Some more reference for alunite:

Alpers, C.N., Rye, R.O., Nordstrom, D.K., White, L.D. and King, B., 1992.
Chemical, crystallographic and  stable isotopic properties of alunite and
jarosite from acid-hypersaline Australian lakes.        Lyons,  William Berry,
Long, David T., Herczeg, Andrew L., Hines, Mark E. The geochemistry of acid
        groundwater systems. Univ. Nev., Hydrol./Hydrogeol. Program, Reno, Nv,
United States. Chemical         Geology, 96(1-2): 203-226.
Arehart, G.B. and O'Neil, J.R., 1993. D/H ratio of supergene alunite as an
indicator of paleoclimate in    continental settings. Geophys. Monogr., 78:
277-284.
Ebert, S.W. and Rye, R.O., 1997. Secondary Precious-Metal Enrichment by
Steam-Heated Fluids in the Crofoot-     Lewis Hot-Spring Gold-Silver Deposit
and Relation to Paleoclimate. ECONOMIC GEOLOGY AND THE BULLETIN         OF THE
SOCIETY OF ECONOMIC GEOLOGISTS, 92(5): 578-600.
Krohn, M.D., Kendall, C., Evans-John, R. and Fries-Terry, L., 1993.
Relations of ammonium minerals at several       hydrothermal systems in the
Western U. S. Journal of Volcanology and Geothermal Research, 56(4): 401-       413.
O'Neil, J.R. and Pickthorn, W.J., 1988. Single-mineral oxygen isotope
thermometry. In: Anonymous (Editor),    European Association for Geochemistry
international congress of geochemistry and cosmochemistry. Late         abstracts
to the EAG international congress of geochemistry and cosmochemistry,
Paris, Aug. 29-Sept.    2, pp. 369.



Ana-Voica Bojar
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Ana-Voica Bojar, PhD
tel: +43/316-380-8727
www.kfunigraz.ac.at/gepwww/ana/hatmlav.htm

Institut fuer Geologie und Palaeontologie,
Karl-Franzens Universitaet Graz
Heinrichstrasse 26, A-8010 Graz, Austria