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Analcimite

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A fine to medium grained, extrusive or hypabyssal igneous rock consisting mainly of analcime and pyroxene (usually titanaugite). Other feldspathoids, plagioclase, and/or olivine may be present. Apatite, sphene, and opaque oxides may be present as accessories. On the QAPF diagram, it is a foidite consisting of >90% feldspathoids, mostly analcime, with <10% mafic minerals.


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Classification of AnalcimiteHide

Analcimite appears in field 15c in the QAPF diagram.

Analcimite is found in field F in the TAS diagram.

Sub-divisions of AnalcimiteHide

Mineralogy of AnalcimiteHide

Essential minerals - these are minerals that are required within the classification of this rock:
AnalcimeNa(AlSi2O6) · H2O
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
OlivineEquivalent to Fayalite-Forsterite Series; usually a more or less Fe-bearing forsterite.
Titanian Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6

Synonyms of AnalcimiteHide

References for AnalcimiteHide

Reference List:
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Le Maitre (ed.) (2002) Igneous Rocks - A Classification and Glossary of Terms. Cambridge Press

Internet Links for AnalcimiteHide

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