CAS number : 18088-11-4
Molecular weight :336.54
Molecular formula/chemical symbol :Rb2O3
Description :
density :3.518g/cm3
Rubidium oxide is the chemical compound with the formula Rb2O. Rubidium oxide is highly reactive towards water, and therefore it would not be expected to occur naturally. The rubidium content in minerals is often calculated and quoted in terms of Rb2O. In reality, the rubidium is typically present as a component of (actually, an impurity in) silicate or aluminosilicate. A major source of rubidium is lepidolite, KLi2Al(Al,Si)3O10(F,OH)2, wherein Rb sometimes replaces K.
Rb2O is a yellow colored solid. The related species Na2O, K2O, and Cs2O are colorless, pale-yellow, and orange, respectively.
The alkali metal oxides M2O (M = Li, Na, K, Rb) crystallise in the antifluorite structure. In the antifluorite motif the positions of the anions and cations are reversed relative to their positions in CaF2, with rubidium ions 8 coordinate (cubic) and oxide ions 4 coordinate (tetrahedral).
Rubidium oxide |
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IUPAC name[hide] Rubidium oxide |
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Other names[hide] Rubidium(I) oxide Dirubidium oxide |
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Identifiers |
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Properties |
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Rb2O |
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186.94 g/moL |
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Appearance |
Yellow solid |
4 g/cm3 |
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>500 °C |
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Solubility in water |
Reacts violently to give RbOH |
Structure |
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Antifluorite (cubic), cF12 |
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Fm3m, No. 225 |
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Tetrahedral (Rb+); cubic (O2–) |
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Hazards |
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EU Index |
Not listed |
Main hazards |
Corrosive, reacts violently with water |
Non-flammable |
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Related compounds |
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Other cations |
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Related compounds |
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Y (verify) (what is: Y/N?) |
USES :
Used
as a TV glass bulbs, glassware coloring agent the metal neodymium and magnetic
materials raw materials
Report :
Product name |
Rubidium oxide |
CAS:18088-11-4 |
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Description |
Lavender powder |
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TEST ITEMS |
TEST RESULTS |
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Rb2O3 |
≥99.9% |
≥99.5% |
≥99.0% |
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La2O3 |
≤0.01% |
≤0.02% |
≤0.05% |
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CeO2 |
≤0.01% |
≤0.05% |
≤0.05% |
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Pr6O11 |
≤0.03% |
≤0.20% |
≤0.50% |
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Sm2O3 |
≤0.01% |
≤0.03% |
≤0.05% |
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Eu2O3 |
≤0.0050% |
≤0.01% |
≤0.01% |
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Y2O3 |
≤0.0050% |
≤0.01% |
≤0.01% |
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Fe2O3 |
≤0.0020% |
≤0.0030% |
≤0.0030% |
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CaO |
≤0.0030% |
≤0.0050% |
≤0.0050% |
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Al2O3 |
≤0.0050% |
≤0.0100% |
≤0.0300% |
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SiO2 |
≤0.0050% |
≤0.0050% |
≤0.0050% |