Biotite-Phlogopite Series
A synonym of Biotite
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Formula:
K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Synonym:
A synonym of Biotite
The designation "Biotite-Phlogopite Series" is outdated.
According to the new nomenclature of the Mica group (Rieder et al. 1998), "biotite" is redefined as a series name and is not longer a valid species. The redefined biotite series comprises trioctahedral micas with compositions between, or close to, the phlogopite-annite and eastonite-siderophyllite joins.
In earlier pre-1998 literature "biotite" has been used as name for the end-member of the solid solution series biotite-phlogopite. With a new understanding and definition of the micas, this term is hence no longer in use.
According to the new nomenclature of the Mica group (Rieder et al. 1998), "biotite" is redefined as a series name and is not longer a valid species. The redefined biotite series comprises trioctahedral micas with compositions between, or close to, the phlogopite-annite and eastonite-siderophyllite joins.
In earlier pre-1998 literature "biotite" has been used as name for the end-member of the solid solution series biotite-phlogopite. With a new understanding and definition of the micas, this term is hence no longer in use.
Unique Identifiers
Mindat ID:
8725 (as Biotite-Phlogopite Series)
677 (as Biotite)
677 (as Biotite)
Long-form identifier:
mindat:1:1:8725:0 (as Biotite-Phlogopite Series)
mindat:1:1:677:2 (as Biotite)
mindat:1:1:677:2 (as Biotite)
Internet Links for Biotite-Phlogopite Series
mindat.org URL:
https://www.mindat.org/min-8725.html
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References for Biotite-Phlogopite Series
Reference List:
