Elke Blodgett on fri 20 oct 00
forwarded on behalf of Monona
---------- Forwarded message ----------
Date: Fri, 20 Oct 2000 18:40:21 EDT
From: ACTSNYC@cs.com
Subject: Re: boiling point of manganese dioxide -- (fwd)
>
> Date: Thu, 19 Oct 2000 02:19:25 -0400
> From: Jon Singer
> Reply-To: Ceramic Arts Discussion List
> To: CLAYART@LSV.CERAMICS.ORG
> Subject: Re: boiling point of manganese dioxide --
>
>SNIP
> Gavin or Monona (or anyone else), do you have a source for good info on
this? <
The boiling points of the various manganese compounds are irrelevant. If
the metal boils, it forms a vapor which immediately oxidizes to the fume
(MnO2). That's what happens in welding. The compounds and minerals are only
going to change at high temperatures to other compounds.
My guess is that any gas of this stuff, if it exists, would be so reactive
that it would be something else in a nanosecond or so.
You have enough to worry about with the dusts of the various compounds and
the manganese oxide fume.
Or, you can grind up manganese metal fine, add a spark, and watch it explode.
That's always fun.
Monona
Earl Brunner on fri 20 oct 00
Manganese will do that too? When I was a scout leader we
carried a small block of magnesium metal with a flint
striker imbedded in one side for an emergency fire starter
in our backpacks. Will both compounds do this?
Elke Blodgett wrote:
>
> forwarded on behalf of Monona
>
> ---------- Forwarded message ----------
> Date: Fri, 20 Oct 2000 18:40:21 EDT
> From: ACTSNYC@cs.com
> Subject: Re: boiling point of manganese dioxide -- (fwd)
>
> >
> > Date: Thu, 19 Oct 2000 02:19:25 -0400
> > From: Jon Singer
> > Reply-To: Ceramic Arts Discussion List
> > To: CLAYART@LSV.CERAMICS.ORG
> > Subject: Re: boiling point of manganese dioxide --
> >
> >SNIP
>
> > Gavin or Monona (or anyone else), do you have a source for good info on
> this? <
>
> The boiling points of the various manganese compounds are irrelevant. If
> the metal boils, it forms a vapor which immediately oxidizes to the fume
> (MnO2). That's what happens in welding. The compounds and minerals are only
> going to change at high temperatures to other compounds.
>
> My guess is that any gas of this stuff, if it exists, would be so reactive
> that it would be something else in a nanosecond or so.
>
> You have enough to worry about with the dusts of the various compounds and
> the manganese oxide fume.
>
> Or, you can grind up manganese metal fine, add a spark, and watch it explode.
> That's always fun.
>
> Monona
>
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--
Earl Brunner
http://coyote.accessnv.com/bruec
mailto:bruec@anv.net
Elke Blodgett on sat 21 oct 00
---------- Forwarded message ----------
Date: Sat, 21 Oct 2000 12:26:05 EDT
To: eiblodge@freenet.edmonton.ab.ca
Subject: Re: Monona Re: boiling point of manganese dioxide -- (fwd)
>
> ---------- Forwarded message ----------
> Date: Fri, 20 Oct 2000 17:50:38 -0700
> From: Earl Brunner
> Reply-To: Ceramic Arts Discussion List
> To: CLAYART@LSV.CERAMICS.ORG
> Subject: Re: Monona Re: boiling point of manganese dioxide -- (fwd)
Re: My comment that: ...you can grind up manganese metal fine, add a spark,
and watch it explode. That's always fun.
> >
> Manganese will do that too? When I was a scout leader we
> carried a small block of magnesium metal with a flint
> striker imbedded in one side for an emergency fire starter
> in our backpacks. Will both compounds do this? <
Magnesium is one of the best for this, but flint will strike on many
metals--probably on manganese, too. But I'm talking about the powdered
metals. Pyrotechnics are among my many areas of intense interest. And many
powdered metals are used in fireworks.
Recently a theatrical scene shop in the NYC area was cited by OSHA for
improper storage of bronzing powders used as paint pigments. These are made
of powdered aluminum, copper, zinc, and many alloys of these and other
metals. All it takes is a static discharge while pouring aluminum powder
from a can and you can be history.
Its quicker than dioxin.
Monona Rossol
ACTS
181 Thompson St., #23
NYC NY 10012-2586 212/777-0062
ACTSNYC@cs.com
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