[meteorite-list] Protecting Chondrites

From: Adam Hupe <adamhupe_at_meteoritecentral.com>
Date: Thu Apr 22 10:27:52 2004
Message-ID: <00a201c3b154$1fd7a020$d2dbe60c_at_attbi.com>

Hello Vishnu and List,

The best way we have found to cut thin sections from very friable material
is to use a plastic ring.

1) Put the specimen on top of paper.
2) Place a plastic ring around the specimen.
3) Use the same optically correct expoxy used to attach specimens to slides
to fill the
ring around the specimen inside.
4) Let dry.
5) Cut the ring making sure to cut through the specimen trapped in the
epoxy.
6) Proceed as normal.

This method works great.

All the best,

Adam Hupe


----- Original Message -----
From: "vishnu reddy" <moonyguy_at_yahoo.com>
To: "E.J" <jonee_at_epix.net>
Cc: <meteorite-list_at_meteoritecentral.com>
Sent: Saturday, November 22, 2003 3:51 PM
Subject: Re: [meteorite-list] Protecting Chondrites


> Hi Eltion, Bill and everyone
> Thank you for the adivice. I am planning to get a thin section made out of
one of the fragments
> but I am unsure if anything will survive the cutting and polishing
process. Any suggestions on
> doing thin sections of brittle chondrites? Thank you once again for the
help.
> clear skies
> Vishnu
>
> --- "E.J" <jonee_at_epix.net> wrote:
> > Hello List, Vishnu,
> > Some meteorites are very "friable" meaning you can crumble them with
> > little to moderate hand pressure. Friable meteorites are well know but
> > not necessarily common.
> >
> > The rust marks are likely just that-- rusting iron flakes and can come
> > from handling and storage conditions. As I recall this arrived during a
> > monsoon. You might be able to arrest the rusting/lawencite disease
> > using the procedures for stabelizing irons but perhaps another list
> > member can elaborate on treating a friable stone such as Burbojle(sp)
> > which fell through sea ice and deeply into the underlying mud.
> >
> > Elton
> >
> > >I have noticed brown specks on my Orissa chondrite ....are these rust
marks? Is there anyway to
> > >prevent this from happening or at least control this.
> > >Another silly doubt I have is that this meteroite is very
brittle...just breaks apart when
> > pressed
> > >hard...is this common for chondrites?
> > >clear skies
> > >Vishnu
> > >
> > >
> > >
> >
> >
> >
> > ______________________________________________
> > Meteorite-list mailing list
> > Meteorite-list_at_meteoritecentral.com
> > http://www.pairlist.net/mailman/listinfo/meteorite-list
>
>
> =====
> --------------------------------------------------------------------------
-----
> Vishnu Vardhan Reddy
> Department of Space Studies
> University of North Dakota, Grand Forks
> ND 58203, USA.
> Phone-701-777-9641
> www.space.edu
>
> Spaceguard India
> www.spaceguardindia.com
>
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Received on Sat 22 Nov 2003 06:55:36 PM PST