Name:

autunite

A photo of the mineral autunite

Class:

Phosphates/Arsenates/Vanadates

Chemistry:

Ca(UO2)2(PO4)2 10-12 H2O

Color(s):

lemon-sulfur yellow, yellow-green, green

Hardness:

2-2.5

SpecGrav:

3.1-3.2

Fracture:

Cleavage:

perfect, one direction

Crystal:

tetragonal; usually tabular xtls. often micaceous

Envronment:

secondary uranium mineral, pegmatites and hypothermal veins.

Association:

torbernite, uranocicrcite, flourite, barite, quartz

Locals:

Germany / Eng;amd / France / Zaire, Africa / Grafton, Colorado, NH, NC, SD, USA /

Misc:

The name is derived from a locally ... Autun, Saone-et-Loire, France.

Photos
& Locals:

1.) Malacacheta, Minas Gerais, Brazil
2.) Malacacheta, Minas Gerais, Brazil

3.) Malacacheta, Minas Gerais, Brazil

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