Chem. Also ittria. [mod.L. (Ekeberg, 1797), f. the name of Ytterby: see YTTERBITE.] An earth obtained as a white powder from gadolinite and other rare minerals, consisting of sesquioxide of yttrium (Y2O2).
1800. Henry, Epit. Chem. (1809), 105. Yttria, or Ittria.—This earth was discovered in 1794 … in a stone from Ytterby in Sweden.
1873. Fownes’ Chem. (ed. 11), 382. To obtain the earths, yttria and erbia, in the separate state, gadolinite is digested with hydrochloric acid.
