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Identifiers | |
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3D model (
JSmol)
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ChemSpider | |
PubChem
CID
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CompTox Dashboard (
EPA)
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Properties | |
RbMnO4 | |
Molar mass | 204.404 |
Appearance | purple crystals [1] |
Density | 3.325 g·cm−3 [2] |
Melting point | 295 °C (decomposes) [2] |
10.6 g·l−1 (19 °C) [3] | |
Structure | |
orthorhombic | |
Pnma (Nr. 62) | |
a = 954.11 pm, b = 573.926 pm, c = 763.63 pm
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Related compounds | |
Other
anions
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rubidium perchlorate rubidium periodate rubidium pertechnetate |
Other
cations
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lithium permanganate sodium permanganate potassium permanganate ammonium permanganate caesium 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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Rubidium permanganate is the
permanganate salt of
rubidium, with the chemical formula RbMnO
4.
Rubidium permanganate can be formed by the reaction of potassium permanganate and rubidium chloride: [4] [5]
Rubidium permanganate is soluble in water with a solubility of 6.03 g/L at 7 °C, [3] 10.6 g/L at 19 °C, [2] and 46.8 g/L at 60 °C. [6] Its crystal structure is orthorhombic, [1] the same as caesium permanganate, ammonium permanganate and potassium permanganate.
Similar to potassium permanganate, the two-step decomposition of rubidium permanganate leads to the formation of rubidium manganate intermediates. It breaks down into manganese dioxide, rubidium oxide and oxygen. [4] The decomposition temperature is between 200 and 300 °C. [7] Drift-away oxygen caused an 8% mass loss in the product. [7]
Total reaction:
In qualitative analysis, rubidium permanganate is used as a reagent to detect perchlorate ions. It is produced as an intermediate from rubidium nitrate and potassium permanganate and precipitates with existing perchlorate ions as RbClO4·RbMnO4 mixed crystal. [8]
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