Rubidium perchlorate

White, odorless, hygroscopic crystals

Fixed

2.8 g · cm -3

192 ° C

Poorly in water ( 10.9 g · l-1 at 21.3 ° C, 180 g · l-1 at 100 ° C)

Risk

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Rubidiumperchlorat is the rubidium salt of perchloric acid.

Production

Rubidiumperchlorat can be made by gently heating a Rubidiumchloratlösung, the Rubidiumchlorat disproportionated then Rubidiumperchlorat and rubidium. This oxygen is released.

Likewise Rubidiumperchlorat can be obtained by chemical oxidation of Rubidiumchlorat by aqueous Rubidiumchloratlösungen with strong oxidizing agents such as Potassium permanganate, and reacting suitable catalysts.

Properties

Physical Properties

The solubility of Rubidiumperchlorat in water increases with increasing temperature and is given in the table below.

Also in common organic solvents Rubidiumperchlorat is almost insoluble:

Rubidiumperchlorat crystallizes in the orthorhombic crystal system with space group Pbnm and lattice parameters a = 749.0 pm, b = 926.9 pm and c = 581.4 pm, in the unit cell contains four formula units. At 279 ° C a phase transformation takes place in a cubic crystal structure with a = 770 pm, are also arranged in the four formula units per unit cell. The crystals are isomorphous to the crystals of potassium perchlorate.

Chemical Properties

When heated to redness to Rubidiumperchlorat decomposed in rubidium chloride and oxygen.

Use

Due to its low solubility Rubidiumperchlorat can be used alongside Rubidiumchloroplatinat, Rubidiumsilicofluorid and Rubdiumborfluorid for the analytical separation of rubidium and potassium.