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- W4381513254 abstract "Polycrystalline and single crystal specimens of the new quaternary phase MgPr9Mo16O35 were synthesized by direct solid-state reaction. MgPr9Mo16O35 presents a monoclinic unit cell (S.G. C2/m; a = 18.3422 (3) Å, b = 8.6188 (1) Å, c = 9.7276 (4) Å, = 101.9680 (4) and Z = 2). Its crystal structure was solved on a single-crystal by X-ray diffraction and refined to the final values R1 = 0.0281 and wR2 = 0.0473 (3903 independent reflections and 101 variables). For a comparative study the crystal structure of LiPr9Mo16O35 was also determined (a = 18.3422 (3) Å, b = 8.6188 (1) Å, c = 9.7276 (4) Å,= 101.9680 (4) and Z = 2; R1 = 0.0281 and wR2 = 0.0473). The crystal structure of both compounds is based on Mo16O26O10 units containing Mo16 clusters that share some of their O atoms to form infinite Mo-O cluster chains developing in the [010] direction and between which the Mg2+ or Li+ and Pr3+ cations are located. The increase of the charge transfer towards the Mo16 cluster due to the supplementary electron brought by the Mg2+ cations leads to some variations of the Mo-Mo distances. Application of the Mo-O bond-length–bond-strength relationship developed by Brown & Wu leads to a value of 55.1 electrons per Mo16 cluster in good agreement with that calculated from the stoichiometry (55 e-/Mo16). Magnetic susceptibility measurements confirm the presence of one unpaired electron on the Mo16 cluster." @default.
- W4381513254 created "2023-06-22" @default.
- W4381513254 creator A5003525311 @default.
- W4381513254 creator A5068852908 @default.
- W4381513254 date "2023-06-21" @default.
- W4381513254 modified "2023-09-23" @default.
- W4381513254 title "Synthesis, crystal structure, and magnetic properties of MgPr9Mo16O35 – structural comparison with the LiR9Mo16O35 (R = La, Ce, Pr, Nd)" @default.
- W4381513254 doi "https://doi.org/10.26434/chemrxiv-2023-fspxm" @default.
- W4381513254 hasPublicationYear "2023" @default.
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