Carboborite

C₂H₁₆B₂Ca₂MgO₁₈

Zhesheng, M.Nicheng, S.Jinchuan, S.Zhizhong, P.

Bulletin de Mineralogie (1981) 104, 578-581

a=11.011Å   b=6.674Å   c=10.692Å

α=90°   β=116.64°   γ=90°