nepheline

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English[edit]

Nepheline
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Etymology[edit]

From Ancient Greek νεφέλη ‎(nephélē, cloud) +‎ -ine.

Noun[edit]

nepheline ‎(countable and uncountable, plural nephelines)

  1. (mineralogy) A feldspathoid mineral of silica-poor igneous, plutonic and volcanic rocks. Chemically, nepheline is a plagioclase feldspar with insufficient silica to satisfy the chemical bonds. Because of the unfilled bonds, nepheline weathers rapidly and can only be seen as inclusions in freshly broken rock.

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