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RbC2H3O2 -4 mesh 99.9% Pure

Rubidium Acetate


Rb2CO3 -20 mesh 99.9% Pure

Rubidium Carbonate


RnCl -4 mesh 99.9% Pure

Rubidium Chloride


Rb2CrO4 -20 mesh 99.9% Pure

Rubidium Chromate

5.1 UN1479 PG III Oxidizer


RbF -4 mesh 99.9% Pure

Rubidium Fluoride


RbIO3 -4 mesh 99.9% Pure

Rubidium Iodate

5.1 UN1479 PG II Oxidizer


Rb2MoO4 -200 mesh 99.5% Pure

Rubidium Molybdate


RbNbO3 -200 mesh 99.5% Pure

Rubidium Niobate


RbNO3 -80 mesh 99.9% Pure

Rubidium Nitrate

5.1 UN1477 PG III Oxidizer


RbClO4 -4 mesh 99.9% Pure

Rubidium Perchlorate

5.1 UN1481 PG II Oxidizer


Rb2Se -60 mesh 99.5% Pure

Rubidium Selenide

4.3 UN1423 PG I Dangerous when wet


Rb2SO4 -20 mesh 99.9% Pure

Rubidium Sulphate


RbTaO3 -200 mesh 99.5% Pure

Rubidium Tantalate


Rb2TiO3 -200 mesh 99.5% Pure

Rubidium Titanate


Rb2WO4 -200 mesh 99.5% Pure

Rubidium Tungstate


RbVO3 (meta) -100 mesh 99.5% Pure

Rubidium vanadate

6.1 UN3288 PG II Toxic


Rb3V2O7 (pyro) -100 mesh 99.5% Pure

Rubidium vanadate

6.1 UN3288 PG II Toxic


Rb2CO3 -14 mesh 99.95% Pure

Rubidium Carbonate

Rubidium, the second most electropositive of the stable alkali elements, distinguishes itself with unique physical and chemical characteristics. Notably, rubidium has the remarkable property of liquefying at relatively high ambient temperatures, with its melting point at 102.7 °F (39.3 °C). However, its reactivity with water is one of its defining features, similar to the other group 1 elements. When introduced to water, rubidium undergoes a violent reaction, often igniting the liberated hydrogen. Furthermore, rubidium has been documented to ignite spontaneously upon exposure to air, underscoring its highly reactive nature.

In addition to its reactive behaviour, rubidium shares commonalities with other alkali metals in its ability to form amalgams with mercury and alloys with various metals, including gold, caesium, sodium, and potassium. This versatility in forming alloys extends its utility across diverse industrial applications.

One distinctive feature of rubidium is its ability to impart a reddish-violet hue to a flame, which inspired its name. This characteristic flame colouration makes rubidium a valuable tool in flame tests and spectral analysis, aiding in the identification and analysis of substances in laboratory settings.

Symbol Rb
Atomic number 37
No. of naturally occurring isotopes 1+1*
Atomic weight 85.4678(+/-3)
Electronic configuration [Kr]5s'
Metal radius/pm 248
Ionic radius(6-coordinate)/pm 152
E° (M+(aq)\ + e- →M(s))/V -2.93
Density (20°C)/gcm3 1.532
Melting point / °C 39
Boiling point / °C 688
ΔHfus/kJmol-1 2.2
ΔHvap/kJmol-1 76
ΔHf(monoatomic gas)/kJmol-1 88
ΔHdissoc/kJmol-1 47.3
Ionization energy/kJmol-1 402.9
* (radioactive 87Rb t½ 5.7x 1010y)
Temperature (oC) @Vap. Pressure
10-8 Torr -3
10-6 Torr 37
10-4 Torr 111
Electron Beam -
Crucible Quartz
Coil -
Boat -