The Origins of English Words: Die Gesellschaft hat ihren Sitz in Deutschland. Authority control GND:

Samarium and its sesquioxide are paramagnetic at room temperature. They are remarkable by converting from semiconducting to metallic state at room temperature upon application of pressure.

Reactive nonmetal. The metallic appearance of a sample can be preserved by sealing it under an inert gas such as argon. All the remaining radioisotopes have half-lives that are less than 2 days, and the majority of these have half-lives that are less than 48 seconds.