A rare mineral, likely a variant or historical name for a mineral containing rare earth elements or other metallic compounds.
Derived from 'Ferguson' or a similar personal name with the mineral suffix '-ite,' following mineralogical naming conventions where minerals are named after discoverers or locations.
The overlap between 'fergusite' and 'fergusonite' shows how mineral names evolved—scientists would sometimes use slightly different names before the International Mineralogical Association standardized terminology.
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