perthite

American

[pur-thahyt] / ˈpɜr θaɪt /

noun

Mineralogy.

a variety of feldspar containing irregular bands of albite in microcline.

Other Word Forms

perthitic

adjective
perthitically

adverb

Etymology

Origin of perthite

1832; named after Perth, Ontario, Canada; see -ite ¹

Example Sentences

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See Examples For:

perthite

Potassium feldspar does not exhibit twinning or striations but may show linear features called exsolution lamellae, also known as perthitic lineation or simply perthite.

From Textbooks ● Jan. 1, 2017

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023