a hard, light-colored, hexagonal mineral, (Na,K)AlSiO, used in making glass, china, etc.; sodium potassium aluminum silicate
sometimes called neph′elite·
Origin of nephelineFrench néphéline from Classical Greek nephel?, cloud (see nebula) + -ine, -ine
A mineral of sodium-aluminum or potassium-aluminum silicate, occurring worldwide in igneous rocks and used in the manufacture of ceramics and enamels.
Origin of nephelineFrom Greek nephelē cloud (because its fragments become cloudy when placed in nitric acid) ; see nebh- in Indo-European roots.
(countable and uncountable, plural nephelines)
- (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.