<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Microcrystalline Ba<sub>3</sub>[Rh(CN)<sub>3</sub>] is prepared from Ba<sub>2</sub>N, Rh, NaCN and graphite in the molar ratio Ba:Rh:C:N = 3:1:3:2.5 (Nb capsule in silica tube, 1070 K, 24 h).</p> </abstract>