| Other particles containing yttria and some lanthanides are phosphors that be processed to form light-emitting devices. |
| In 1794 Finnish chemist Johan Gadolin isolated yttria, a new earth or metallic oxide, from a mineral found at Ytterby, Sweden. |
| This reaction distinguishes the members of the yttria group from most of the other earths. |
| A rare metal found by Prof. Mosander, associated with erbium and yttrium in ordinary yttria. |
| In 1797 Ekeberg showed that gadolinite contained another rare earth, which was given the name yttria. |
| The electrolyte is an ion-conducting oxide such as zirconia treated with yttria. |
