Ianthinite

minerals

schoepite

uraninite

dewindtite

Images
Formula: U4+2(UO2)4O6(OH)4.9H2O
Oxide containing uranium
Specific gravity: 5.16
Hardness: 2 to 3
Streak: Brown, violet
Colour: Violet-black, dark violet in transmitted light
RADIOACTIVE
Environments

Sedimentary environments

Ianthinite is a rare secondary mineral in the unoxidised portions of sedimentary uranium deposits. Associated minerals include uraninite, schoepite, becquerelite, kasolite, parsonsite, dewindtite and fourmarierite (HOM).

Localities

The type locality is the Shinkolobwe mine, Shinkolobwe, Kambove District, Haut-Katanga, DR Congo.

Alteration

Ianthinite is not very stable under ambient conditions; it slowly dehydrates to schoepite and further members of the schoepite group (Mindat).

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