Rubidium iodide

Cubic

A0 = 7.342 Å

• Rubidium iodatum
• Rubi -i

White solid

Fixed

3.11 g · cm -3

642-647 ° C

1300 ° C.

In water 1520 g · l-1 at 17 ° C.

1,647

4708 mg · kg -1 ( LD50, rat, oral)

Template: Infobox chemical / molecular formula search is not possible

Rubidiumiodid is the rubidium salt of hydriodic acid, HI.

Representation

Rubidiumiodid can be prepared by salt formation reaction with hydriodic acid from rubidium:

The synthesis of the elements is possible - metallic rubidium burns with elemental iodine in a violent reaction to Rubidiumiodid.

Properties

Rubidiumiodid forms colorless crystals and is soluble in water. It has a red-violet flame coloration. The refractive index of the crystals is nD = 1.6474.

The solubility in water increases with increasing temperature, and is listed in the table below:

In various organic solvents Rubidiumiodid is only sparingly soluble:

The standard enthalpy of -328.7 kJ = Rubidiumiodid is ΔfH0298 · mol -1, the free standard enthalpy of -325.7 kJ · mol ΔG0298 = 1, and the molar Standardentropie S0298 = 118.11 J · K-1 · mol -1.

Use

Rubidiumiodid is used in addition to other Rubidiumhalogeniden as rubidium chloride and rubidium bromide in medicine as an analgesic and sedative as well as an antidepressant. Finds particular use it as part of eye drops, in which it is available under the designations Rubjovit ® ( containing 8 mg / ml of RBI) and Polijodurato ® is on the market. However, there are studies that prove the Rubidiumiodid allergenic and anti -causing side effects. Homeopathic products containing Rubidiumiodid, are under the name ' rubidium iodatum ' or the abbreviation ' rubi -i' also available.