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Perthite | mineralogy | Britannica

Perthite: Perthite, any member of a class of alkali feldspars in which tiny crystals of sodium-rich feldspar (albite; NaAlSi3O8) are intimately intergrown with, but.

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Perthite - Minerals

Perthite is an intergrowth of two different Feldspar minerals in one rock. Perthite is usually composed of veins or stripes of one feldspar running through a.

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ALEX STREKEISEN-Perthite-

A perthite is an intimate intergrowth of sodic and potassic feldspar resulting from subsolidus exsolution (unmixing of two minerals). Strictly speaking a perthite.

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Perthite - Wikipedia

Perthite is used to describe an intergrowth of two feldspars: a host grain of potassium-rich alkali feldspar includes exsolved lamellae or irregular intergrowths of.

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Perthite - Smith College

Perthite. Property. Value. Comments. Formula, (K, Na)AlSi3O8, K-feldspar (KAlSi3O8) with albite (NaAlSi3O8) intergrowth. Crystal System, Not applicable.

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