This points to a decomposition of the KHS crystal and a multiphase state formation at T I = 480 K, rather than at superprotonic phase transition, which is typical for the majority of compounds of the M 3H(XO 4) 2 type. Temperature Range Cooling Device Gas +50 to +100 o C None Nitrogen +20 to +50 o. The EPR spectra of KHS doped with VO 2+ or Mn 2+ are rapidly changed into the pseudo-powder ones after annealing above T I = 480 K. not hesitate to contact your nearest BRUKER dealer or contact us directly at: BRUKER BioSpin AG Industriestrasse 26 CH-8117 Fällanden Switzerland Phone: + 41 FAX: + 41 E-mail: servicebruker. The angular dependence of EPR spectra indicates that K 3H(SO 4) 2 undergoes a ferroelastic phase transition between the point groups 2/m and 3 ¯ m.
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The formation of a multidomain state upon heating below T II is manifested as irreversible changes in EPR spectra after sample cooling to room temperature. Sotib olish Portable Practical Functional Host Base Cooler High Rotation Speed Cool Down Quickly External Cooling Fan for Switch OLED Game Console Zoodmall Tez va bepul etkazib berish Rasmiy kafolat Tolov. 54.3 MHz) spectrometer, equipped with a Bruker BVT3000 temperature control unit. EPR spectra of K 3H(SO 4) 2 (KHS) doped with VO 2+ or Mn 2+ recorded at the temperature higher than about 440 K are time-dependent and indicate on anomalously slow kinetics of the paraelastic/ferroelastic phase transition which takes place far below the temperature proposed by Baranov et al. (298kex 6.5 x106 s-1) and slightly faster than on Gd(DOTA)H2O.
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