File:Nepheline3.jpg · Wikimedia Commons · See Wikimedia Commons
nepheline
Sign in to saveAlso 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
- Named after
- cloud
- Image
- Nepheline-Schorlomite-250211.jpg
Show 9 more facts
- streak color
- white
- described by source
- Encyclopædia Britannica 11th edition
- 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)
- type locality (geology)
- Mount Somma
- Strunz 8th edition (series ID, updated)
- VIII/F.01
- IMA Mineral Symbol
- Nph
Sources (2)
via Wikidata · CC0
~5 min read
Encyclopedic overview
6 sectionsContents
- Description and properties
- Structure and composition
- Occurrence
- Uses
- References
- External links
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.
== Description and properties == thumb|left|Grayish-white nepheline crystals with dark schorlomite from Bou-Agrao Mount, Tamazeght complex, High Atlas Mountains, Morocco. Size: |204x204px
Excerpted from Wikipedia’s “nepheline” article, available under the CC BY-SA 4.0 licence.