AM_Potassicarfvedsonite Formula: K.684 Na2.216 Fe4.46 Mn.2 Ti.06 Li.28 Si8 O23.6 F.4 H1.6 Name: Potassicarfvedsonite Unit cell: 10.002 18.054 5.319 90.0 103.9 90.0 , V=932.36 Space group: C12/M1 (12)

Pekov I V , Chukanov N V , Lebedeva Y S , Pushcharovsky D Y , Ferraris G , Gula A , Zadov A E , Novakova A A , Petersen O V , Neues Jahrbuch fur Mineralogie, Monatshefte , 2004 (2004) p.555-574, Potassicarfvedsonite, KNa2Fe2+4Fe3+Si8O22(OH)2,a K-dominant amphibole of the, arfvedsonite series from agpaitic pegmatites - Mineral data, structure, refinement and disorder in the A site, Locality: Ilimaussaq, Greenland