What is the meaning of Annite?

Noun. annite (countable and uncountable, plural annites) (mineralogy) A phyllosilicate mineral related to biotite.

Where is Phlogopite found?

Phlogopite micas are found primarily in igneous rocks, although it is also common in contact metamorphic aureoles of intrusive igneous rocks with magnesian country rocks and in marble formed from impure dolomite (dolomite with some siliclastic sediment).

How is biotite formed?

Biotite in the majority of cases forms when clay-rich sedimentary rocks are buried deep enough for the clay minerals to metamorphose to it. Biotite also forms in impure metamorphosed carbonate rocks and in metabasic rocks.

What group is biotite mica in?

common mica group
biotite, also called black mica, a silicate mineral in the common mica group. It is abundant in metamorphic rocks (both regional and contact), in pegmatites, and also in granites and other intrusive igneous rocks. For chemical formula and detailed physical properties, see mica (table).

How do you identify phlogopite?

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.

Does phlogopite have quartz?

It is found as individual crystals or, more often, as small clusters of crystals. Crystals can be up to a few centimeters in length but most are much shorter. The beryl in the quartz/pegmatite veins varies from colorless or white to light green, but in the phlogopite schist the color ranges from light to dark green.

What is the characteristics of biotite?

Properties of Biotite It is a black mica with perfect cleavage and a vitreous luster on the cleavage faces. When biotite is separated into thin sheets, the sheets are flexible but will break upon severe bending. When held up to the light, the sheets are transparent to translucent with a brown, gray, or greenish color.

Where are biotite found?

Location: Biotite is found in many rocks around the world. Noteable deposits are found in Evje, Norway; Bessnes, France; Uluguru mountains in Tanzania; Ontario, Canada; and Laacher See, Germany.

How much is biotite mica worth?

Black Mica Biotite at Rs 300/kilogram(s) | Argaghat | Giridih| ID: 9891952630.

What minerals are in biotite?

Members of the biotite group are sheet silicates. Iron, magnesium, aluminium, silicon, oxygen, and hydrogen form sheets that are weakly bound together by potassium ions.

What is the difference between phlogopite and biotite?

Phlogopite is one of the member minerals of the Biotite group, and is chemically and structurally similar to the other Biotite minerals. It represents the magnesium rich end member of the Biotite group, whereas the other forms of Biotite are rich in iron.

Where is kimberlite rock found?

Generally speaking, kimberlites are found only in cratons, the oldest surviving areas of continental crust, which form the nuclei of continental landmasses and have remained virtually unchanged since their formation eons ago.