yttria

/i-tree-uh/US // ˈɪ tri ə //UK // (ˈɪtrɪə) //

钇,镱珥嚓铎栩栩如生

Definitions

n.名词 noun

1
Chemistry.
- : a white, water-insoluble powder, Y2O3, used chiefly in incandescent gas and acetylene mantles.

This reaction distinguishes the members of the yttria group from most of the other earths.
In 1797 Ekeberg showed that gadolinite contained another rare earth, which was given the name yttria.
Yttria is an exceedingly complex mixture, which has been decomposed, yielding as an intermediate product terbia.
These crude earths, yttria and ceria, have supplied most if not all of the “rare earth” metals.
Here is an egg-shaped bulb, shown in Fig 19, containing some pure yttria and a few rough rubies.