triphenylphosphine mixt. of oleylamine and tetraaqua(oxalato)nickelate(II) heated at 140°C for 60 min; PPh3 added at 240°C; aged at 240°C for 45 min; cooled to room temp.; formation of nanoclusters by addn. of EtOH; washed with EtOH; detn. by XRD;