Allanite-(Nd)

Overview

(Ca,Nd)(Al2,Fe+2)(Si2O7)(SiO4)(O)(OH)
Fluorescence: none	Mildly Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	3.3-4.2 g/cc
Hardness - Mohs	Allanite-(Nd) - 5.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	brown, black
Streak	grayish brown

Crystal Properties

Property	Value
Crystal structure	monoclinic - prismatic
Cleavage	imperfect
Tenacity	-
Fracture	conchoidal
Luster	vitreous, greasy

Similar Minerals

Dana Number : 58.02.06.04

Class: 58

Group: 58.02

Subgroup: 58.02.06 - epidote

Dana Number	Mineral Name	Formula
58.02.06.01	yoshimuraite	(Ba,Sr)2(Mn,Fe)2(Ti,Fe)(Si2O7)2(PO4,SO4)(OH)
58.02.06.04	allanite-(Nd)	(Ca,Nd)(Al2,Fe+2)(Si2O7)(SiO4)(O)(OH)

Nickel-Strunz Number : 09.BG.05b

Group : 09

Subgroup : BG

Nickel-Strunz Number	Mineral Name	Formula
09.BG.05b	allanite-(Ce)	(Ce,Ca,Y)2(Al,Fe+3)3(SiO4)3(OH)
09.BG.05b	allanite-(Nd)	(Ca,Nd)(Al2,Fe+2)(Si2O7)(SiO4)(O)(OH)
09.BG.05b	åskagenite-(Nd)	Mn+2NdAl2Fe+3(Si2O7)(SiO4)O2
09.BG.05b	ferriallanite-(La)	(Ca,La)(Fe+3AlFe+2)(Si2O7)(SiO4)O(OH)

Specimens

Localities

Uses