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Mottramite
Mottramite
☒

Biotite
Biotite
☒



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Mottramite
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Biotite
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
Soluble
-
5.9
Sub-Conchoidal
None observed
3
PbCu(VO4)(OH)
 
Brittle
-
-
2.7-3.3
Uneven, Even
Perfect on the {001}
2.5-3.0
K(Mg,Fe++)3[AlSi3O10(OH,F)2

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Biotite
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Biotite Vs Vlasovite
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Jet lignite
Biotite Vs Jet lignite

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