Special points on the phase diagrams of langbeinites. The case of (x, T)-phase diagram of mixed K2xRb2(1-x)Cd2(SO4)3 crystals

被引：0

作者：

Zapeka, Bohdan ^{[1
]}

Say, Andriy ^{[1
]}

Vlokh, Oxana ^{[1
]}

Kostyrko, Myroslav ^{[1
]}

Martynyuk-Lototska, Iryna ^{[1
]}

Vlokh, Rostyslav ^{[1
]}

机构：

[1] Vlokh Inst Phys Opt, Lvov, Ukraine

来源：

PHASE TRANSITIONS | 2015年 / 88卷 / 02期

关键词：

domain structure; phase diagrams; special points; langbeinite crystals; TRANSITIONS;

D O I：

10.1080/01411594.2014.971324

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

We have studied special points that appear on the (x, T)-phase diagram of mixed K2xRb2(1-x)Cd2(SO4)(3) crystals. This phase diagram has been constructed issuing from the changes in domain structure occurring in the course of phase transitions. We have found that two triple points on the (x, T)-phase diagram of the above solid solutions are very close to each other in the phase space and can change their places or transform into a quadruple point. These special points are associated with disappearance of ferroelectric phases with the symmetries P1 and P2(1) taking place when Rb-2(+) are substituted with K-2(+) ions.

引用

页码：192 / 200

页数：9

共 20 条

[1]

Anthony J.W., 2004, Handbook of Mineralogy

[2]

BREZINA B, 1984, FERROELECTRICS, V55, P177

[3] STRUCTURAL PHASE-TRANSITIONS IN LANGBEINITES [J].