Potassium dimanganate
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Potassium dimanganate (III)
| Potassium dimanganate(III) | |
|---|---|
|
potassium di-µ-oxidotetraoxidodimanganate(6−) |
|
| Properties[1] | |
| Molecular formula | K6Mn2O6 |
| Molar mass | 440.46 g mol−1 |
| Appearance | Ruby-red crystals |
| Structure | |
| Space group | P21/b (No. 14) |
| Lattice constant | a = 889(5) pm, b = 677(5) pm, c = 1137(9) pm |
| Lattice constant | α = 90°, β = 90°, γ = 132.1° |
| Distorted tetrahedral (Mn3+) | |
| Related compounds | |
| Other anions | Potassium hypomanganate Potassium manganate Potassium permanganate |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 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
- ^ a b c d Brachtel, G.; Hoppe, R. (1976), "Das erste Oxomanganat(III) mit Inselstruktur: K6[Mn2O6]", Naturwissenschaften 63 (7): 339, doi:10.1007/BF00597313.
- ^ a b 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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