Citation: Hesse, K. F.; Liebau, F.; Merlino, S. (1992). Crystal structure of rhodesite, HK1-xNax+2yCa2-y(lB,3,22)(Si8O19)*(6-z)H2O, from three localities and its relation to other silicates with dreier double layers Locality: San Venanzo, Italy. Zeitschrift fur Kristallographie, 199, pp. 25-48.