Citation: Abdu, Y. A.; Hawthorne, F. C. (2009). Crystal structure and Mossbauer spectroscopy of tschermakite from the ruby locality at Fiskenaesset, Greenland. The Canadian Mineralogist, 47, pp. 917-926.
Formula: Al2.37 Ca1.8 Cr0.2 Fe0.47 H2 K0.1 Mg3.66 Na0.88 O24 Si6.44
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al22 Ca4 Cr4 Fe14 H4 Mg10 Na4 O48 Si16 (Al11 Ca2 Cr2 Fe7 H2 Mg5 Na2 O24 Si8)
Multiplicity: 1