Synthesis and Characterization of a H⁺ Exchanged Zirconate.

Abstract

Zirconium I 4400 Synthesis and Characterization of a H + Exchanged Zirconate. -Complete ion exchange of Li + by H + in lithium metazirconate, Li2ZrO3, is achieved in acidic medium (5M aq. HNO3, 80°C, 24 h). Characterization of the protonated solid by means of powder XRD and TGA allows to propose the nominal formulation H2ZrO3. However vibrational spectroscopy suggests that a more appropriate formulation would be ZrO(OH)2. -(ORERA*, A.; KUHN, A.; GARCIA ALVARADO, F.; Z. Anorg. Allg. Chem. 631 (

Crystal structure of a new HfO(OH)2 oxyhydroxide

“…However, in our recent studies it has been shown that the use of an ion exchange reaction with Li 2 HfO 3 as a precursor allows to synthesize a crystalline HfO(OH) 2 compound as an individual phase (Baklanova et al, 2011). In the same way, other oxyhydroxides from the IVB group of the periodic table (TiO(OH) 2 and ZrO(OH) 2 ) have been synthesized and their physicochemical properties have been studied recently (Baklanova et al, 2011;Orera et al, 2005;Denisova et al, 2006;Yawata, 2006;Tarakina et al, 2010a;Tarakina et al, 2010b;Tarakina et al, 2011). However, only the crystal structure of TiO(OH) 2 has been described (Tarakina et al, 2010a;Tarakina et al, 2010b;Tarakina et al, 2011).…”