Definition for YT'TRI-UM

YT'TRI-UM, n.

The metallic base of yttria. It was first obtained pure in 1828, by Woehler. Its texture is scaly, its color grayish-black, and its luster perfectly metallic. Its oxyd, called yttria, was discovered in 1794, by Professor Gadolin, in a mineral found at Ytterby, in Sweden.

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