Uncommon earth factors are hard and fast of seventeen chemical elements inside the periodic table, particularly the fifteen lanthanides plus scandium and yttrium. Scandium and yttrium are considered uncommon earth factors in view that they have a tendency to occur within the identical ore deposits because the lanthanides and showcase similar chemical homes. while named rare earths, they are in truth not that uncommon and are quite plentiful inside the Earth's crust. what's unusual is to discover them in quantities widespread enough to help monetary mineral improvement.
Rare Earth Elements (REE)'s consist of 16 elements, being the 15 lanthanide-series elements plus the metal yttrium. Rare Earth Elements (REE) are becoming increasingly important in electronic devices used in defense, alternative energy and communications industries. When alloyed with other metals, the rare-earths can provide enhanced magnetic, strength and high temperature and other properties.
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