Potassium dimanganate(III)
| Names | |
|---|---|
| IUPAC name
potassium di-µ-oxidotetraoxidodimanganate(6−) | |
| Properties[1] | |
| K6Mn2O6 | |
| Molar mass | 440.46 g mol−1 |
| Appearance | Ruby-red crystals |
| Structure[1] | |
| P21/b (No. 14) | |
| a = 889(5) pm, b = 677(5) pm, c = 1137(9) pm α = 90°, β = 90°, γ = 132.1° | |
| Distorted tetrahedral (Mn3+) | |
| Related compounds | |
| Other anions |
Potassium hypomanganate Potassium manganate Potassium permanganate |
| Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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| Infobox references | |
Potassium dimanganate(III), K6Mn2O6, is a manganese(III) compound. Unlike lithium and sodium manganites, MMnO2, which are best described as mixed oxides, potassium dimanganite contains discrete Mn2O6−
6 anions in the solid state.[2] It rapidly hydrolyzes in air.[1]
K6Mn2O6 is prepared as ruby-red crystals by the reaction of excess potassium oxide with manganese(II) oxide in a sealed nickel bomb at 610 °C for ten days.[1] The Mn2O6−
6 anion has an Al2Cl6-type structure.[1][2]
References
- 1 2 3 4 5 Brachtel, G.; Hoppe, R. (1976), "Das erste Oxomanganat(III) mit Inselstruktur: K6[Mn2O6]", Naturwissenschaften 63 (7): 339, doi:10.1007/BF00597313.
- 1 2 Cotton, F. Albert; Wilkinson, Geoffrey (1980), Advanced Inorganic Chemistry (4th ed.), New York: Wiley, p. 741, ISBN 0-471-02775-8.
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