Stillwellite-(Ce)

Overview

(Ce,La,Ca)BSiO5
Fluorescence: none	Mildly Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	4.57-4.6 g/cc
Hardness - Mohs	Stillwellite-(Ce) - 6.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	brown, pink
Streak	white

Crystal Properties

Property	Value
Crystal structure	trigonal - pyramidal
Cleavage	imperfect
Tenacity	brittle
Fracture	conchoidal
Luster	resinous

Similar Minerals

Dana Number : 54.02.03.02

Class: 54

Group: 54.02

Subgroup: 54.02.03 - cappellanite-stillwellite

Dana Number	Mineral Name	Formula
54.02.03.02	stillwellite-(Ce)	(Ce,La,Ca)BSiO5

Nickel-Strunz Number : 09.AJ.25

Group : 09

Subgroup : AJ

Nickel-Strunz Number	Mineral Name	Formula
09.AJ.25	stillwellite-(Ce)	(Ce,La,Ca)BSiO5

Specimens

Localities

Uses