Polymorphic transformations and thermal expansion of some modifications in Ag1.5Cu0.5Se and Ag0.4Cu1.6Se

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istinad üçün kopyala

Aliyev Y., Asadov Y., Dashdemirov A., Aliyeva R., Naghiyev T., Jabarov S.

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, vol.33, no.23, pp.1-7, 2019 (SCI-Expanded)

• Nəşrin Növü: Article / Article
• Cild: 33 Say: 23
• Nəşr tarixi: 2019
• Doi nömrəsi: 10.1142/s0217979219502710
• jurnalın adı: INTERNATIONAL JOURNAL OF MODERN PHYSICS B
• Jurnalın baxıldığı indekslər: Science Citation Index Expanded (SCI-EXPANDED), Scopus
• Səhifə sayı: pp.1-7
• Adres: Yox

Qısa məlumat

The Ag1.5" role="presentation" >1.5${}_{1.5}$Cu0.5" role="presentation" >0.5${}_{0.5}$Se and Ag0.4" role="presentation" >0.4${}_{0.4}$Cu1.6" role="presentation" >1.6${}_{1.6}$Se compounds have been synthesized and grown as single crystals. High-temperature X-ray diffraction method was used to study polymorphic transformations. It is shown that the Ag1.5" role="presentation" >1.5${}_{1.5}$Cu0.5" role="presentation" >0.5${}_{0.5}$Se crystals of high-temperature FCC modification are decomposed into Ag2Se and AgCuSe when the temperature decreases below T = 488 K and Ag0.4" role="presentation" >0.4${}_{0.4}$Cu1.6" role="presentation" >1.6${}_{1.6}$Se is decomposed into Cu2Se and AgCuSe when the temperature decreases below T = 540 K. Transformations in both compounds are reversible. Crystalline parameters are obtained and the temperature dependence of the lattice parameters for each phase is built.