Neodymium(III) oxide

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What Wikipedia says

Neodymium(III) oxide or neodymium sesquioxide is the chemical compound composed of neodymium and oxygen with the formula Nd2O3. It forms very light grayish-blue hexagonal crystals. The rare-earth mixture didymium, previously believed to be an element, partially consists of neodymium(III) oxide.

Excerpt from the Wikipedia article “Neodymium(III) oxide”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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