The soft phengite is a component of schist, while another variety, isinglass, is found in old wooden stoves.
One variety of this mineral is named for DeWitt Clinton, and is an example of the "brittle" variety of this mineral. The soft phengite is a component of schist, while another variety, isinglass, is found in old wooden stoves. Interference patterns can help to detect another example of this mineral, as a characteristic "bird's eye" extinction pattern is produced. In addition to (*) muscovite, another member of this class of phylosilicates contains a significant amount of argon to be used for radioactive dating. These minerals are frequently used for electrical and thermal insulation due to their high dielectric strength. Biotite and lepidolite are additional examples of, FTP, what class of shiny aluminum silicates known for exhibiting perfect basal cleavage?
One variety of this mineral is named for DeWitt Clinton, and is an example of the "brittle" variety of this mineral.
{mica}s (prompt on clintonite before "phengite")