Macdonaldite

Overview

BaCa4(Si16O36(OH2)·10(H2O)
Fluorescence: none	Not Radioactive	Magnetic: no

Description

Physical Properties

Property	Value
Density	2.27 g/cc
Hardness - Mohs	Macdonaldite - 3.5-4  10 Diamond 9 Carborundum 8 Topaz 7 Quartz 6 Orthoclase 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc
Color	colorless, white
Streak	white

Crystal Properties

Property	Value
Crystal structure	orthorhombic - dipyramidal
Cleavage	perfect
Tenacity	-
Fracture	-
Luster	vitreous, silky

Similar Minerals

Dana Number : 72.05.01.03

Class: 72

Group: 72.05

Subgroup: 72.05.01 - rhodesite

Dana Number	Mineral Name	Formula
72.05.01.01	rhodesite	KHCa2Si8O19·5(H2O)
72.05.01.03	macdonaldite	BaCa4(Si16O36(OH2)·10(H2O)
72.05.01.04	delhayelite	(Na,K)10Ca5Al6Si32O80(Cl2,F2,SO4)3·18(H2O)
72.05.01.05	hydrodelhayelite	KCa2AlSi7O17(OH)2·6(H2O)
72.05.01.06	seidite-(Ce)	Na4(Ce,Sr)2(Ti(OH)2(Si8O18))(O,OH,F)4·5(H2O)

Nickel-Strunz Number : 09.EB.05

Group : 09

Subgroup : EB

Nickel-Strunz Number	Mineral Name	Formula
09.EB.05	macdonaldite	BaCa4(Si16O36(OH2)·10(H2O)
09.EB.05	rhodesite	KHCa2Si8O19·5(H2O)

Specimens

Localities

Uses