different between nepheline vs agpaite

nepheline

English

Etymology

From Ancient Greek ?????? (nephél?, cloud), because crystals become cloudy when exposed to acid, +? -ine.

Noun

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.

Synonyms

  • nephelite

Derived terms

  • nephelinic

Translations

Further reading

  • David Barthelmy (1997–2021) , “Nepheline”, in Webmineral Mineralogy Database
  • “nepheline”, in Mindat.org?[1], Hudson Institute of Mineralogy, 2000–2021.

nepheline From the web:

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agpaite

English

Noun

agpaite (plural agpaites)

  1. (mineralogy) Any of various peralkaline igneous rocks, typically nepheline syenite or phonolite.

Related terms

  • agpaitic

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