Citation: Irwin, M. B.; Peterson, R. C. (1999). The crystal structure of ludwigite. The Canadian Mineralogist, 37, pp. 939-943.
Formula: Al0.08 B Fe1.214 Mg1.707 O5
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al4 B4 Fe12 Mg8 O20 (Al B Fe3 Mg2 O5)
Multiplicity: 1