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Gold/Mining/Energy : Gold Price Monitor -- Ignore unavailable to you. Want to Upgrade?

To: Richnorth who wrote (82871)	3/4/2002 4:18:48 PM
From: E. Charters	Respond to of 116797

These charges are balanced in minerals as the amount of Al is 3 times the amount of Fe in the empirical formula. So it is (Al[1.5]Fe[0.5])2(SO4)3. Minerals can do that. Like the formula for pyrrhotite. Fe(1-x)S where x can be anything from 0 to 0.2. It is often given as Fe[0.83]S There is another possibility that the natural salt that occurs on the Nazca plain is an alum or double salt. This would be FeSO4.Al2(SO4)3.24H2O Normally the first sulphate would be a monovalent metal with 2 atoms bonded to one sulphate, as in K2SO4, but I am suggesting with Fe 2+ it has the same balance. Ferric Aluminum sulphate is a trade name for a type aluminum sulphate, which has a percentage ferric iron. Whereas aluminum oxide may be 15%, ferric iron is usually 0.5% or therabouts. This reagant is used in water treatment and in medicine. There are no steps left out of my description. The process will dissolve gold just as I said and it was as described in SciAm as well, circa 1985-88. You cannot search SciAm on the web very well, so you would have to go to a reference library and search magazine articles with the periodical index of subjects. EC<:-}