CENTENNIAL, Colo., Feb. 22, 2021 /PRNewswire/ -- NioCorp Developments Ltd. ("NioCorp" or the "Company") (TSX:NB) (OTCQX:NIOBF) is pleased to announce that it has formally exercised an option-to-purchase agreement on a key land parcel associated with the Company's Elk Creek Superalloy Materials Project. Once the purchase is finalized, NioCorp will own the surface land on which the Project's mineā¦