gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1998.62A.3.149 Evolution of the Weathering Rate of a Labradorite Feldspar Introduced in Acid Soils Over Nine Years Turpault M.-P. Augusto L. Bonnaud P. Ranger J. Department of Forested Research, INRA, 54280 Champenoux, France 1998 62A 3 1555 1556 Copyright © 1998, The Mineralogical Society 1998