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- W1995747610 abstract "The 119Sn MAS NMR resonances of the paramagnetic stannates Ln2Sn2O7 (Ln = Nd, Sm, and Y1.8Sm0.2) have been found to be extremely sensitive to temperature, the isotropic resonances varying, at room temperature, by 14 and 1.1 ppm K−l for Nd2Sn2O7 and Sm2Sn2O7, respectively. This sensitivity has been exploited to develop three chemical-shift thermometers with reciprocal dependences on temperature. Sm2Sn2O7 is suitable for temperature calibration of standard MAS probes and the solid solution Y1.8Sm0.2Sn2O7 is a shift thermometer with an internal reference. Nd2Sn2O7 is proposed as a high-temperature shift thermometer. These thermometers were used to determine the changes in sample temperature, in a Bruker 7 mm double-bearing probe, as the MAS speed was varied. A change of 8.5 K was observed on increasing the MAS speed from 1 to 5 kHz. The short relaxation times of the 119Sn nuclei enabled short recycle times to be used, and spectra of Sm2Sn2O7 could be obtained in seconds." @default.
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- W1995747610 date "1993-02-01" @default.
- W1995747610 modified "2023-10-14" @default.
- W1995747610 title "Temperature-Dependent Solid-State 119Sn- MAS NMR of Nd2Sn2O7, Sm2Sn2O7, and Y1.8Sm0.2Sn2O7. Three Sensitive Chemical-Shift Thermometers" @default.
- W1995747610 doi "https://doi.org/10.1006/jmra.1993.1046" @default.
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