AM_Biringuccite Formula: Na2 B5 O10 H3 Name: Biringuccite Unit cell: 11.1955 6.5607 20.7566 90.0 93.891 90.0 , V=1521.06 Space group: P121/C1 (14)

Corazza E , Menchetti S , Sabelli C , American Mineralogist , 59 (1974) p.1005-1015, The crystal structure of biringuccite, Na4[B10O16(OH)2].2H2O