Autunite

Autunite is a radioactive orthorhombic mineral which results from the hydrothermal alteration of uranium minerals. Used as a uranium ore, it was first discovered in France in 1852.

Type

Mineral

Mineral Classification

Autunite

Chemical Formula

2[Ca(UO2)2(PO4)2·10-12H2O]

Streak

Pale Yellow

Mohs Hardness

2-2.5

Crystal System

Tetragonal, Orthorhombic

Color

Yellow, greenish-yellow, pale green; dark green, greenish black

Luster

Sub-vitreous, resinous, waxy, pearly

Fracture

Micaceous

Description

Autunite is a radioactive orthorhombic mineral which results from the hydrothermal alteration of uranium minerals. Used as a uranium ore, it was first discovered in France in 1852.

Uses

Autunite is used as a uranium ore. Uranium is used in nuclear fission to generate electricity. It may also be used as a cathode in photoelectric tubes. It was once used for making glazes in the ceramics industry due to its beautiful red color with yellow tinge.