AM_Nifontovite Formula: Ca3 B6 O20 H16 Name: Nifontovite Unit cell: 13.119 13.445 9.526 90.0 90.0 118.4 , V=1478.02 Space group: B112/B (15)

Simonov M A , Egorov-Tismenko Y K , Kazanskaya E V , Belokoneva E L , Belov N V , Soviet Physics Doklady , 23 (1978) p.159-161, The hydrogen bonds in the crystal structure of the niphontovite, Ca2/B5O3(OH)6/2*2H2O