Pentahydroborite

B₂CaH₁₀O₉

Kazanskaya, E. V.Chemodina, T. N.Egorov-Tismenko Y KSimonov, M. A.Belov, N. V.

Soviet Physics Crystallography (1977) 22, 35-36

a=7.845Å   b=6.525Å   c=8.124Å

α=111.62°   β=111.19°   γ=73.44°