AM_Poudretteite Formula: K Na2 B3 Si12 O30 Name: Poudretteite Unit cell: 10.253 10.253 13.503 90.0 90.0 120.0 , V=1229.31 Space group: P6/MCC (192)

Grice J D , Ercit T S , Van Velthuizen J , Dunn P J , The Canadian Mineralogist , 25 (1987) p.763-766, Poudretteite, KNa2B3Si12O30, a new member of the osumilite group from, Mont Saint-Hilaire, Quebec, and its crystal structure, Locality: Mont Saint-Hilaire, Quebec, Canada