium functionality. Register in seconds and access exclusive features. Full access: To this and over 1 million additional datasets Save Time: Downloads allow integration with your project Valid data: Access to all sources and background information.
Exclusive Corporate feature. Corporate Account. Statista Accounts: Access All Statistics. Commercial forms of mica can be grouped as either unmanufactured or manufactured. Unmanufactured mica can be divided into two classes: sheet mica and scrap mica, which includes flake mica. The majority of manufactured mica, which has been shaped or punched, is used in electrical products.
The principal mica minerals used in commercial applications are biotite, muscovite and phlogopite. Biotite is generally used in its ground particulate form as a soil additive; muscovite and phlogopite have applications in sheet and ground forms. Muscovite sheet mica is recovered only from pegmatite deposits; phlogopite sheet mica is recovered from pyroxenites.
Muscovite is the principal mica used by the electrical industry to manufacture mica-based capacitors capable of operating at temperatures or frequencies that are destructive to polypropylene capacitors.
Phlogopite mica is used in plastic composites for automotive applications because of its dimensional stability, increased stiffness and improved heat distortion temperature. Manufactured mica includes built-up mica, glass-bonded mica, ground mica, phosphate-bonded mica and reconstituted mica. Scrap mica is material that is below specifications for sheet mica because of substandard size, color or quality. Most scrap mica is used as the raw material for two types of ground mica: wet-ground and dry-ground.
This resource is not being mined at present. However, these deposits tend to form sporadically and therefore are difficult to mine economically.
Muscovite mica cannot be used in temperatures that exceed degrees Celsius, whereas, phlogopite can be utilized at temperatures up to degrees Celsius.
Muscovite is still used more commonly in insulators because the price of phlogopite is quite high in comparison to other micas. Portland, Quebec. Lepidolite mica is an uncommon mica and has only in the past decade became available on the world markets in large quantities.
It is an ore of lithium and typically forms in granitic masses that contain high amounts of lithium. This mineral can be found in such places as Brazil, Russia and the west coast of the United States. Lithium as an element is often obtained from lepidolite mica to be used in such applications as lasers, T. Its primary use is in glass making. When added to the melted glass, lepidolite acts as an opacifier in opalescent and white glass that is widely used for table tops and jars.
It also enhances the strength of the glass. Lepidolite is not normally mined because of its properties as a mica, rather it is mined for its lithium content. However, lepidolite has an attractive violet colour that does make it valuable as an ornamental stone or as a mineral specimen. Lepidolite, Nambia. Biotite mica Biotite mica can be easily identified by its dark brown to black colour that is a result of the high ferro-magnesium content of the mineral.
It is a common rock forming mineral that is found in granite, syenite and other igneous rocks. It is also found in metamorphic rocks such as gneisses and schists. Most economical deposits are found in granitic pegmatite dykes. Biotite is rarely used in sheet form, and good crystals are extremely uncommon, as it is generally laced with impurities forming from the iron-bearing minerals. It is almost always used in the powdered form as a coating or other filler material in the roofing, building or other industries.
Moderately large deposits of biotite can be found near Bancroft, Ontario with sheets reaching 1 metre in diameter. Biotite Mica, Lake Cecebe, Ontario. Excellent information about uses of mica.
0コメント