Citation: Sinclair, W.; Eggleton, R.A. (1982). Structure refinement of zirkelite from Kaiserstuhl, West Germany. American Mineralogist, 67, pp. 615-620.
Formula: Ca0.87 Fe0.455 Nb0.49 O7 Th0.13 Ti0.905 Tl0.15 Zr
Chemical name: (Ca0.87 Th0.13) (Zr0.85 Tl0.15) (Fe0.33 Ti0.17) (Ti0.36 Nb0.14) (Fe0.125 Ti0.375 Nb0.35 Zr0.15) O7
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Ca8 Fe16 Nb12 O56 Th8 Ti20 Tl8 Zr16 (Ca2 Fe4 Nb3 O14 Th2 Ti5 Tl2 Zr4)
Multiplicity: 1