Dear Dr. Pattyn (and others who may be interested),

Enriched stable Sn isotopes (and other elements) are available from
Cambridge Isotope Labs (http://www.isotope.com), Isotec Inc.
(http://www.isotec.com), and the National Labs in the U.S.
(http://www.ornl.gov/isotopes/index.htm).  All these web sites list
the elements, abundances, and chemical forms available.  All the sites have
contact details to request pricing information.

Cheers,
Simon Poulson

*****
Simon R. Poulson
Dept. of Geology & Geophysics
University of Wyoming
Laramie, WY 82071-3006
USA
(307) 766-2885
Fax: (307) 766-6679
[log in to unmask]
*****