Tinguaite
A rock subtype
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About Tinguaite
Name:
Named after the Tinguaí Volcano (Nova Iguaçu Volcano), Brazil, where the rock type was first identified.
A variety of phonolite consisting of alkali feldspar, nepheline with or without other foids, aegirine and sometimes biotite. It is characterized by "tinguaitic texture" in which needles of aegirine occur interstitially in a mosaic of alkali feldspar and foids.
Unique Identifiers
Mindat ID:
51935
Long-form identifier:
mindat:1:1:51935:5
Similar Names
| Tancaite-(Ce) | A valid IMA mineral species | FeCe(MoO4)3 · 3H2O |
| Tanguéite | A synonym of Tangeite |
Classification of Tinguaite
Mineralogy of Tinguaite
Essential minerals - these are minerals that are required within the classification of this rock:
| Feldspar > Alkali Feldspar | A subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium. |
| Feldspathoid > Nepheline | Na3K(Al4Si4O16) |
| Pyroxene > Clinopyroxene > Aegirine | NaFe3+Si2O6 |
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
| Feldspathoid | A family of rock-forming minerals consisting of aluminosilicates of sodium, potassium, or calcium and having too ... |
| Mica > Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
Internet Links for Tinguaite
mindat.org URL:
https://www.mindat.org/min-51935.html
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References for Tinguaite
Reference List:
Localities for Tinguaite
Showing 77 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Khibiny Massif, Murmansk Oblast, Russia