Phlogopite is a yellow, greenish, or reddish-brown member of the mica family of phyllosilicates. It is also known as magnesium mica. Phlogopite is the magnesium endmember of the biotite solid solution series, with the chemical formula KMg 3 AlSi 3 O 10 (F,OH) 2.

Phlogopite: Mineral information, data and localities. Named in 1841 by Johann Friedrich August Breithaupt from the Greek φλογωποζ "phlogopos" for "resembling fire", in allusion to the red tint of the original specimens. Mica Group. Biotite-Phlogopite Series. The hydroxyl analogue of Fluorophlogopite and the magnesium analogue of Hendricksite.

Phlogopite is a common member of the mica mineral group. It has a chemical composition of KMg 3 (AlSi 3 O 10) (F,OH) 2. Crystals of phlogopite are often brown, but can be yellow, green or reddish brown. It is sometimes called "the brown mica".

Phlogopite. Comments: Exceptionally well-crystallized wine-colored pseudo-hexagonal crystal of phlogopite on white calcite. Location: Kalu Khan, Badakhshan, Afghanistan. Scale: 6 x 5.5 cm. © Fabre Minerals

2024年7月1日 · Phlogopite is a member of mica group family of phyllosilicates mineral. Color is a yellow, greenish, or reddish-brown. It is the magnesium endmember of the biotite stable answer series, with the chemical formulation KMg3AlSi3O10 (F, OH) 2.

phlogopite, basic aluminosilicate of potassium, magnesium, and iron that is a member of the common mica group. Varieties that contain only small amounts of iron are economically important as electrical insulators.

Phlogopite is a sporadic part of the mica group. It is not well popular even by the mineral collectors. However, it’s mined for its electrical and heat insulating prowess that are considered superior to some other micas.

Phlogopite is a common form of mica, and it is usually distinguished by its brownish-red color. Phlogopite, like the other important mica's, can come in very large crystal sheets. Thin sheets can be peeled off as layers, and thin layers maintain an interesting metallic-looking transparency.