Divalent metal incorporation in MIL-74, the super-sodalite aluminum phosphates M3Al6(PO4)(12)center dot 4tren center dot 17H(2)O (M = Mg, Mn, Co) and its gallium phosphate analogs M ' Ga-6(PO4)(12)center dot 4tren center dot 17H(2)O (M ' = Mg, Mn, Co, Fe, Zn)