Lanthanum(III) chloride

Hexagonal

P63 / m

A = 748 pm c = 436 pm

La, Cl

• Lanthanum (III ) chloride
• Lanthanum trichloride

White powder

Fixed

• 3.79 g · cm -3
• 2.23 g · cm -3 ( Heptyhydrat )

860 ° C

1812 ° C

Soluble in water and strong mineral acids

Attention

2370 mg · kg -1 ( LD50, rat, oral)

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Lanthanum is a chemical compound selected from the group of chlorides.

Production and representation

Lanthanum chloride can be obtained by reaction of lanthanum oxide with hydrogen chloride.

Properties

Lanthanum chloride crystallizes in the space group P63 hexagonal / m with lattice parameters a = 748 pm, c = 436 pm and two formula units per unit cell. The heptahydrate crystallizes monoclinic with lattice parameters a = 1237 pm, b = 1068 pm, c = 923 pm and an angle of 114.3 °. The heptahydrate transforms above 90 ° C in the anhydrate to.

Use

Lanthanum is used as a mild Lewis acid for chemical reactions that normally require acidic conditions, such as the conversion of aldehydes to acetals under nearly neutral conditions. It also serves as a catalyst in the fluid catalytic cracking. The Heptyhydrat is used in medicine as a calcium channel blocker and is still in the water to reduce algae growth by binding of phosphates.