Sani, A.; Quartieri, S.; Boscherini, F.; Antonioli, G.; Feenstra, A.; Geiger, C. A. (2004): Fe2+-O and Mn2+-O bonding and Fe2+- and Mn2+-vibrational properties in synthetic almandine-spessartine solid solutions: an X-ray absorption fine structure study. European Journal of Mineralogy, 16, 5, 801-808.