Maybe the OP meant Dysprosium(III) oxide?

According to Wikipedia:
React with fluorine, react floride with calcium, in a helium atmosphere melt in a tantalium crucible and separate metal from slag.

It is possible that my terms are incorrect, I will do some further reading and repost.

thank you

PS
I guess that I should also mention what I am attempting to do, perhaps it will make it more clear . I am really interested in creating Deuterium in a gas state, so that it can be injected into a vacuum vessel, replacing all O2.

It would be easier to just buy a lecture bottle of the gas, but I found a website that was advertising Deuterium Oxide in powder form for a very inexpensive price. In the notes it said that it could be converted to Deuterium gas easily. The powder was stored in a small plastic container and did not appear to need refrigeration.

I may be the victim of an internet scam or joke, thus my misunderstanding of the nature of the substance. I will do further reading and try to rephrase my question.

Again,
Thank you

Deuterium oxide is available in bulk at less than $620/liter ($560/kg).
https://www.cdnisotopes.com/us/prodinfo/D-175.php

Fisher Scientific may be able to sell small amounts of it to you.
Deuterium oxide: 10 ml (about 11g or about 0.55 moles) USD 28.70
Deuterium oxide: 100 ml (about 110g or about 5.5 moles) USD 90.30

Deuterium oxide is about 20% deuterium by weight. Each mole of Deuterium oxide could produce 1 mole of Deuterium molecules. So 10 ml could produce 0.55 moles of gas which is about 13 liters of gas at 1 atmosphere of pressure and at 25 °C .

But 10 ml is too little little working fluid for most electrolysis rigs. You should practice your lab technique with water.

Or you might be able to order Deuterium gas from Spectra Gas or some such.

http://www.spectragases.com/content/upload..._Gas_121206.pdf

Hydrogen is an exception in that its isotopes have different chemical properties. Not hugely different, but for instance the melting temperature of light and heavy water differs by a few °C. Not that electron orbital differ, but heavier nuclei vibrate less, and this is favourable to stronger electronic bonds, especially hydrogen bonds.

Anyway, D2O is liquid at room temperature. A crystalline form must at least contain something more.

Separating D2 from D2O is done the usual way for hydrogen, yes.

Buying D2O or D2 isn't necessarily easy, because heavy water allows to built nuclear reactors that burn natural uranium and produce plutonium, so it's a way to bombs proliferation that's difficult to control. India, Pakistan made their bombs from Candu reactors. Expect police or customs to ask you what you plan to do with the stuff, as they do for maraging steel for instance.