Re: pinhole Crystal Lab

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From: Algis Sodonis (asodonis@urbanschool.org)
Date: Wed Nov 28 2001 - 10:37:16 PST 

Message-id: <fc.000f7611002246e93b9aca00adf17f94.2246ee@urbanschool.org>
Date: Wed, 28 Nov 2001 10:37:16 -0800
Subject: Re: pinhole Crystal Lab
From: "Algis Sodonis" <asodonis@urbanschool.org>

You can observe crystals growing in front of your eyes if you do the
following: Make a supersaturated solution epsom salt (magnesium sulfate),
after it cools somewhat, place a few drops on a microscope slide and
encourage the drops to spread out thinly. After a few minutes, crystals will
form. I found that a dissecting microscope works best, though a standard
microscope works also.

Algis Sodonis
the Urban School of SF

pinhole@exploratorium.edu writes:
>Several years ago I used a lab that demonstrated crystal growth very well,
>but of course now I can't find it. We put four different solutions on
>slides, let them sit overnight and observed the growth under the microscope
>the next morning. It showed distinctly different crystal growth patterns.
>Are any of you aware of the solutions that might give this type of crystal
>growth? What I have found so far requires that the crystals grow for
>several days. We would rather use the faster crystal growing solutions if
>possible.
>
>Thank you ahead of time. Pam Blinn, Hart Middle School, Pleasanton, Calif.
>
>
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