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Sommaite

A rock subtype
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A medium- to coarse-grained variety of leucite-monzosyenite consisting of phenocrysts of titanian augite and lesser olivine in a groundmass of sanidine, labradorite and leucite. It occurrs abundantly among the ejected blocks of Mt Somma.


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Unique IdentifiersHide

Mindat ID:
48346
Long-form identifier:
mindat:1:1:48346:7

Classification of SommaiteHide

Mineralogy of SommaiteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > Alkali Feldspar > SanidineK(AlSi3O8)
Feldspar > Plagioclase > Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Feldspathoid > LeuciteK(AlSi2O6)
OlivineM2SiO4
Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6

Internet Links for SommaiteHide

References for SommaiteHide

Reference List:
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