AM_Carboborite Formula: Mg Ca2 C2 B2 O18 H16 Name: Carboborite Unit cell: 11.011 6.674 10.692 90.0 116.64 90.0 , V=702.32 Space group: P121/N1 (14)

Zhesheng M , Nicheng S , Jinchuan S , Zhizhong P , Bulletin de Mineralogie , 104 (1981) p.578-581, The refinement of the crystal structure of carboborite MgCa2[CO3]2[B(OH)4]2*4H2O