AM_Richterite_1
Formula: Si8 (Mg3.86 Ni1.14) (Na Ca) K O24 H2
Name: Richterite
Unit cell: 10.0536 17.982 5.2702 90.0 104.879 90.0 , V=920.82
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: KNi20, Atomic parameters from ICSD