Edouard Bastarache on wed 25 jul 01
Hello,
I made a mistake in writing the second version of the molecular formula.
The right one is Cr2FeO4 instead of Cr2Fe2O4.
I probably had ferric oxid formula in mind when I typed the mistake.
That is what happens when you watch TV at the same time.
Later,
Edouard Bastarache(Goofy Bassy)
Irreductible Quebecois
Sorel-Tracy
Quebec
edouardb@sorel-tracy.qc.ca
http://sorel-tracy.qc.ca/~edouardb/
http://www.absolutearts.com/portfolios/e/edouardb/
----- Original Message -----
From: Edouard Bastarache
To:
Sent: Wednesday, July 25, 2001 1:35 PM
Subject: Re: unusual chemicals
> Hello,
>
> Re: chromite.
>
> ferrous chromite has the following formula, FeO.Cr2O3.
> It can also be written as follows,Cr2Fe2O4; molecular weight, 223.85.
> It is the principal constituent of many chrome ores.
>
>
>
> Later,
>
>
>
> Edouard Bastarache
> Irreductible Quebecois
> Sorel-Tracy
> Quebec
> edouardb@sorel-tracy.qc.ca
> http://sorel-tracy.qc.ca/~edouardb/
> http://www.absolutearts.com/portfolios/e/edouardb/
>
>
>
> ----- Original Message -----
> From: scott lykens
> To:
> Sent: Wednesday, July 25, 2001 10:02 AM
> Subject: Re: unusual chemicals
>
>
> > >
> > >Pyrite, aka fools gold. we use to go nuts for the stuff when i was a
> child
> > >growing up in rural PA. It was amish country about an hour from
> > >philadelphia and we use to take it on field trips to sell to city
> children.
> >
> > you might also call it FeS2 47% Fe, 33% S. Its a source for ferrous
> > sulfate and its major use in ceramic colorants is amber glass. its also
> > used as filler in resin bonded abrasives and brake linings.
> >
> > Chromite is where chromium oxide is sourced from. Some folks find it
> useful
> > as a refractory. Others might use it like a colorant and i believe its
the
> > color source for green glass bottle. I would assume that its granular
> > nature tends to produce spotting if used in a glazes
> > but you know what they say about assumption.
> >
> > hope that helps.
> > sct
> > >
> > > > Just had a load of chemicals donated to us, older ones mostly, but
> > > > nothing happens to Nepheline Syenite, Chrome oxide, cobalt, etc.
> Hadn't
> > > > seen Kingman Feldspar for years! There are a few lead based frits,
> > > > vanadium etc. which will have to go to hazardous waste, as we won't
be
> > > > using those. Two of the jars hold materials with which I am
> > > > unfamiliar. One is Pyrites (I suspect this is an iron of some
sort -
> it
> > > > is a blackish powder) and the other is granular Chromite, shiny
black
> > > > grains a little larger than granular rutile. Does anyone have any
> idea
> > > > what these two chemicals might do?
> > > >
> > > > Thanks.....June from B.C.
> > > >
> > > >
> >
>
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____________________________________________________________________________
__
> Send postings to clayart@lsv.ceramics.org
>
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melpots@pclink.com.
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