nepheline

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See also: néphéline

English[edit]

Nepheline
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Etymology[edit]

From Ancient Greek νεφέλη (nephélē, cloud), because crystals become cloudy when exposed to acid, +‎ -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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Further reading[edit]

  • Nepheline” in David Barthelmy, Webmineral Mineralogy Database[1], 1997–.
  • nepheline mindat.org[2], Hudson Institute of Mineralogy, accessed 29 August 2016