Steacyite

Overview

K1-x(Ca,Na)2ThSi8O20

Fluorescence: noneRadioactiveRadioactiveRadioactiveRadioactive
Strongly Radioactive		Magnetic: no
Description
Physical Properties
PropertyValue

Density

2.95 g/cc

Hardness - Mohs

Steacyite - 5 10Diamond
9Carborundum
8Topaz
7Quartz
6Orthoclase
5Apatite
4Fluorite
3Calcite
2Gypsum
1Talc

Color

brown, green

Streak

white

Crystal Properties
PropertyValue

Crystal structure

tetragonal - ditetragonal dipyramidal

Cleavage

none

Tenacity

brittle

Fracture

brittle

Luster

vitreous, dull

Similar Minerals

Dana Number : 63.01.01.01


Class: 63


Group: 63.01


Subgroup: 63.01.01 - steacyite


Dana NumberMineral NameFormula
63.01.01.01steacyiteK1-x(Ca,Na)2ThSi8O20
63.01.01.03turkestaniteTh(Ca,Na)2K(Si8O20)·n(H2O)

Nickel-Strunz Number : 09.CH.10


Group : 09


Subgroup : CH


Nickel-Strunz NumberMineral NameFormula
09.CH.10steacyiteK1-x(Ca,Na)2ThSi8O20
09.CH.10turkestaniteTh(Ca,Na)2K(Si8O20)·n(H2O)
Specimens
Localities
Uses