Citation: Della Ventura, G.; Robert, J.-L.; Raudsepp, M.; Hawthorne, F. C. (1993). Site occupancies in monoclinic amphiboles: Rietveld structure refinement of synthetic magnesium cobalt potassium richterite Sample: KNi40 Atomic parameters from ICSD. American Mineralogist, 78, pp. 633-640.