Könyv RAMAN STUDY OF THE Ag8W40l6 IN THE SUPERIONIC SYSTEM  AgI + Ag8W40l6 Aleksandra Turkovi

RAMAN STUDY OF THE Ag8W40l6 IN THE SUPERIONIC SYSTEM AgI + Ag8W40l6

Nyelv: Angol
Kötés: Puha kötésű
Elérhetőség: Kiadói készleten rendelésre
Küldés 17-27 napon belül
24 415 Ft
Polarized Raman spectra have been obtained on §oriented single crystals of Ag8W40l6 from 293 K §to t...

Információk a könyvről

Nyelv
Angol
Kötés
Könyv - Puha kötésű
Kiadva
2009
oldal
172
EAN
9783836475419
Enbook ID
07119715
Súly
272
Méretek
150 x 220 x 10

Teljes leírás

Polarized Raman spectra have been obtained on §oriented single crystals of Ag8W40l6 from 293 K §to the melting point (893 K) and also of the melt, §both in air in an oxygen atmosphere. The temperature §dependences of the low-frequency Ag+-ion vibrations §show no anomalies, in contrast to those in solid §electrolytes such as -AgI. Polarization versus §temperature measurements have been made on the §crystals under the same conditions as the Raman §measurements. The results indicate that there is §decomposition of the crystals in air which produces §conducting phase irreversibly. The oxygen atmosphere §impedes this decomposition and the (W40l6)8- ions §continue to be noncentrosymmetric in the §melt. Results of measurements of electrical §conductivity of single crystals of Ag26I18W40l6 in §the emperature range 473-175 K show existence of two §first order transitions at 246 and 197 K; At 298 K §the average conductivity, 0.0825 ( cm)-l,is 1.4 §times the best value obtained from conductivity §measurements on po1ycrystalline material.

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