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Gold/Mining/Energy : Gold Price Monitor

GDXJ 106.68

-0.3%

Dec 5 4:00 PM EST

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To: E. Charters who wrote (82868)	3/4/2002 2:17:56 PM
From: Richnorth	Read Replies (1) of 116798

Millosevichite is (AlFe)2(SO4)3 Mikasaite is also (FeAl)2(SO4)3 Both above minerals use iron III and are not hydrated. The formulae are correct. They appear charge imbalanced I will admit. -------------------------- The charges are balanced IF 1. Al has a 0 charge (that is, it is in metal form which is unlikely in nature) and the Fe ion has a 3+ charge; OR 2. Fe is neutral as a metal (unlikely) while each Al functions as Al3+ (3+ is the charge carried by an Al ion). I tend to suspect that the ancient Incas/Quechas subjected whichever alum they mined to a treatment that ensured the Fe was converted to Fe3+ before they used it to make their equivalent of "aqua regia". In other words there was an intermediate step which was not reported. <ggg>

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