Erionite-(K)

Overview

(K2,Ca,Na2)2(Al4Si14O36)·15(H2O)
Fluorescence: none	Barely Detectable Radiation	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.09-2.13 g/cc
Hardness - Mohs	Erionite-(K) - 3.5-4.0  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	white, gray, green, orange
Streak	white

Crystal Properties

Property	Value
Crystal structure	hexagonal - dihexagonal dipyramidal
Cleavage	distinct
Tenacity	brittle
Fracture	splintery
Luster	vitreous, silky

Similar Minerals

Dana Number : 77.01.02.05a

Class: 77

Group: 77.01

Subgroup: 77.01.02 - chabazite

Dana Number	Mineral Name	Formula
77.01.02.01	chabazite	(Ca0.5,Na,K)4(Al4Si8O24)·12(H2O)
77.01.02.01	chabazite-(Ca)	(Ca0.5,Na,K)4(Al4Si8O24)·12(H2O)
77.01.02.01a	chabazite-(Na)	(Na2,K2,Ca,Mg)(Al2Si4O12)·6(H2O)
77.01.02.01b	chabazite-(K)	(K2,Ca,Na2,Mg)(Al2Si4O12)·6(H2O)
77.01.02.03	willhendersonite	KCaAl3Si3O12·5(H2O)
77.01.02.04	offretite	(K2,Ca,Mg)2.5Al5Si13O36·15(H2O)
77.01.02.05	erionite-(Na)	(Na2,K2,Ca)2(Al4Si14O36)·15(H2O)
77.01.02.05a	erionite-(K)	(K2,Ca,Na2)2(Al4Si14O36)·15(H2O)
77.01.02.06	gmelinite-(Na)	(Na2,Ca)Al2Si4O12·6(H2O)
77.01.02.06a	gmelinite-(Ca)	(Ca,Na2)Al2Si4O12·6(H2O)
77.01.02.07	faujasite-(Na)	(Na2,Ca,Mg)3.5(Al7Si17O48)·32(H2O)

Nickel-Strunz Number : 09.GD.20

Group : 09

Subgroup : GD

Nickel-Strunz Number	Mineral Name	Formula
09.GD.20	erionite-(K)	(K2,Ca,Na2)2(Al4Si14O36)·15(H2O)
09.GD.20	erionite-(Na)	(Na2,K2,Ca)2(Al4Si14O36)·15(H2O)

Specimens

Localities

Uses