phlogopite
Noun: A brown variety of mica, a mineral belonging to the mica group. It is a hydrous silicate containing potassium, magnesium, and aluminum. It is characterized by its perfect basal cleavage, allowing it to split into thin, flexible sheets, and its color ranges from yellowish-brown to reddish-brown.
"Phlogopite" is a technical term used primarily in geology, mineralogy, and materials science. It refers specifically to this mineral species. It is typically used as a countable noun when referring to individual specimens or crystals, and as an uncountable/mass noun when referring to the material in general. * The geologist identified the shiny, brown flakes in the rock as phlogopite. * Phlogopite is often found in metamorphosed limestone and dolomite.* * This deposit contains several large books of phlogopite.*
- Industrial Context: Phlogopite is valued for its thermal stability and electrical insulating properties. It is used in applications such as electrical insulators, furnace windows, and as a filler in plastics and paints.
- Synthetic phlogopite, known as fluorophlogopite, is manufactured for specialized industrial uses.
- Mica (n): The broader mineral group to which phlogopite belongs, characterized by sheet silicate minerals with perfect cleavage. Muscovite (white mica) and biotite (black mica) are other common members.
- Biotite (n): A dark, iron- and magnesium-rich mica that is closely related to and often associated with phlogopite. Phlogopite is sometimes considered a magnesium-rich end-member of the biotite series.
- Brown mica: A descriptive, non-technical synonym.
- Magnesium mica: A term highlighting its key chemical component.
The word "phlogopite" has only one specific meaning in modern English: the brown mineral of the mica group as defined above. It does not have other general or idiomatic meanings.
-
a brown form of mica consisting of hydrous silicate of potassium and magnesium and aluminum
