fergusonite


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fergusonite

[′fər·gə·sə‚nīt]
(mineralogy)
Y2O3·(Nb,Ta)2O5 Brownish-black rare-earth mineral with a tetragonal crystal form; it is isomorphous with formanite.
References in periodicals archive ?
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.
Before entering Mexico Niven had also collected more brookite, perovskite, apatite and idocrase from Magnet Cove, Arkansas, and had acquired more uranothorianite, thorogummite, yttrialite, gado-linite, fergusonite, cyrtolite and allanite from Barringer Hill, Texas.
Uraninite, in association with ferrotantalite, fergusonite, euxenite, samarskite and monazite, is known from the cluster of pegmatite bodies that includes the Mugeba, Bere, Enluma, Maria, Muacotaia and Namagoa pegmatites (DSGM, 1974).
Thomas Allan (1777-1833) proposed that a newly described mineral recently brought back from Greenland by Karl Gieseke (1761-1833) should be named fergusonite in his honor, and Jameson dedicated his System of Mineralogy of 1820 to "Robert Ferguson of Raith in Testimony of his distinguished talents as a mineralogist by his Faithful and Sincere Friend the Author.