TWINNING DISLOCATIONS IN HEMATITE IRON-ORE

被引：25

作者：

BURSILL, LA

WITHERS, RL

机构：

[1] School of Physics University of Melbourne, Parkville, VIC

来源：

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES | 1979年 / 40卷 / 02期

基金：

澳大利亚研究理事会;

关键词：

D O I：

10.1080/01418617908243099

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Direct observation of twinning dislocations at rhombohedral twin interfaces in naturally deformed haematite ore is reported. An analysis of the coordination polyhedra produced by the operation of the observed twinning elements across {1012} composition planes leads to a simple description of the interface structure whereby Fo atoms occupy tetrahedrally coordinated sites. Simple displacive atomic movements allow for rapid propagation of the twinning dislocations. The structural results are also relevant to mechanical twinning of sapphire and other structures derived from hexagonal close-packing, including hexagonal metals and alloys. © 1979 Taylor & Francis Group, LLC.

引用

页码：213 / 232

页数：20

共 14 条

[1] TWINNING ON UNIT-CELL LEVEL AS A STRUCTURE-BUILDING OPERATION IN SOLID-STATE [J].