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.
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.
A perthite is an intimate intergrowth of sodic and potassic feldspar resulting from subsolidus exsolution (unmixing of two minerals). Strictly speaking a perthite.
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.
Perthite. Property. Value. Comments. Formula, (K, Na)AlSi3O8, K-feldspar (KAlSi3O8) with albite (NaAlSi3O8) intergrowth. Crystal System, Not applicable.
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