However, I've found out one interesting thing-it contains thorium.

Monazite also contains thorium and yttrium, which complicates handling because thorium and its decay products are radioactive.

Historadiography has also been used to visualize staining of tissue, such as spinal cord samples with thorotrast, which contains thorium that is opaque to X-rays.

Monazite contains 2.5% thorium, allanite has 0.1 to 2% thorium and zircon can have up to 0.4% thorium.

The one-fluid design includes a large reactor vessel filled with fluoride salt containing thorium and uranium.

The Earth's crust contains about three to four times as much thorium as U-238 (thorium is about as abundant as lead).

Uranium mines also create radioactive waste in the form of tailings, which contain uranium, thorium, radium, and polonium.

Sea waves pound coastal mountains rich in monazite, a phosphate of rare earth metals containing uranium and thorium.

Mag-Thor is the common name for a range of magnesium alloys containing thorium that are used in aerospace engineering.

Coal also contains low levels of uranium, thorium, and other naturally occurring radioactive isotopes whose release into the environment may lead to radioactive contamination.