nepheline

Also known as nephelite

Nepheline (), also called nephelite, is a rock-forming mineral in the feldspathoid groupa silica-undersaturated aluminosilicate (Na3KAl4Si4O16) that occurs in intrusive and volcanic rocks with low silica, and in their associated pegmatites. It is used in glass and ceramic manufacturing and other industries, and has been investigated as an ore of aluminium.

Key facts

Mineral.name: Nepheline
Mineral.category: Tectosilicate minerals
Mineral.group: Feldspathoid group
Mineral.image: Nepheline3.jpg
Mineral.IMAsymbol: Nph
Mineral.molweight: 146.08 g/mol
Mineral.strunz: 9.FA.05
Mineral.system: Hexagonal
Mineral.class: Pyramidal (6) H–M symbol: (6)
Mineral.symmetry: P63
Mineral.color: White, gray, brown, brownish gray, or reddish white
Mineral.habit: Massive granular to prismatic
Mineral.twinning: On [1010], [3365], and [1122]
Mineral.cleavage: [1010] Poor
Mineral.fracture: Subconchoidal
Mineral.mohs: 6
Mineral.luster: Vitreous to greasy
Mineral.refractive: nω = 1.529–1.546 nε = 1.526–1.542

via Wikipedia infobox

Wikidata facts

Image: Nepheline-Schorlomite-250211.jpg

Show 6 more facts

Commons category: Nepheline
Nickel-Strunz 9th edition (updated 2009): 9.FA.05
Nickel-Strunz '10th ed', review of (9th ed/ 2009 update): 9.FA.05
chemical formula: Na₃K(Al₄Si₄O₁₆)
Strunz 8th edition (series ID, updated): VIII/F.01
IMA Mineral Symbol: Nph

Sources (2)

via Wikidata · CC0

~5 min read

Article

6 sections

Contents

Description and properties
Structure and composition
Occurrence
Uses
References
External links

== Description and properties == thumb|left|Grayish-white nepheline crystals with dark schorlomite from Bou-Agrao Mount, Tamazeght complex, High Atlas Mountains, Morocco. Size: |204x204px