Monazite is an important ore for thorium, lanthanum, and cerium. It is often found in placer deposits. ... Monazite is radioactive due to the presence of thorium and, less commonly, uranium.

Does monazite contain uranium?

According to Atomic Minerals Directorate, monazite contains 0.2–0.4 per cent uranium in the form of uranium oxide and 4.5–9.5 per cent thorium as thorium oxide, depending on the region of origin or occurrence.

Which mineral is found in monazite?

The thorium mineral sand is contained in the monazite sand.