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Crystal structure of the yavapaiite type compound NaFe[SeO4]2

Die Kristallstruktur von NaFe[SeO4]2, einer Verbindung des Yavapaiit-Typsre]19921030

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Summary

The crystal structure of hydrothermally grown NaFe[SeO4]2 was determined by single crystal X-ray diffraction methods: space group C2/m, a = 8.231(1)Å b = 5.425(1)Å, c = 7.176(1)Å, β = 92.44(1)°, V = 320.14Å3, Z = 2; 767 unique data, measured up to 20 = 70° (Mo Kx radiation); R,RW= 0.042, 0.055.

NaFe[SeO4]2 is isotypic with yavapaiite, KFe[SO4]2. FeO6 and NaO6 form chains of edge-sharing distorted octahedra with mean Me-O bond lengths of 2.001Å and 2.496Å, respectively, linked via tetrahedral SeO4 groups [<Se-O) = 1.639Å].

Zusammenfassung

Die Kristallstruktur von hydrothermal gezüchtetem NaFe[SeO4]2 wurde mittels Einkristallröntgenmethoden bestimmt: Raumgruppe C2/m, a = 8.231(1)Å, b = 5.425(1)Å, c = 7.176(1)Å, β = 92.44(1)°, V = 320.14Å3, Z = 2; 767 unabhängige Intensitätsdaten, Meßbereich bis 20 = 70° (Mo Kα-Strahlung); R,RW = 0.042, 0.055.

NaFe[SeO4]2 ist isotyp mit Yavapaiit, KFe[SO4]2. FeO6 und NaO6 bilden Ketten von kantenverknüpften, verzerrten Oktaedern mit mittleren Me-O Bindungslängen von 2.001Å bzw. 2.496Å, die über tetraedrische SeO4 Gruppen verbunden sind [<Se-O> = 1.639Å].

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Authors and Affiliations

  1. Institut für Mineralogie and Kristallographie, Universität Wien, Dr. Karl Lueger-Ring 1, A-1010, Wien, Austria

    G. Giester

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  1. G. Giester
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Dedicated to Prof. Josef Zemann on the occasion of his 70th birthday

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Giester, G. Crystal structure of the yavapaiite type compound NaFe[SeO4]2 . Mineralogy and Petrology 48, 227–233 (1993). https://doi.org/10.1007/BF01163100

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