AM_Richterite_10 Formula: Si8 Co5 (Na Ca) K O24 H2 Name: Richterite Unit cell: 10.1166 18.066 5.2752 90.0 104.846 90.0 , V=931.95 Space group: C12/M1 (12)

Della Ventura G , Robert J-L , Raudsepp M , Hawthorne F C , American Mineralogist , 78 (1993) p.633-640, Site occupancies in monoclinic amphiboles: Rietveld structure refinement of, synthetic magnesium cobalt potassium richterite, Sample: KCo100, Atomic parameters from ICSD