Mineral group

Biotite

A name in universal scientific use that the IMA list does not accept as a species: it denotes the series between annite and phlogopite. Lithoen records it as a series so that the name remains usable without being mistaken for a species.

group kind: series

How this record is known

2
Settled consensus: Cited as the accepted position of the discipline.

2 of 2 claims on this page cite at least one registered source. Counts describe how each statement is known, not how likely it is to be true.

What Lithoen records

Each claim states how it is known and cites its evidence.

EstablishedThe annite–phlogopite series.

What is universally called biotite is the series between annite, the iron end member, and phlogopite, the magnesium end member — both accepted species, while “biotite” itself is not.

Evidence support: Supported by the cited evidence one source

Evidence: Commission on New Minerals, Nomenclature and Classification, International Mineralogical Association 2026 Primary authority

EstablishedNot a species; a series.

“Biotite” is not an accepted mineral species: no entry of that name appears in the IMA List of Minerals. It denotes the series between annite and phlogopite.

definition basis: Absence from the IMA List of Minerals, which is the list of accepted species.
precision note: The name remains in ordinary scientific use. It is recorded as a grouping so that it stays usable without being mistaken for a species.

Evidence support: Supported by the cited evidence one source

Evidence: Commission on New Minerals, Nomenclature and Classification, International Mineralogical Association 2026 Primary authority

In the knowledge graph

Biotite has member Annite
Biotite member of Mica
Biotite has member Phlogopite

Record last updated 2026-09-06. Corrections follow the published corrections policy; superseded claims are retained, never silently edited.