Faustite and Hollandite Physical Properties

Faustite

Hollandite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.95.05

1 7.18

1.5 Fracture

Conchoidal, ConchoidalAnthony et al, Conchoidal, Brittle, Conchoidal

Brittle, Metallic

1.6 Cleavage

{???} Indistinct

Distinct / Good, Prismatic

1.7 Mohs Hardness

4.54-6

2 10

1.8 Chemical Composition

(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Ba(Mn++++,Mn++)8O16

Faustite and Hollandite Chemical Formula

While comparing Faustite and Hollandite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Faustite and Hollandite chemical formula.

Chemical formula of Faustite- (Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16

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Faustite and Hollandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Faustite and Hollandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Faustite and Hollandite Optical Properties during the identification of gemstone. Specific gravity of Faustite is 5.05 whereas that of Hollandite is 5.05.