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"Rare-earth" means lanthanides plus scandium and yttrium. But scandium and yttrium are not used in magnets, so they would confuse people less by saying "lanthan
by moloch-hai 4y ago
"Rare-earth" means lanthanides plus scandium and yttrium. But scandium and yttrium are not used in magnets, so they would confuse people less by saying "lanthanide magnet" instead of "rare-earth magnet".
- culi 4y agoThere's actually 17 rare earth minerals. The Wikipedia page for it helpfully lists out common uses for each of them: https://en.wikipedia.org/wiki/Rare-earth_element https://en.wikipedia.org/wiki/Rare-earth_element
- kragen 4y ago17 elements, but many more minerals in fact, almost all minerals contain trace amounts of rare-earth elements (and non-trace amounts are very rare)
- moloch-hai 4y ago15 of the 17 "rare-earth" elements are lanthanides. The remaining scandium and yttrium are not lanthanides.
- culi 4y agoah makes sense, thanks