Syntheses and Characterization of the Mixed-Valent Manganese(II/III) Fluorides Mn2F5and Mn3F8

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2021-09-06
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Language
en
Pages
13
12651-12663
Series
Inorganic Chemistry, Volume 60, issue 17
Abstract
We obtained single crystals of the binary mixed-valent fluorides Mn2F5 and Mn3F8 using a high-pressure/high-temperature approach. Mn2F5 crystallizes isotypic to CaCrF5 in the monoclinic space group C2/c (No. 15), with a = 8.7078(8) Å, b = 6.1473(6) Å, c = 7.7817(7) Å, β = 117.41(1)°, V = 369.80(6) Å3, Z = 4, and mC28 at T = 173 K. Mn3F8 crystallizes in the monoclinic space group P21 (No. 4) with a = 5.5253(2) Å, b = 4.8786(2) Å, c = 9.9124(4) Å, β = 92.608(2)°, V = 266.92(2) Å3, Z = 2, and mP22 at T = 183 K and presents a new structure type. Crystal-chemical reasoning, CHARDI calculations, and quantum-chemical calculations allowed for the assignment of the oxidation states of the Mn atoms. In both bulk compounds, MnF2 was present as an impurity, as evidenced by powder X-ray diffraction and IR and Raman spectroscopy.
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Publisher Copyright: © 2021 American Chemical Society.
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Bandemehr , J , Zimmerhofer , F , Ivlev , S I , Pietzonka , C , Eklund , K , Karttunen , A J , Huppertz , H & Kraus , F 2021 , ' Syntheses and Characterization of the Mixed-Valent Manganese(II/III) Fluorides Mn 2 F 5 and Mn 3 F 8 ' , Inorganic Chemistry , vol. 60 , no. 17 , pp. 12651-12663 . https://doi.org/10.1021/acs.inorgchem.1c01833