Citation: Yang, H.; Smyth, J. R. (1996). Crystal structure of a P2_1/m ferromagnesian cummingtonite at 140 K T = 295 K. American Mineralogist, 81, pp. 363-368.
Formula: Fe2.559 Mg4.441 O24 Si8
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Fe14 Mg14 O48 Si16 (Fe7 Mg7 O24 Si8)
Multiplicity: 1