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Angolaite

A rock subtype
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A peralkaline syenite consisting of alkali feldspar (87% in type material), titanaugite with aegirine-augite rims (5%), aegirine (0.7%), fayalite (3.6%) and accessory magnetite, apatite, aenigmatite, hastingsite and cancrinite.


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Unique IdentifiersHide

Mindat ID:
50523
Long-form identifier:
mindat:1:1:50523:7

Similar NamesHide

AngoliteA synonym of Inesite
AnkoleiteK2(UO2)2(PO4)2 · 6H2O
AnkyliteA synonym of Ancylite
ÁngelaiteA valid IMA mineral speciesCu2AgPbBiS4

Classification of AngolaiteHide

Mineralogy of AngolaiteHide

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.
Olivine > FayaliteFe2+2(SiO4)
Pyroxene > Clinopyroxene > AegirineNaFe3+Si2O6
Pyroxene > Clinopyroxene > Aegirine-augite(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
AenigmatiteNa4[Fe2+10Ti2]O4[Si12O36]
ApatiteCa5(PO4)3(Cl/F/OH)
Feldspathoid > Cancrinite(Na,Ca,◻)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
HastingsiteNaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)2
MagnetiteFe2+Fe3+2O4

Internet Links for AngolaiteHide

References for AngolaiteHide

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