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Samarium is a bright silvery metal belonging to the Lanthanides. This element is reasonably stable in air up to temperatures of 150°C when it ignites spontaneously.
In its elemental form, samarium is used in the nuclear industry as a neutron absorber. It is also an important material in the production of permanent magnets due to its high resistance to demagnetization.
Another useful samarium compound is its oxide that has excellent light filtering properties.