HIGH-PRESSURE NEUTRON-DIFFRACTION STUDIES OF KH2PO4-TYPE PHASE-TRANSITIONS AS TC TENDS TO 0K

被引：35

作者：

NELMES, RJ

MCMAHON, MI

PILTZ, RO

WRIGHT, NG

机构：

[1] Department of Physics, University of Edinburgh, Edinburgh

来源：

FERROELECTRICS | 1991年 / 124卷 / 1-4期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1080/00150199108209465

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A neutron-diffraction study has been carried out on KH2PO4 at 16. 5kbars and 10K, close to the point at which the transition temperature, Tc, falls to OK at 17. 1kbars. The results suggest that under these conditions, the H atoms are still disordered over two sites with a separation, S, of 0. 22(2) A. Comparison with results from previous structural studies of other other H-bonded systems suggests that Tc is linearly related to S in each case and that each system has the same critical value of 6 as Tc → 0K. © 1991, Taylor & Francis Group, LLC. All rights reserved.

引用

收藏

页码：355 / 360

页数：6

相关论文

共 10 条

[1] HIGH-PRESSURE EQUATION OF STATE FOR NACL, KCL, AND CSCL [J].

DECKER, DL .

JOURNAL OF APPLIED PHYSICS, 1971, 42 (08) :3239-&

[2] SIGNIFICANCE TESTS ON CRYSTALLOGRAPHIC R FACTOR [J].

HAMILTON, WC .

ACTA CRYSTALLOGRAPHICA, 1965, 18 :502-&

[3] ESTIMATING THE PROTON POTENTIAL IN KDP FROM INFRARED AND CRYSTALLOGRAPHIC DATA [J].

LAWRENCE, MC ;

ROBERTSON, GN .

FERROELECTRICS, 1981, 34 (04) :179-186

[4]

LAWRENCE MC, 1980, J PHYS C SOLID STATE, V13, P1053

[5] STRUCTURAL STUDIES OF KDP AND THE KDP-TYPE TRANSITION BY NEUTRON AND X-RAY-DIFFRACTION - 1970-1985 [J].

NELMES, RJ .

FERROELECTRICS, 1987, 71 (1-4) :87-123

[6] NEUTRON-DIFFRACTION STUDIES OF THE GEOMETRIC ISOTOPE EFFECT IN H-ORDERING TRANSITIONS [J].

PILTZ, RO ;

MCMAHON, MI ;

NELMES, RJ .

FERROELECTRICS, 1990, 108 :271-276

[7] ENERGY-DISPERSIVE X-RAY-DIFFRACTION WITH SYNCHROTRON RADIATION AT CRYOGENIC TEMPERATURES [J].

SKELTON, EF ;

WEBB, AW ;

QADRI, SB ;

WOLF, SA ;

LACOE, RC ;

FELDMAN, JL ;

ELAM, WT ;

CARPENTER, ER ;

HUANG, CY .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1984, 55 (06) :849-855

[8] THE P-T DEPENDENCE OF THE CRYSTAL-STRUCTURE OF KDP AND DKDP ABOVE TC [J].

TIBBALLS, JE ;

NELMES, RJ .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1982, 15 (25) :L849-L853

[9]

TOKUNAGA M, 1987, FERROELECTRICS, V72, P175

[10] PROMETHEUS - A PROGRAM SYSTEM FOR INVESTIGATION OF ANHARMONIC THERMAL VIBRATIONS IN CRYSTALS [J].

ZUCKER, UH ;

PERENTHALER, E ;

KUHS, WF ;

BACHMANN, R ;

SCHULZ, H .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1983, 16 (JUN) :358-358