Samarium has a bright silver luster and is reasonably stable in air. Three crystal modifications of the metal exist, with transformations at 734 and 922°C. The metal ignites in air at about 150°C.
Melting point: 1074 °C Boiling point: 1794 °C
A foil is a thin sheet of pure metal. Given its fragile nature, some foils have protective coatings.