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Te NMR Probes of Tellurium Oxide Crystals: Shielding-Structure Correlations. | LitMetric
The local environments around tellurium atoms in a series of tellurium oxide crystals were probed by Te solid-state NMR spectroscopy. Crystals with distinct TeO units (n from 3 to 6), including NaTeO, α-TeO and γ-TeO, TeO(PO), KLaTeO, BaZnTeO, and CsYTeO were studied. The latter four were synthesized through a solid-state process. X-ray diffraction was used to confirm the successful syntheses. The Te chemical shift was found to exhibit a strong linear correlation with the Te coordination number. The Te chemical-shift components (δ, δ, and δ) of the TeO units were further correlated to the O-Te-O-bond angles. With the aid of Te NMR, it is likely that these relations can be used to estimate the coordination states of Te atoms in unknown Te crystals and glasses.
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