source
http://www.chinarem.com/eng/english/rd/index2.htm
Process for Purification of Rare Earth Oxide
16 rare earth oxides with high purity (99.999% ~ 99.9999%) can be prepared by extraction, extract-chromatography, oxidation, reduction or ion-exchange.
There are offers for sale, but without prices at grades up to n5.
Can LAMP refine to n3, or 4 or 5 or 6? Genuine Q as I've sen nothing to suggest they have a cost effective process of the plant to do this?
Why would you think the Chinese are not able to produce these purities?
As for complexity, an example from http://chemicalcompounds.allchemie.com/viewitems/lanthanide-compounds/praseodymium-pr-compounds?
'Organic & Inorganic Compounds: Highest Purities to Exacting Specifications '
Praseodymium boride Lanthanide
Praseodymium bromide Lanthanide
Praseodymium chloride Lanthanide
Praseodymium fluoride Lanthanide
Praseodymium hydride Lanthanide
Praseodymium iodide Lanthanide
Praseodymium nitride Lanthanide
Praseodymium oxide Lanthanide
Praseodymium silicide Lanthanide
Praseodymium sulfide Lanthanide
Praseodymium telluride Lanthanide
Praseodymium titanium oxide Lanthanide
bad feeling , page-45
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