Cesium permanganate

Structural formula
	__ Cs + __ O 2− __ Mn 7+
Crystal system	orthorhombic
Space group	Pnma (No. 62)
Lattice parameters	a = 1006 pm , b = 580.1 pm, c = 794.4 pm
General
Surname	Cesium permanganate
other names	Cesium tetraoxomanganate (VII); Cesium manganate (VII); Super manganese acid cesium;
Molecular formula	CsMnO 4
Brief description	purple needle- / octahedral crystals
External identifiers / databases
EC number	622-853-3
ECHA InfoCard	100.151.587
PubChem	23674960
ChemSpider	13198341
Wikidata	Q22668700
properties
Molar mass	251.8406 g mol −1
Physical state	firmly
density	3.60 g cm −3
solubility	slightly soluble in water (2.3 g l −1 at 19 ° C)
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Cesium permanganate is the cesium salt of permanganic acid , HMnO _{4, which is} unknown in the free state . The manganese is in its highest oxidation state + VII.

Manufacturing

Cesium permanganate can be made from potassium permanganate and cesium nitrate .

{\ displaystyle {\ ce {CsNO3 + KMnO4 -> KNO3 + CsMnO4 v}}}

properties

Physical Properties

Cesium permanganate is not very soluble in water, the solubility increases with increasing temperature, at 1 ° C 0.97 g, at 19 ° C 2.3 g and at 59 ° C 12.5 g / l. It crystallizes in the orthorhombic crystal system in the space group Pnma (space group no. 62) with the lattice parameters a = 1006 pm , b = 580.1 pm and c = 794.4 pm. In the unit cell contains four formula units . The crystals are isomorphic to rubidium permanganate , ammonium permanganate and potassium permanganate . Template: room group / 62

Chemical properties

Like potassium permanganate, cesium permanganate decomposes in two stages, with cesium manganate (VI) being formed as an intermediate . Manganese (IV) oxide , cesium oxide and elemental oxygen are formed as further decomposition products . The decomposition takes place between 200 and 300 ° C.

{\ displaystyle {\ ce {10CsMnO4 -> 3Cs2MnO4 + 7MnO2 + 2Cs2O + 6O2 ^}}}

{\ displaystyle {\ ce {2Cs2MnO4 -> 2MnO2 + 2Cs2O + O2 ^}}}

or the overall decomposition reaction:

{\ displaystyle {\ ce {4CsMnO4 -> 4MnO2 + 2Cs2O + 3O2 ^}}}

Individual evidence

↑ ^a ^b ^c R. Hoope, D. Fischer, J. Schneider: For the knowledge of oxides A [MO ₄ ] . About LiMnO ₄ , KMnO ₄ , RbMnO ₄ , CsMnO ₄ as well as RbIO ₄ and CsIO ₄ . (- What does “the crystal structure of ...” actually mean? -). In: Journal of Inorganic and General Chemistry . tape 625 , no. 7 , 1999, p. 1135-1142 , doi : 10.1002 / (SICI) 1521-3749 (199907) 625: 7 <1135 :: AID-ZAAC1135> 3.0.CO; 2-L .
↑ ^a ^b Atherton Seidell (ed.): Solubilities of Inorganic and Organic Substances . A Handbook of the Most Reliable Quantitative Solubility Determinations. D. Van Nostrand Company, 1907 ( limited preview in Google Book search).
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
^ Austin M. Patterson: Solubilities of Permanganates of the Alkali Metals . In: Journal of the American Chemical Society . tape 28 , no. 12 , 1906, pp. 1734–1736 , doi : 10.1021 / ja01978a009 .
↑ W. Muthmann: Contributions to the volume theory of crystallized bodies . In: Journal for Crystallography and Mineralogy . tape 22 , 1894, pp. 530 ( web archive ).
↑ Michael W. Beck, Michael E. Brown: Thermal Analysis of Antimony / Potassium Permanganate Pyrotechnic Compositions . In: Thermochimica Acta . tape 65 , no. 2-3 , July 25, 1983, pp. 197-212 , doi : 10.1016 / 0040-6031 (83) 80022-7 .
↑ Z. Gontarz, B. Pisarska: Thermal decomposition stages of potassium, rubidium and cesium permanganate . In: Journal of Thermal Analysis and Calorimetry . tape 36 , no. 6 , September 1990, pp. 2113-2117 , doi : 10.1007 / BF01914135 .

[Hoppe-1] R. Hoope, D. Fischer, J. Schneider: For the knowledge of oxides A [MO ₄ ] . About LiMnO ₄ , KMnO ₄ , RbMnO ₄ , CsMnO ₄ as well as RbIO ₄ and CsIO ₄ . (- What does “the crystal structure of ...” actually mean? -). In: Journal of Inorganic and General Chemistry . tape 625 , no. 7 , 1999, p. 1135-1142 , doi : 10.1002 / (SICI) 1521-3749 (199907) 625: 7 <1135 :: AID-ZAAC1135> 3.0.CO; 2-L .

[Van_Nostrand-2] Atherton Seidell (ed.): Solubilities of Inorganic and Organic Substances . A Handbook of the Most Reliable Quantitative Solubility Determinations. D. Van Nostrand Company, 1907 ( limited preview in Google Book search).

[NV-3] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[Patterson-4] Austin M. Patterson: Solubilities of Permanganates of the Alkali Metals . In: Journal of the American Chemical Society . tape 28 , no. 12 , 1906, pp. 1734–1736 , doi : 10.1021 / ja01978a009 .

[Muthmann-5] W. Muthmann: Contributions to the volume theory of crystallized bodies . In: Journal for Crystallography and Mineralogy . tape 22 , 1894, pp. 530 ( web archive ).

[Beck-6] Michael W. Beck, Michael E. Brown: Thermal Analysis of Antimony / Potassium Permanganate Pyrotechnic Compositions . In: Thermochimica Acta . tape 65 , no. 2-3 , July 25, 1983, pp. 197-212 , doi : 10.1016 / 0040-6031 (83) 80022-7 .

[Gontarz-7] Z. Gontarz, B. Pisarska: Thermal decomposition stages of potassium, rubidium and cesium permanganate . In: Journal of Thermal Analysis and Calorimetry . tape 36 , no. 6 , September 1990, pp. 2113-2117 , doi : 10.1007 / BF01914135 .