uranous

In the past Hamr was very popular for spa, but in the second part of the 20th century there were uranous mines.

Uranous compounds are usually unstable; they revert to the oxidised form on exposure to air.

Uranium in its tetravalent (uranous) state is very important in different technological processes.

Preliminary chemical analysis indicated that the uranous silicate exhibited hydroxyl substitution.

Minerals containing the uranous ion are more subdued in colour, typically brown or black, and occur in reducing environments.

Common uranous minerals include: uraninite; pitchblende (a crystalline variant of uraninite); and coffinite (Smith,Hutchinson and Blackwell, 1984)