Summary
The crystal structure of synthetic KMn[SeO4]2 was determined by single crystal X-ray diffraction methods in space group\(P\bar 1\), a = 4.827(2) Å, b = 4.988(2) Å, c = 7.981(3) Å, α = 83.18(1)°,β = 85.32(2)°, γ = 67.92(1)°, V = 176.66 Å3, Z = 1; 1564 unique data, measured up to 2θ = 70° (MoKα-radiation); R, R(I)w = 0.034, 0.074.
KMn[SeO4]2 is closely related to monoclinic yavapaiite, KFe[SO4]2, and isotypic compounds. Jahn-Teller distorted MnO6 octahedra are alternately linked with KO10 polyhedra along [001]. The mean values of the Mn-O and Se-O distances are 2.007 Å and 1.637 Å, respectively.
Zusammenfassung
Die Kristallstruktur von synthetisch dargestelltem KMn[SeO4]2 wurde mittels Einkristallröntgenmethoden in der Raumgruppe\(P\bar 1\) bestimmt: a = 4.827(2) Å, b = 4.988(2) Å, c = 7.981(3) Å, α = 83.18(1)°,β = 85.32(2)°, γ = 67.92(1)°, V = 176.66 Å3, Z = 1; 1564 unabhängige Daten bis 2θ = 70° (MoKα-Strahlung); R, R(I)w = 0.034, 0.074.
KMn[SeO4]2 ist eng mit dem monoklinen Mineral Yavapaiit, KFe[SO4]2 und einer Reihe damit isotyper Verbindungen verwandt. Jahn-Teller verzerrte MnO6 Oktaeder sind alternierend mit KO10 Polyedern parallel [001] verbunden. Die Mittelwerte der Mn-O und Se-O Abstände sind 2.007 Å bzw. 1.637 Å.
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Giester, G. Crystal structure of KMn3+ [SeO4]2 — a triclinic distorted member of the Yavapaiite family. Mineralogy and Petrology 53, 165–171 (1995). https://doi.org/10.1007/BF01171954
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DOI: https://doi.org/10.1007/BF01171954