The crystal structures for two compounds were determined from single-crysta
l X-rap diffraction: NdRu2Si2, 14/mmm space group, a=4.189(1), c=9.754(8) A
ngstrom, V=171.16 Angstrom(3), rho=7.811 g/cm(3), mu = 240.7 cm(-1), R = 0.
0379 for 114 reflections and NdRh2(Si,Ge)(2), 14/mmm space group, a = 4.182
(1), c=9.829(4) Angstrom, V = 171.90 Angstrom(3), rho = 8.708 g/cm(3), mu =
330.1 cm(-1), R = 0.0533 for 152 reflections. Both structures belong to th
e CeGa2Al2 type of structure. (C) 2000 Elsevier Science S.A. All rights res
erved.