mica is a plastice, so it is a poor conductor of heat and electricity. Mica is a mineral, not a plastic. But you're correct about its insulating properties.
. The commercially important micas are muscovite and phlogopite, which are used in a variety of applications. Mica's value is based on several of its unique physical properties. The crystalline structure of mica forms layers that can be split or delaminated into thin sheets usually causing foliation in rocks. These sheets are chemically inert, dielectric, elastic, flexible, hydrophilic, insulating, lightweight, platy, reflective, refractive, resilient, and range in opacity from transparent to opaque
weak bonds between flat layers
Both are platy, silicate, mica group minerals with perfect cleavage in one direction.
Special properties are unusual properties a mineral may have that most minerals don't.
Mica is a silicate sheet often used for its properties in the electronics field. Mica's density is 2883 micrograms per cubic millimeter.
Mica is invaluable in the electrical industry because of its unique combination of physical, chemical and thermal properties, low power loss factor, dielectric constant and dielectric strength.Other names of MicaCat-goldCat-silverGlimmerGlistKaten-silberKatzen-silberKatzengoldOr des chatsRhomboidal Mica
gneiss has many properties depending on the type of gneiss it is but some common properties are fine or coarse grains, metamorphic "bands" on the rock, and it's composition which is feldspar,quartz, mica, and hornblende.
The difference is in their chemical composition and crystal structure which gives them different properties.
The definition of special properties are the unique features of a substance. They are commonly derived from other intrinsic and extrinsic properties.
Some of the sulfur special properties are odorless, tasteless and its color
Biotites comprise a range of different black mica minerals with different chemical composition and physical properties.