Difference between revisions of "Neodymium oxalate"
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Revision as of 06:32, 14 June 2015
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Neodymium oxalate is the chemical compound with the formula Nd2(C2O4)3. At standard temperature and pressure, it is a lavender-colored solid. It is most commonly encountered in the process of purifying neodymium from magnets.
Contents
Properties
Chemical
Neodymium oxalate is inert to most strong acids, including but not limited to concentrated hydrochloric, sulfuric, and nitric acids. In order to turn this into a usable neodymium compound, it must first be calcined to neodymium(III) oxide.
Physical
Neodymium oxalate is a pink solid under natural light, and may acquire a yellow tinge under incandescent light.
Preparation
Neodymium oxalate may be prepared from an acid-dissolved neodymium magnet by the addition of copious amounts of oxalic acid (available as wood bleach). The iron is chelated into a green complex in solution, and the neodymium oxalate remains insoluble.
Projects
Isolation of neodymium from magnets
Handling
Safety
Neodymium is a heavy metal, and as such is toxic if ingested. Standard gloves should be safe to handle neodymium compounds with. Oxalates and oxalic acid are toxic by ingestion, and may lead to kidney stones and other deletirious side effects. The effects are somewhat mitigated by the fact that neodymium oxalate is inert and water-insoluble, however.
Storage
Neodymium oxalate can be stored safely in any container.
Disposal
Neodymium oxalate should be converted into a less toxic form (such as the oxide, a refractory material) before being disposed of.
