Ephesite

Overview

NaLiAl2(Al2Si2)O10(OH)2
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.984 g/cc
Hardness - Mohs	Ephesite - 3.5-4.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	pink, gray, pale green
Streak	white

Crystal Properties

Property	Value
Crystal structure	monoclinic - prismatic
Cleavage	perfect
Tenacity	brittle
Fracture	brittle
Luster	vitreous, pearly

Similar Minerals

Dana Number : 71.02.02b.16

Class: 71

Group: 71.02

Subgroup: 71.02.02b - mica

Dana Number	Mineral Name	Formula
71.02.02b.01	phlogopite	KMg3(Si3Al)O10(F,OH)2
71.02.02b.01c	fluorophlogopite	KMg3(AlSi3)O10F2
71.02.02b.03	annite	KFe+23AlSi3O10(OH,F)2
71.02.02b.04	tetraferriannite	K(Fe+2,Mg)3(Fe+3,Al)Si3O10(OH)2
71.02.02b.05a	eastonite	KMg2Al(Al2Si2O10)(OH)2
71.02.02b.07	lepidolite	K(Li,Al)3(Si,Al)4O10(F,OH)2
71.02.02b.08	polylithionite	KLi2AlSi4O10(F,OH)2
71.02.02b.10	zinnwaldite	KLiFe+2Al(AlSi3)O10(F,OH)2
71.02.02b.11	norrishite	K(Mn+32Li)Si4O10(O)2
71.02.02b.16	ephesite	NaLiAl2(Al2Si2)O10(OH)2

Nickel-Strunz Number : 09.EC.20

Group : 09

Subgroup : EC

Nickel-Strunz Number	Mineral Name	Formula
09.EC.20	annite	KFe+23AlSi3O10(OH,F)2
09.EC.20	eastonite	KMg2Al(Al2Si2O10)(OH)2
09.EC.20	ephesite	NaLiAl2(Al2Si2)O10(OH)2
09.EC.20	fluorophlogopite	KMg3(AlSi3)O10F2
09.EC.20	lepidolite	K(Li,Al)3(Si,Al)4O10(F,OH)2
09.EC.20	norrishite	K(Mn+32Li)Si4O10(O)2
09.EC.20	oxyphlogopite	K(Mg,Ti,Fe)3((Si,Al)4O10)(O,F)2
09.EC.20	phlogopite	KMg3(Si3Al)O10(F,OH)2
09.EC.20	polylithionite	KLi2AlSi4O10(F,OH)2
09.EC.20	tetraferriannite	K(Fe+2,Mg)3(Fe+3,Al)Si3O10(OH)2
09.EC.20	zinnwaldite	KLiFe+2Al(AlSi3)O10(F,OH)2

Specimens

Localities

Uses