Preparation
Dysprosium(III) chloride can be prepared as a yellow aqueous solution by reaction of either dysprosium metal or dysprosium(III) carbonate and hydrochloric acid.
- 2 Dy(s) + 6 HCl(aq) → 2 DyCl3(aq) + 3 H2(g)
- Dy2(CO3)3(s) + 6 HCl(aq) → 2 DyCl3(aq) + 3 CO2(g) + 3 H2O(l)
Anhydrous DyCl3 can be made by dehydration of the hydrate either by slowly heating to 400 °C with 4-6 equivalents of ammonium chloride under high vacuum. The anhydrous halide may alternatively be prepared from dysprosium metal and hydrogen chloride. It is usually purified by high temperature sublimation under high vacuum.
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