thulia Chem.
(ˈθjuːlɪə)
[mod.L., f. thulium after thoria, yttria, etc.]
The sesquioxide of thulium, Tm2O3, a dense white powder.
| 1886 [see fractional a. b]. 1924 J. W. Mellor Comprehensive Treat. Inorg. & Theoret. Chem. V. xxxviii. 698 C. James has described processes for the extraction of thulia from ytterspar (Norwegian xenotime), euxenite, and a Norwegian columbate. 1968 C. A. Hampel Encycl. Chem. Elements 718/2 Should the demand arise, thulia, Tm2O3, could be isolated readily, as one of a number of individual rare earth by-products from the current (1967) commercial production of yttria by ion exchange, at a rate exceeding 1000 pounds per annum. |