in neat (no solvent) yttrium 3 d heated in tungsten crucible at 850°C under iodine (from reservoir maintained at 150°C); gray product sublimed in high vac.; very pure YI3 obtained;

in water evapn. (water bath);

in neat (no solvent) heating of Y and HgI2 in a sealed ampoule;

in water byproducts: YOI; Y2O3 dissolved in concd. hydroiodic acid; addn. of solid NH4I (n(NH4I):n(Y2O3) approx. 8), addn. of 10 ml concd. HI, heating to near dryness, cooling, ground; transferred to a quartz tube with a side arm, evacuation to ca. 10 Pa, heated to 373 K for 15-18 h, then temp. rise to 673 K (sublimation of NH4I), then temp. rise to 1223 K (sublimation of YI3), pressure < 0.01 Pa; elem. anal.;

in neat (no solvent) mixt. of metal and I2 was heated to the deflagration point of the mixt. in vac.; excess of I2 was evacuated, tube was filled with Ar, solidified metal part was removed, elem. anal.; metal triiodide was deposited on the wall of tube;

in neat (no solvent) heating up to 750 °C with 3 °C/min rate, 1 bar H2 pressure, Mo-boat; an other phase was also formed;

byproducts: Al2O3; above 230°C; reaction is complete at 400°C and 48 h;

at 700°C;;