Paravauxite

Paravauxite Siglo XX Mine, Llallagua, Bolivia Small Cabinet, 8.3 x 5.7 x 3.0 cm © irocks

Chemical Formula: Fe2+Al2(PO4)2(OH)2·8H2O
Locality: Llallagua, Potosi, Bolivia.
Name Origin: Named for the chemical similarity to vauxite. Polymorph of metavauxite.

History

Discovery date : 1922
Town of Origin: LLALLAGUA, POTOSI
Country of Origin : BOLIVIE

Optical properties

Optical and misc. Properties : Transparent  –   Translucide  –   Fragile, cassant
Refractive Index : from 1,55 to 1,57
Axial angle 2V: 72°

Physical properties

Hardness: 3,00
Density : 2,36
Color : colorless; greenish white
Luster : vitreous; nacreous
Streak: white
Break: conchoidal
Cleavage : Yes

Photos :

Paravauxite 10.0×8.1×2.9 cm Siglo XX Mine Llallagua, Bustillo Province Bolivia Copyright © David K. Joyce Minerals
Paravauxite Siglo Veinte Mine, Llallagua, Bolivia Thumbnail, 1.6 x 1.1 x 1.1 cm © irocks
Paravauxite Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine), Llallagua, Potosí Department, Bolivia (TYPE LOCALITY) Cabinet, 23.7 x 18.0 x 5.0 cm © irocks
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