AM_Povondraite
Formula: Na Fe9 B3 Si6 O31 H1.998
Name: Povondraite
Unit cell: 16.186 16.186 7.444 90.0 90.0 120.0 , V=1688.95
Space group: R3M (160)

Grice J D , Ercit T S , Hawthorne F C , American Mineralogist , 78 (1993) p.433-436, Povondraite, a redefinition of the tourmaline ferridravite, Note: Atomic parameters updated by Grice on 11/20/2001.