Potassium ozonide
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3D model (JSmol)
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| KO3 | |
| Molar mass | 87.10 g/mol |
| Appearance | Red crystalline solid |
| Density | 1.990 g/cm3[1] |
| Melting point | 25 °C (77 °F; 298 K) (decomposes)[3] |
| Reacts | |
| Solubility | Soluble in liquid anhydrous ammonia[2] |
Refractive index (nD)
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1.39 |
| Structure[4][5] | |
| I4/mcm | |
a = 8.597 Å, c = 7.080 Å
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Formula units (Z)
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8 |
| Related compounds | |
Other anions
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Potassium fluoride Potassium chloride Potassium bromide Potassium iodide |
Other cations
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Lithium ozonide Sodium ozonide Rubidium ozonide Caesium ozonide |
| Potassium oxide Potassium peroxide Potassium superoxide | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Potassium ozonide is an oxygen rich compound of potassium. It is an ozonide, meaning it contains the ozonide anion (O3−). In polarized light, it shows pleochroism.[1] Hybrid functional calculations have predicted the compound is an insulator with a band gap of 3.0 eV, and has magnetic behavior which departs from the Curie–Weiss law.[6]
The compound can be created by reacting ozone with potassium hydroxide, but the yield is quite low, only 5-10%.[7]
- 6 KOH + 4 O3 → 4 KO3 + 2 KOH(H2O) + O2
The compound is metastable, and will decompose to potassium superoxide and oxygen, especially if there is any water in the atmosphere. Long-term storage in very dry atmosphere is possible below around 0 °C.[3]
- KO3 → KO2 + ½ O2
This compound reacts with water to form potassium hydroxide and potassium superoxide.[4]
References
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