Citation: Artioli, G.; Fumagalli, P.; Poli, S. (1999). The crystal structure of Mg8(Mg2Al2)Al8Si12(O,OH)56 pumpellyite and its relevance in ultramafic systems at high pressure. American Mineralogist, 84, pp. 1906-1914.
Formula: Al5.01 Mg4.76 O28 Si6
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al12 Mg10 O56 Si14 (Al6 Mg5 O28 Si7)
Multiplicity: 1
Coordination sequences: