STRUCTURE STABILIZATION - LOCKING-IN FAST CATION CONDUCTIVITY PHASE IN TII

被引：18

作者：

SECCO, EA

SHARMA, A

机构：

[1] Department of Chemistry, St Francis Xavier University, Antigonish, NS B2G 2W5

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1995年 / 56卷 / 02期

关键词：

DIFFERENTIAL SCANNING CALORIMETRY (DSC); ELECTRICAL CONDUCTIVITY; PHASE TRANSITIONS;

D O I：

10.1016/0022-3697(94)00172-3

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The a.c. electrical conductivity vs temperature and differential scanning calorimetry plots of K(x)Tl(l-x)I and Cs(x)Ti(l-x)I for 0 less-than-or-equal-to x less-than-or-equal-to 0.13 are reported. The high conductivity alpha-phase of TlI was preserved at room temperature by incorporating 7.5 mol% CsI in the TlI lattice whereas no such effect was observed for up to 13.0 mol% KI in TlI. The conductivity data and Q(c) values, while sensitive to sample history, pretreatment and compostion, show reproducibility. The mechanism for stabilization of the alpha-TlI CsCl structure is interpreted in terms of stronger bonding between the more electropositive Cs+ and I- than that between Tl+ and I- consistent with the earlier interpretation for similar behavior observed with Rb+ in TlI.

引用

页码：251 / 254

页数：4

共 10 条

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