Synthesis and structure of a new aluminium citrate trimer from aqueous solution at very low pH

A novel trinuclear Al(III) citrate complex, [Al(H2O)6][(Al3(C6H4O7)2(OH)2(H2O)4]2(NO3)·6H2O, can be synthesised from solutions containing 1 :1 and 10 :1 aluminium to citrate ratios providing the pH is within the range 1.2–3.0.