Mica Melting Point

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Micas are highly pigmented mineral powders that add shimmering, pearlescent color to resin. They are used to tint and color epoxy resin art, like resin jewelry, and can also be mixed with a clear base to create a matte paint for resin casting projects, such as river tables and paintings. A small amount of mica powder will go a long way when used in your resin projects, making it easy to achieve the desired effect for any project size.

Mica is a generic term for a group of hydrous aluminum silicate minerals with a layered or plant-like structure. The two commercially important micas are muscovite (hydrous aluminium potassium silicate, K2(AlSi3O10)(F, OH)2H) and phlogopite (potassium magnesium aluminum silicate hydroxide). Vermiculite is a synthetic mica that has similar physical properties but does not melt. Micas cleave into thin sheets that are flexible and elastic. They are translucent to opaque, resilient, reflective, refractive, dielectric, chemically inert, lightweight, and water resistant.

In pseudotachylite, a large portion of the mica content is in the form of negatively charged potassium feldspar. This is most likely caused by fluid-absent peritectic mica melting. This is probably a common process in many granite-hosted pseudotachylite analyses, and this may explain why the mixing model used in this paper cannot balance the positive contribution of plagioclase to the melt composition. A different mixing model may be needed to predict the potassium contents of granite-hosted pseudotachylite. Moreover, this model is likely to overestimate the melting proportions of refractory minerals in the low-volume mica melts.