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Borolanite

A rock subtype
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A local name for a coarse-grained variety of nepheline-syenite consisting of alkali feldspar, nepheline (or its alteration products), melanite and biotite, and sometimes characterized by the presence of pseudoleucite.


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Unique IdentifiersHide

Mindat ID:
50568
Long-form identifier:
mindat:1:1:50568:0

Similar NamesHide

BerliniteA valid IMA mineral speciesAlPO4
BerylloniteA valid IMA mineral speciesNaBePO4
BortolaniteA valid IMA mineral speciesCa2(Ca1.5Zr0.5)Na(NaCa)Ti(Si2O7)2(OF)F2

Classification of BorolaniteHide

Mineralogy of BorolaniteHide

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.
Feldspathoid > NephelineNa3K(Al4Si4O16)
MelaniteCa3Fe3+2(SiO4)3
Mica > BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
PseudoleucitePseudomorph after leucite.

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Borolanite associated with MelaniteCa3Fe3+2(SiO4)3

Internet Links for BorolaniteHide

References for BorolaniteHide

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