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The various types of mica do not contain elements which are significantly radioactive, e.g. K, Al, Si, O, F, H, Mg. (Rare isotopes of several common elements are part of the normal background radiation and no excess of these is found in mica.) Of course, there is the possibility that at any given mining site there can be contamination from other sources, but that is true of anything. Some examples showing the elements in mica are given below.
The mica group contains 37 different sheet silicate (phyllosilicate) minerals. The chemical formula for the various types is complicated. Here are two common examples.
Common mica (also called Muscovite ) is KAl2(AlSi3O10)(F,OH)2, or (KF)2(Al2O3)3(SiO2)6(H2O). Magnesium mica (Phlogopite) has the chemical formula KMg3AlSi3O10(F,OH)2. There are many more forms in the mica group of 37 phyllosilicate minerals.
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What was the setting in the story Stargirl?
the setting of Stargirl is in Mica (Mica Area High School), a made-up town in Arizona. Great part of the story happens there.
How does the mica mineral break?
Mica has perfect basal cleavage.
What is the texture of mica?
rough
Does the mica mineral break easily?
On Moh's scale Mica group minerals ranges 2.5 to 3.0 in hardness.
Why is indias supply of mica important?
Mica is a key component in electrical equipment. In the years 2006-2007 India exported 15.21 million US dollars worth of mica, and that number has been steadily growing.
