gadolinite


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gadolinite

[′gad·əl·ə‚nīt]
(mineralogy)
Be2FeY2Si2O10 A black, greenish-black, or brown rare-earth mineral; hardness is 6.5-7 on Mohs scale, and specific gravity is 4-4.5.
References in periodicals archive ?
To my great surprise, the first pick I put in the ground brought to the surface a huge crystal of gadolinite, and for a short time I enjoyed the most pleasant excitement, bringing out crystal after crystal from the decomposed feldspar, until the pile must have weighed 30 pounds.
This good news spurred further searching which turned up large quantities of fluorite, muscovite, magnetite, menaccinite, molybdenite, graphite, columbite, allanite, several more pounds of fergusonite and ultimately over 200 pounds of gadolinite.
1984) A refinement of the crystal structure of gadolinite.
1974) Mineralogie de la France (allanite, bastnasite, gadolinite, monazite, parisite, synchisite).
1973) Gadolinite from Hundholmen, Tysfjord, North Norway.