Coutinhoite

Overview

ThxBa1-2x(UO2)2(Si5O13)·3(H2O)
Fluorescence: none	Very Strongly Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	3.94 g/cc
Hardness - Mohs	Coutinhoite - 1.5  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	yellow
Streak	yellow

Crystal Properties

Property	Value
Crystal structure	orthorhombic - dipyramidal
Cleavage	-
Tenacity	-
Fracture	-
Luster	waxy

Similar Minerals

Dana Number : 53.03.02.04

Class: 53

Group: 53.03

Subgroup: 53.03.02 - weeksite

Dana Number	Mineral Name	Formula
53.03.02.01	weeksite	K2(UO2)2Si6O15·4(H2O)
53.03.02.02	haiweeite	Ca((UO2)2Si5O12(OH)2)·3(H2O)
53.03.02.04	coutinhoite	ThxBa1-2x(UO2)2(Si5O13)·3(H2O)

Nickel-Strunz Number : 09.AK.30

Group : 09

Subgroup : AK

Nickel-Strunz Number	Mineral Name	Formula
09.AK.30	coutinhoite	ThxBa1-2x(UO2)2(Si5O13)·3(H2O)
09.AK.30	weeksite	K2(UO2)2Si6O15·4(H2O)

Specimens

Localities

Uses