![]() The samarium 3+ ion may be useful to make warm-white light-emitting diodes, although low quantum efficiency is an issue. Samarium hexaboride, SmB6, is a topological insulator that may find use in quantum computers. ![]() Nanocrystalline BaFCl:Sm 3+ is a highly sensitive x-ray storage phosphor, which may have applications in dosimetry and medical imaging. Samarium may be used as an absorber in nuclear reactors. It is used to make samarium-cobalt permanent magnets, samarium X-ray lasers, glass that absorbs infrared light, a catalyst for ethanol production, in the manufacture of carbon lights, and as part of a pain treatment regimen for bone cancer. There are numerous uses for this element.A total of 30 isotopes have been discovered or prepared, with atomic masses ranging from 131 to 160. Three of these isotopes are unstable but have long half-lives. Natural samarium consists of a mixture of 7 isotopes.Further heating leads to a transition to a body-centered cubic (bcc) phase. ![]() Heating changes the crystal structure to hexagonal close-packed (hcp).
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