PHASE-TRANSITION AT 240-K IN C-70 SINGLE-CRYSTAL

被引：20

作者：

MEINGAST, C

GUGENBERGER, F

HALUSKA, M

KUZMANY, H

ROTH, G

机构：

[1] KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH,ITP,W-7500 KARLSRUHE 1,GERMANY

[2] UNIV VIENNA,INST FESTKORPERPHYS,A-1090 VIENNA,AUSTRIA

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 1993年 / 56卷 / 03期

关键词：

D O I：

10.1007/BF00539479

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The thermal expansion of single- and polycrystalline C70 is studied between 5 and 315 K using an ultra-high-resolution capacitance dilatometer. We observe a first-order phase transition in single crystalline C70 at almost-equal-to 240 K and a transition at almost-equal-to 280 K in polycrystalline C70. X-ray diffraction measurements at 300 K show that the C70 single crystal has fcc symmetry, whereas the polycrystalline sample is multiphase (fcc and hcp). The results are compared to thermal expansion measurements of solid C60.

引用

页码：227 / 229

页数：3

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