AM_Overite Formula: Ca Mg Al P2 O13 H9 Name: Overite Unit cell: 14.723 18.746 7.107 90.0 90.0 90.0 , V=1961.51 Space group: PBCA (61)

Moore P B , Araki T , American Mineralogist , 62 (1977) p.692-702, Overite, segelerite, and jahnsite: a study in combinatorial polymorphism