Dear Delia, For hydrogen isotope mineral-water fractionations other than Suzuoki & Epstein (1976) look into: C.M. Graham and S.M.F. Sheppard, Experimental hydrogen isotope studies, II. Fractionations in the system epidote - NaCl - H2O, epidote - CaCl2 - H2O and epidote - seawater, and the hydrogen isotope composition of natural epidotes., Earth Planet. Sci. Lett. 49, 237-251, 1980. C.M. Graham, S.M.F. Sheppard and T.H.E. Heaton, Experimental hydrogen isotope studies - I. Systematics of hydrogen isotope fractionation in the system epidote - H2O, zoisite - H2O and AlO(OH) - H2O., Geochim. Cosmochim. Acta 44, 353-364, 1980. C.M. Graham, R.S. Harmon and S.M.F. Sheppard, Experimental hydrogen isotope studies: hydrogen isotope exchange between amphibole and water., Am. Mineral. 69, 128-138, 1984. C.M. Graham, J.A. Viglino and R.S. Harmon, Experimental study of hydrogen-isotope exchange between aluminous chlorite and water and of hydrogen diffusion in chlorite., Am. Mineral. 72, 566-579, 1987. For tourmaline hydrogen isotope systematics the following references might be the ones you are looking for: D. Blamart, M. Pichavant and S.M.F. Sheppard, D/H isotopic fractionation between tourmaline and water: The experimental calibration of tourmaline-mineral geothermometers at 50°C to 700°C., Chem. Geol. 70, 182, 1988. D. Blamart, M. Pichavant and S.M.F. Sheppard, Détermination expérimentale du fractionement isotopique D/H entre tourmaline et eau à 600, 500°C et 3 kbar., C. R. Acad. Sci. Paris t. 308(Série II), 39-44, 1989. D. Blamart, M. Boutaleb, S. Sheppard, C. Marignac and A. Weisbrod, A comparative thermobarometric (chemical and isotopic) study of a tourmalinized pelite and its Sn-Be vein, Walmès, Morocco., Eur. J. Mineral. 4, 355-368, 1992. T.G. Kotzer, T.K. Kyser, R.W. King and R. Kerrich, An emperical oxygen- and hydrogen-isotope geothermometer for quartz-tourmaline and tourmaline-water., Geochim. Cosmochim. Acta 57, 3421-3426, 1993. B.E. Taylor and J.F. Slack, Tourmalinites from Appalachian - Caledonian massive sulfide deposits: Textural, chemical, and isotopic relationships., Econ. Geol. 79, 1703-1726, 1984. Best wishes, Pier de Groot ************************************************************** Dr. P.A. de Groot University of the Witwatersrand Economic Geology Research Unit Department of Geology Private Bag 3 2050 Johannesburg South Africa Tel. +27 11 7162564 Fax. +27 11 3391697 E-mail <[log in to unmask]> Visit the combined HOME-PAGE of EGRU-Geology on the Internet: http://www.wits.ac.za/science/geology/1stpage.htm **************************************************************