[meteorite-list] Are_Mars_Meteorites_Magnetic?

From: pshugar at messengersfromthecosmos.com <pshugar_at_meteoritecentral.com>
Date: Thu, 05 Jan 2012 20:51:51 -0700
Message-ID: <20120105205151.979558876a36f2d1b40acd6b9bcaf01e.44b951bab5.wbe_at_email09.secureserver.net>

 
 
Richard, the List.
There was a reply asking about magnetite.
Magnetite is a form of Iron oxide, having the
formula Fe3O2. The common chemical name is
ferrous-ferric oxide. The formula for magnetite
may also be written as FeO?Fe2O3, which is one part
w?stite (FeO) and one part hematite (Fe2O3).
It contains Iron, therefore it can be a
magnet because the iron has a high Permeability.

Alinco magnets were made before rare earth magnets.
They were made of a mixture of aluminium (Al), nickel (Ni)
and cobalt (Co) Sometimes copper and titanium were added.
In their day, these were the strongest magnets that were
available

Now I'm sure someone will pipe up and ask about
the rare earth magnets.

There are two types: neodymium magnets and samarium-cobalt magnets.
Neodymium magnets are made from an alloy of neodymium, iron and
boron: (Nd2Fe14B). These are the strongest of all the magnets.
Their only drawback is that they oxidize very eazy unless they
are covered with a corrosion protection layer of nichol or some other
material.

The other type of rare earth magnet is samarium-cobalt magnets.
The chemical formula is SmCo5,
These are made from samarium and cobalt.
These magnets are weaker than the neodymium magnets.

I hope this helps to clear up some of the confusion.
Pete Shugar
 


> -------- Original Message --------
> Subject: Re: [meteorite-list] Are_Mars_Meteorites_Magnetic?
> From: <pshugar at messengersfromthecosmos.com>
> Date: Thu, January 05, 2012 7:25 pm
> To: "GREG LINDH" <geeg48 at msn.com>, bernd.pauli at paulinet.de
> Cc: meteorite-list <meteorite-list at meteoritecentral.com>
>
>
> Hello list, Greg, Bernd,
> Yes, everone uses the term magnetic but
> that is not the proper word for what they
> are trying to convey.
> Greg, you are correct in your definition.
> The correct term is Permeability.
> Permeability is defined as the ability to be
> attracted to a magnet.
> Everything has Permeability, but it is to such
> a small degree that the object will not stick to
> the magnet. Almost all living things contain
> some iron, which makes them have a slight Permeability.
> There are only three metals with a high enough
> Permeability to become a magnet. these are
> iron, nichol, and colbalt. Some stainless steel
> can have Permeability by deformation, that is, being
> bent out of shape.
> If you get bent out of shape, maybe you can be
> attracted to a magnet. :)
> A magnet attracts the iron because the iron has
> Permeability.
> Magnetic is the term meaning having the properties
> of a magnet.
> This is sorta like Meteroid, meteor, meteorite.
> I'm sorry that I did not get this out sooner, but
> life got in the way.
> Pete Shugar
>
>
> > -------- Original Message --------
> > Subject: Re: [meteorite-list] Are Mars Meteorites Magnetic?
> > From: GREG LINDH <geeg48 at msn.com>
> > Date: Tue, January 03, 2012 5:49 pm
> > To: <bernd.pauli at paulinet.de>
> > Cc: meteorite-list <meteorite-list at meteoritecentral.com>
> >
> >
> > Hi Bernd,
> >
> > I meant to address this email to you and not to Eric. So here it is again.
> >
> > I have always wondered why people here on the List, keep referring to some meteorites as being "magnetic". To me, being magnetic means having the properties of a magnet. There are no meteorites that natually attract iron, so why are they described as being "magnetic"? Am I wrong?
> >
> >
> > Regards,
> >
> > Greg L.
> >
> >
> >
> >
> >
> > > From: bernd.pauli at paulinet.de
> > > To: meteorite-list at meteoritecentral.com
> > > Date: Tue, 3 Jan 2012 23:36:07 +0000
> > > Subject: [meteorite-list] Are Mars Meteorites Magnetic?
> > >
> > > Eric inquired:
> > >
> > > "Are Mars meteorites magnetic at all?"
> > >
> > > Some of them are definitely attracted to a magnet!
> > >
> > > One of these is Bob Verish's Los Angeles and when I held
> > > a magnet to one my LAs, it readily jumped to the magnet!
> > >
> > > See, for example:
> > >
> > > COLLINSON D.W.(1997) Magnetic properties of Martian meteorites:
> > > Implications for an ancient Martian magnetic field (Meteoritics 32-6, 1997, 803).
> > >
> > > Best wishes for 2012,
> > >
> > > Bernd
> > >
> > >
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Received on Thu 05 Jan 2012 10:51:51 PM PST