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- Newsgroups: sci.space
- Path: sparky!uunet!wupost!udel!rochester!dietz
- From: dietz@cs.rochester.edu (Paul Dietz)
- Subject: Platinum (was Re: Justification for the Space Program)
- Message-ID: <1992Dec25.010524.23493@cs.rochester.edu>
- Organization: University of Rochester
- References: <1992Dec19.143517.23184@cs.rochester.edu> <20DEC199222321742@judy.uh.edu> <1992Dec24.065127.29209@ke4zv.uucp>
- Distribution: usa, world
- Date: Fri, 25 Dec 1992 01:05:24 GMT
- Lines: 24
-
- Gary mistated the concentration of platinum at Sudbury. It's about 1
- ppm, and would not be worth mining were it not for the copper and
- nickel. The platinum-rich part of the layered ultramafics in South
- Africa hits several ounces per ton. Placer deposits can be much richer
- but are limited. It would be interesting to know the platinum
- concentration in tropical nickel laterite deposits.
-
- Detecting platinum is actually nontrivial, as, on a small scale, its
- concentration in rocks can be rather nonuniform. Just picking up a
- rock and sending it to the lab for analysis won't do; you must grind
- up tons to get a decent sample.
-
- Automotive catalytic converters contain a bit less than 3 grams of
- PGEs, mostly platinum, with some palladium and rhodium.
-
- The cost of platinum is currently somewhere around $350/oz, not $500.
-
- If we ever go to a full-nuclear economy, a significant source of the
- PGEs ruthenium, rhodium and palladium will be from reprocessed nuclear
- waste. A 1 GWe reactor operated for a year should produce on the
- order of tens of kilograms of each of these, particularly ruthenium.
-
- Paul F. Dietz
- dietz@cs.rochester.edu
-