Dear Chris,

the only study I know of is the theoretical calculation by Zheng:

Zheng, Y.F. (1993) Calculation of oxygen isotope fractionation in
hydroxyl-bearing silicates. Earth Planet. Sci. Lett. 120, 247-263.

As prehnite is commonly associated with zeolites, you may want to check out
the following references too:

Karlsson H.R. and Clayton R.N. (1990) Oxygen and hydrogen isotope
geochemistry of zeolites. Geochimica et Cosmochimica Acta 54, 1369-1386.

and

Naehr T, Botz R., Bohrmann G., and Schmidt M. (1998) Oxygen isotopic
composition of low-temperature authigenic clinoptilolite. Earth Planet. Sci.
Lett. 160, 369-381.

Greetings,

Torsten.

---------------------------
Dr. Torsten W. Vennemann
Institute for Geochemistry
University of Tuebingen
Wilhelmstr. 56
D-72076 Germany

Tel: +49 (0)7071 297 4992
Fax: +49 (0) 7071 29 5713
--------------------------

> Dear All
>
> I am looking for O- and H-isotope fractionation factors between
> prehnite and water (experimental or otherwise). I would be very
> grateful if somebody could point me towards an appropriate reference.
>
> Many Thanks
>
> Chris Harris
>
> -------------------------------------------------------------
> Chris Harris
> Geological Sciences
> University of Cape Town
> Rondebosch 7700
> South Africa
> Tel: 021-6502926 (office)
>      021-6503275 (Stable Isotope Lab)
>      021-6503783 (Fax)
> -------------------------------------------------------------
>