Citation: Dollase, W.A. (1971). Refinement of the crystal structures of Epidote, Allanite and Hancockite. American Mineralogist, 56, pp. 447-463.
Formula: Al2.02 Ca1.25 Fe0.98 H O13 Pb0.5 Si3 Sr0.25
Chemical name: Ca (Pb.5 Sr.25 Ca.25) Al Al.86 Fe.14 Al.16 Fe.84 Si3 O13 H
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al6 Ca2 Fe4 O26 Pb2 Si6 Sr2 (Al3 Ca Fe2 O13 Pb Si3 Sr)
Multiplicity: 1