Why aqueous alteration in asteroids was isochemical: High porosity [not equal] high permeability - Bland, Phil; Jackson, M.; Coker, R.; Cohen, B.; Webber, J.B.; Lee, M.; Duffy, C.; Chater, R.; Ardakani, M.; McPhail, D.; McComb, D.; Benedix, Gretchen (Elsevier Science BV, 2009)