Nepheline

Overview

(Na,K)AlSiO4
Fluorescence: none	Barely Detectable Radiation	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.55-2.65 g/cc
Hardness - Mohs	Nepheline - 6  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	white, gray, brown
Streak	white

Crystal Properties

Property	Value
Crystal structure	hexagonal - pyramidal
Cleavage	poor
Tenacity	-
Fracture	sub-conchoidal
Luster	vitreous, greasy

Similar Minerals

Dana Number : 76.02.01.02

Class: 76

Group: 76.02

Subgroup: 76.02.01 - nepheline

Dana Number	Mineral Name	Formula
76.02.01.02	nepheline	(Na,K)AlSiO4

Nickel-Strunz Number : 09.FA.05

Group : 09

Subgroup : FA

Nickel-Strunz Number	Mineral Name	Formula
09.FA.05	nepheline	(Na,K)AlSiO4

Specimens

Localities

Uses