AM_Pentahydroborite Formula: Ca B2 O9 H10 Name: Pentahydroborite Unit cell: 7.845 6.525 8.124 111.62 111.19 73.44 , V=354.89 Space group: P-1 (2)

Kazanskaya E V , Chemodina T N , Egorov-Tismenko Y K , Simonov M A , Belov N V , Soviet Physics Crystallography , 22 (1977) p.35-36, Refined crystal structure of pentahydroborite Ca(B2O(OH)6)*(H2O)2