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The name platinum is known to practically everyone but few have actually seen it It is well known to be rare and expensive Chemistry texts give limited space to

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iridium ore refine process To extract the platinum group metals from the ore and to refine them to the very high and this paper highlights some of the chemical

How Is Gold Purified eHow

How Is Gold Purified Gold is purified through a process of high temperature heating or chemical exposure depending on the purity of the mined gold

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Iridium Wikipedia the free encyclopedia Iridium is a chemical element with symbol Ir and atomic number 77 vanadium ore crusheriridium ore refine process