perthite
noun
a variety of feldspar containing irregular bands of albite in microcline.
perthitic
-
a word derived from
perthite.
Example Sentences
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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
