Abstract
The thermolysis of fluorozirconates (M2ZrF6, M5Zr4F21 · 3H2O, MZrF5 · H2O, Rb2Zr3OF12, and Cs2Zr3F14 · 1.5H2O) and fluorosulfatozirconates (M2ZrF4SO4, Rb3Zr2F9SO4 · 2H2O, and Cs8Zr4F2(SO4)11 · 16H2O) with M = K, Rb, or Cs in undried air was studied by thermal analysis in tandem with X-ray powder diffraction. The X-ray luminescence (XRL) intensity was determined for these compounds and their thermolysis products. A mixture of Rb2Zr3OF12 and Rb2ZrF6 luminescent phases was detected in the thermolysis products of Rb5Zr4F21 · 3H2O and RbZrF5 · H2O for the first time. After heat treatment, a considerable quantum yield was observed for ZnZrF6 · 5H2O, ZnZrF6 · 6H2O, and ZnZr2F10 · 7H2O. The XRL luminescence was affected by the composition of the phase and the density of excited states (F* and O*).
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