Dear Juan
My first reaction was for you to try polarized light microscopy. I
found an interesting article on-line from the American Minerologist, 1979
(King & Prewitt). They indicate that the crystal structure they
found was cubic, which would typically not respond to polarized light,
CuS2 has anisotropic optical properties, which would indicate that it
WOULD respond. So my first response would still be for you to try
Pol. If you need a short class on how best to use this technique, I
recommend that you contact my colleague, Phil Robinson (see email
above). For many years, he was a principal lecturer at the North
Staffordshire Polytechnic and a senior instructor with the RMS,
specializing in Pol. He also knows everything there is to know
about minerology and may have other suggestions for you.
Alternatively, if you are trying to produce a color, I would try
dispersion staining from McCrone or, the lovely but old technique of
Rheinberg illumination. Both will "optically" stain your
crystals. If you are interested in learning more, contact me off
line.
Good Hunting!
Barbara Foster, President and Sr. Consultant
Microscopy/Microscopy Education
7101 Royal Glen Trail, Suite A
McKinney TX 75070
P: (972)924-5310
Skype: fostermme
W:
www.MicroscopyEducation.com
NEWS! Visit the NEW and IMPROVED
www.MicroscopyEducation.com! And don't forget: MME is now
scheduling customized, on-site courses for the balance of the year.
Call me for a free assessment and quote.
At 08:14 PM 10/15/2009, you wrote:
Dear all,
Someone knows any way of visualization deposition or aggregates forms of
copper disulfide or sulfide (CuS2 or CuS) by means of an optic
microscope. In its natural form this compund has no autofluorescence. It
colud be also any reaction that produce a color.
Thanks in advance
Best regards
--
Juan Luis Ribas
Servicio de Microscopía
Centro de Investigación, Tecnología e Innovación
Universidad de Sevilla
Av. Reina Mercedes 4b
41012 Sevilla
Tfno: 954559983
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