Boltwoodite

Uranium

Boltwoodite is a hydrated potassium uranyl silicate mineral with formula HK(UO2)(SiO4)·1.5(H2O). It is formed from the oxidation ores. It takes the form of a crust on some sandstones that bear uranium. These crusts tend to be yellowish with a silky or vitreous luster.

Identification

Color of mineral

Yellow

Orange

Mohs scale ( mineral hardness )

3.5

Density ( specific gravity )

1.668

1.695

1.698

Luster ( interacts light )

Silky

Vitreous

Dull

Crystal ( diaphaneity )

Monoclinic