Compounds adopting two new structure types containing discrete lanthanide clusters have been found, CsR(R(6)Col(12))(2) (R = Gd or Er) and (Cel)(0.26)(Ce(6)Mnl(9))(2). CsEr(Er(6)Col(12))(2) and CsGd(Gd(6)Col(12))(2) were synthesized in reactions of Csl, Rl(3), Col(2), and R metals (3:19:6:23) heated to 750 degrees C for 500 h followed by slow cooling (0.1 degrees C/min). The X-ray crystal structure of CsEr(Er(6)Col(12))(2) was solved in the Pa (3) over bar space group with a = 18.063(2) angstrom at 250 K (Z = 4, R-1 [l > 2 sigma(l)] = 0.0459). (Cel)(0.26)(Ce(6)Mnl(9)) was synthesized by combining Kl, Cel(3), Mnl(2), and Ce metal and heating to 850 degrees C for 500 h. The single-crystal X-ray structure for (Cel)(0.26)(Ce(6)Mnl(9))(2) was solved in the trigonal, P (3) over bar (147) space group with lattice parameters of a = 11.695(1) angstrom and c = 10.8591(2) angstrom (Z = 2, R-1 [l > 2 sigma(l)] = 0.0895). Elemental analyses (X-ray photoelectron spectroscopy (XPS) and atomic absorption spectroscopy (AAS)) were performed and show the absence of potassium in the structure. A disorder model was refined for the atoms in the large cavity. The magnetic susceptibility data for CsGd(Gd(6)Col(12))(2) is consistent with strong intracluster ferromagnetic coupling, but intercluster antiferromagnetic coupling suppresses the susceptibility below 70 K.