Add time:09/07/2019         Source:sciencedirect.com

Barium tin(II) chloride fluorides were found to have a diversified behavior with respect to oxidation. Three types of situations were observed: (i) slow “fluoridelike” oxidation, (ii) moderate speed of oxidation, (iii) “fast” oxidation. The two latter categories were found only for the Ba1-xSnxCl1+yF1-y solid solution, that has the BaClF structure, with full Ba/Sn disorder, and also disorder between y Cl and (1-y) F (for y>0), or between –y F and (1+y) Cl (for y<0). A combination of X-ray diffraction and Mössbauer spectroscopy has shown that, in the barium tin(II) chloride fluorides, the key criteria that determine the kinetics of oxidation are (i) the type of bonding (covalent or ionic), (ii) the tin(II) sublattice strength, and (iii) the method of preparation.

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