Names | |
---|---|
Other names
Rubidium hyperoxide
| |
Identifiers | |
3D model (
JSmol)
|
|
CompTox Dashboard (
EPA)
|
|
| |
| |
Properties | |
RbO2 | |
Molar mass | 117.466 g·mol−1 |
Appearance | Bright yellow [1] |
Structure | |
Distorted CaC2 structure [2] | |
Related compounds | |
Other
cations
|
|
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Rubidium superoxide or rubidium hyperoxide is a chemical compound with the chemical formula RbO2. In terms of oxidation states, the negatively charged superoxide and positively charged rubidium give it a structural formula of Rb+[O2−. [2]
It can be created by slowly exposing elemental rubidium to oxygen gas: [3]
Like other alkali metal hyperoxides, crystals can also be grown in liquid ammonia. [4]
Between 280 and 360 °C, Rubidium superoxide will decompose, leaving not rubidium sesquioxide (Rb2O3), but rather rubidium peroxide (Rb2O2). [3]
An even more oxygen rich compound, that of rubidium ozonide (RbO3) can be created using RbO2. [5]
Roughly speaking, RbO2 has a crystal structure similar to tetragonal calcium carbide, but is rather distorted due to the Jahn–Teller effect, which makes the crystal structure less symmetrical. [2]
RbO2 is stable in dry air, but is extremely hygroscopic. [3]
The compound has been studied as an example of magnetism arising intrinsically from the p-shell. [6] RbO2 has been predicted to be a paramagnetic Mott insulator. [7] At low temperatures, it transitions to antiferromagnetic order, with a Neel temperature of 15 K. [2]
Names | |
---|---|
Other names
Rubidium hyperoxide
| |
Identifiers | |
3D model (
JSmol)
|
|
CompTox Dashboard (
EPA)
|
|
| |
| |
Properties | |
RbO2 | |
Molar mass | 117.466 g·mol−1 |
Appearance | Bright yellow [1] |
Structure | |
Distorted CaC2 structure [2] | |
Related compounds | |
Other
cations
|
|
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Rubidium superoxide or rubidium hyperoxide is a chemical compound with the chemical formula RbO2. In terms of oxidation states, the negatively charged superoxide and positively charged rubidium give it a structural formula of Rb+[O2−. [2]
It can be created by slowly exposing elemental rubidium to oxygen gas: [3]
Like other alkali metal hyperoxides, crystals can also be grown in liquid ammonia. [4]
Between 280 and 360 °C, Rubidium superoxide will decompose, leaving not rubidium sesquioxide (Rb2O3), but rather rubidium peroxide (Rb2O2). [3]
An even more oxygen rich compound, that of rubidium ozonide (RbO3) can be created using RbO2. [5]
Roughly speaking, RbO2 has a crystal structure similar to tetragonal calcium carbide, but is rather distorted due to the Jahn–Teller effect, which makes the crystal structure less symmetrical. [2]
RbO2 is stable in dry air, but is extremely hygroscopic. [3]
The compound has been studied as an example of magnetism arising intrinsically from the p-shell. [6] RbO2 has been predicted to be a paramagnetic Mott insulator. [7] At low temperatures, it transitions to antiferromagnetic order, with a Neel temperature of 15 K. [2]