Fenite
A rock classification type
This page is currently not sponsored. Click here to sponsor this page.
A high-temperature metasomatic rock characterised by the presence of alkali feldspar, sodic amphibole and sodic pyroxene. Nepheline, calcite and biotite/phlogopite may also be present and typical accessories are titanite and apatite. Fenites occur as zoned aureoles around alkaline igneous complexes, including carbonatites, forming in a wide range of host lithologies. They occur on the metre to kilometre scale.
Unique Identifiers
Mindat ID:
48654
Long-form identifier:
mindat:1:1:48654:3
Similar Names
| Cenite | A synonym of Kainite | |
| Feiite | A valid IMA mineral species - pending publication | Fe22+(Fe2+Ti4+)O5 |
| Felite | A synonym of Larnite | |
| Fengite | A synonym of 'Phengite' | |
| Oenite | A valid IMA mineral species | CoSbAs |
| Veenite | A valid IMA mineral species | Pb16Sb9-xAs7+xS40, x ~ 0-0.5 |
| Venite | A rock classification type | |
| Yenite | A synonym of Ilvaite | |
| Yvonite | A valid IMA mineral species | Cu(HAsO4) · 2H2O |
Classification of Fenite
Mineralogy of Fenite
Essential minerals - these are minerals that are required within the classification of this rock:
| Alkali pyroxene | A petrological name for the sodium-rich pyroxenes aegirine and aegirine-augite. |
| Feldspar > Alkali Feldspar | A subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium. |
| Sodic amphibole | A petrological term for amphibole rich in sodium. |
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
| Apatite | Ca5(PO4)3A |
| Calcite | CaCO3 |
| Feldspathoid > Nepheline | Na3K(Al4Si4O16) |
| Mica > Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| Mica > Phlogopite | KMg3(AlSi3O10)(OH)2 |
| Titanite | CaTi(SiO4)O |
Internet Links for Fenite
mindat.org URL:
https://www.mindat.org/min-48654.html
Please feel free to link to this page.
Please feel free to link to this page.
References for Fenite
Reference List:
