How do you get gadolinium oxide

How do you get gadolinium oxide? For gadolinium, maybe a lot of people don't know it very well, and here's the introduction to it:

Gadolinium oxide; The samadinium mixed rare earth solution is made from the purification steps of living alone stone or mixed rare earth ore. Using oxalic acid to precipitate gadolinium, it was separated, dried, burned and made from gadolinium oxide.

Used as yttrium aluminum and yig incorporation agent, medical apparatus and instruments of sensitized fluorescent materials, nuclear reactor control materials, the production system of raw materials, metal gadolinium magnetic bubble material and optical prism additives, etc.