Physical and Chemical Properties | TmCl3 = 275.29 colorless crystals, melting point 824 deg C, boiling point of 1440 deg C. (2) TmCl3 · 7H2O = 401.40 green crystals, which were deliquescent and dehydrated by heating in a dry hydrogen chloride atmosphere, became anhydrous salt. Both are readily soluble in cold water and ethanol. Thulium oxide was dissolved in concentrated hydrochloric acid, and Thulium chloride heptahydrate was evaporated; The mixture of thulium oxide and ammonium chloride was heated to 300 ° C. To obtain anhydrous Thulium chloride. |