Dear Isogeochemists,

The Istituto di Geocronologia e Geochimica Isotopica, Pisa, Italy, is
organizing, on behalf of, and in collaboration with, the International
Atomic Energy Agency (IAEA) of Vienna, an intercomparison  exercise of boron
isotope measurements in rocks and  waters. Please find, in the attached
file, the announcement of the exercise with a brief description of the
samples preprared for distribution.

Thanks
Sonia Tonarini