AM_Richterite_5
Formula: Si8 Ni5 (Na Ca) K O24 H2
Name: Richterite
Unit cell: 10.0297 17.942 5.2576 90.0 104.982 90.0 , V=913.96
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: KNi100, Atomic parameters from ICSD