What is Mica?
Mica is a naturally occurring, highly lamellar phyllosilicate of aluminium and potassium that exhibits an almost perfect basal cleavage. This means that mica particles can be easily split into thin, often transparent sheets. Amongst platy minerals, micas are unique due to the broad range of particle sizes naturally available, from microns up to several centimeters. Mica is often referred to as ‘glimmer’, a description of the visual effect that it imparts.
Imerys mica powders are extracted from our deposits along with kaolin and feldspar. They are distinguished from other silicate minerals mainly by their high aspect ratio and elasticity. Using a variety of selection and processing methods we separate mica from the other minerals, creating materials with a range of particle sizes.
Geology
Mica is widely distributed and occurs in igneous, metamorphic and sedimentary rocks. Large crystals of mica used for various applications are typically mined from granitic pegmatites.
Physical properties
- Chemical resistance
- Thermal conductivity (anisotropic)
- Heat stability, passive fire retardancy
- Vibration damping
- Low coefficient of friction (lubricants, extrusion)
- Hydrophilic
- Flexible
- Building Products
- Paints & Coatings
- Plastics
- Sound damping
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Building Products
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Paints & Coatings
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Plastics
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Sound damping
