Ferroelastic phase transitions in the K3Na(SeO4)(2) glaserit-type crystal

被引：16

作者：

DiazHernandez, J ^{[1
]}

Manes, JL ^{[1
]}

Tello, MJ ^{[1
]}

LopezEcharri, A ^{[1
]}

Breczewski, T ^{[1
]}

RuizLarrea, I ^{[1
]}

机构：

[1] UNIV BASQUE COUNTRY, FAC CIENCIAS, DEPT FIS APLICADA 2, E-48080 BILBAO, SPAIN

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.53.14097

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Successive structural phase transitions in K3Na(SeO4)(2) at T-c approximate to 329 K and T-0 approximate to 346 K were studied by adiabatic calorimetry, thermal expansion, linear birefringence, differential scanning calorimetry, and optical observations of domains. The experimental results in this paper together with x-ray and elastic measurements in the literature are interpreted by means of a theoretical model based on the Landau phenomenological approach. This model gives a P (3) over bar m1 346 K under right arrow B2/m 329 K under right arrow C2/c phase transition sequence with second (346 K) and first (329 K) character, respectively. Because of histeresis effects, the intermediate phase tends to appear as a mixture of both monoclinic phases.

引用

页码：14097 / 14102

页数：6

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