A temperature-dependent Sn-119 and Fe-57 Mossbauer study of malayaite, CaSuSiO(5): Fe

作者：Niemeier D^*; Mehner H; Bismayer U; Becker KD

来源：Physica Status Solidi B-Basic Solid State Physics, 1999, 211(2): 581-594.

DOI：10.1002/(SICI)1521-3951(199902)211:2<581::AID-PSSB581>3.0.CO;2-M

We report on a temperature-dependent Mossbauer study of natural and synthetic malayaite, CaSnSiO5. Sn-119 spectra have been measured between liquid nitrogen temperatures and 1310 K. The Sn-119 Mossbauer shift is found to show a significantly reduced temperature dependence if compared with predictions for the second-order Doppler contribution. In iron doped malayaite, the two dominating Fe-57 subspectra are attributed to ferric ions located on Sn and Ca sites. The temperature-dependent spectra of Sn-119 and Fe-57 are discussed in context with the structural anomaly at about 500 K reported by Great et al. From comparison of quadrupole interactions of tin and iron, an estimate of the nuclear quadrupole moment of Sn-119 is derived as Q = 0.13b which is in good agreement with recent studies.

• 出版日期1999-2