sodium tetrahydroborate in ethanol High Pressure; SbCl3, cetyltrimethylammonium bromide, NaBH4 and ethanol added to a flask; mixture stirred for 30 min and then tranferred to a Teflon-lined autoclave; autoclave kept at 150°C for 30 h and then cooled to room temp. on standing; samples in the autoclave separated into two layers; the two layer samples collected, washed with distilled water and absolute alcohol for several times, and then dried at 80°C for 8 h;
