AM_Studenitsite Formula: Na Ca2 B9 O20 H8 Name: Studenitsite Unit cell: 11.503 10.53 12.58 90.0 90.0 99.48 , V=1502.96 Space group: P1121/B (14)

Yamnova N A , Egorov-Tismenko Yu K , Pushcharovskii D Yu , Malinko S V , Dorokhova G I , Crystallography Reports , 38 (1993) p.749-752, Crystal structure of a new natural Na,Ca-hydroborate NaCa2[B9O14(OH)4]*2H2O, Locality: volcanic ash deposit, near Belgrade, Yugoslavia