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The orthorhombic polymorph of diammonium trichromate(VI) decaoxide, α-(NH4)2Cr3O10

Barbara M. Casari ; Elisabeth Öberg ; Vratislav Langer (Institutionen för kemi- och bioteknik, Oorganisk miljökemi)
Journal of Chemical Crystallography (1074-1542). Vol. 37 (2007), 2, p. 135-140.
[Artikel, refereegranskad vetenskaplig]

Synthesis and crystal structure of a trichromium(VI) decaoxide compound, α-(NH4)2Cr3O10, is reported. The crystal structure has been determined from three dimensional X-ray data collected at low temperature, 173 K. The structure is isomorphous with its Rb and Cs trichromate analogues, orthorhombic, space group Pbca, with a = 11.2558(3), b = 9.3193(3), c = 18.9819(5) Å and Z = 8. The title compound is composed of discrete [Cr3O10]2- chains held together by the counter ion charge and a hydrogen bonding network. The different conformations adopted by trichromate anion within its ammonium, alkali and organic salts are discussed.

Nyckelord: ammonium trichromate, trichromate, polychromate, conformation of trichromate ion , X-ray diffraction

Denna post skapades 2007-01-22. Senast ändrad 2013-06-19.
CPL Pubid: 25893


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Institutionen för kemi- och bioteknik, Oorganisk miljökemi (2005-2014)


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