Dear Colleagues
I am impressed by the excitation over biogenic opal and hydrated silica
oxygen isotopes..
A lot of the questions going around were exactly the same as the one I was
working on during my PhD thesis, in the seventies..
I have few copies left of my thesis in French, with detailed studies of the
oxygen exchangeability, infrared properties... Some of it is outdated, but
specialists may find useful ideas.
I will send them to the first demands
cheers

Laurent


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                   Laurent Labeyrie
         Professeur a l'Universite Paris-Sud Orsay
           Dept. des Sciences de la Terre
                        et
            Centre des  Faibles Radioactivites
                Laboratoire mixte CNRS CEA
            Domaine du CNRS, av. de la Terrasse
            F-91198 Gif/Yvette cedex  France
              tel 33 1 69 82 35 36
              fax 33 1 69 82 35 68

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