Holmium(III) chloride

C2 / m

Holmiumtrichlorid

Light yellow solid

Fixed

3.7 g · cm -3

• 718 ° C
• 165 ° C ( hexahydrate)

1470 ° C

Soluble in water

Attention

5.165 mg · kg -1 ( LD50, mouse, oral)

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Holmium (III ) chloride is a chemical compound selected from the group of chlorides.

Production and representation

Holmium (III ) chloride can be obtained by reaction of holmium (III ) oxide and ammonium chloride at 200-250 ° C.

The hexahydrate is formed by reaction of holmium with hydrochloric acid. By reaction with thionyl chloride it can be converted to the anhydrate.

Holmium (III ) chloride can also be synthesized directly from the elements holmium and chlorine.

Properties

Holmium (III ) chloride hexahydrate and his are bright yellow solids which are soluble in water. The hexahydrate begins at 64 ° C to give water of crystallization. Holmium (III ) chloride has a monoclinic crystal structure corresponding to that of aluminum (III ) chloride.

Use

Holmium (III ) chloride is used for the preparation of pure holmium.