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Lusitanite

A rock subtype
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Name:
Named for Lusitania, the Roman name for Portugal.
A variety of peralkaline alkali-feldspar-syenite containing riebeckite and aegirine. Also used as family name for rocks consisting essentially of alkali feldspar.


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Unique IdentifiersHide

Mindat ID:
50419
Long-form identifier:
mindat:1:1:50419:5

Similar NamesHide

Classification of LusitaniteHide

QAPF_P_6.png

Alkali-felddspar-syenite is in section 6 of the QAPF diagram.

Mineralogy of LusitaniteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Feldspar > Alkali FeldsparA subgroup of the Feldspar Group, poor in calcium, and mostly rich in potassium.
Pyroxene > Clinopyroxene > AegirineNaFe3+Si2O6
Riebeckite◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2

Internet Links for LusitaniteHide

References for LusitaniteHide

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