COMPOSITIONAL VARIATIONS IN APATITES WITH RESPECT TO PREFERENTIAL IONIC EXTRACTION

被引：18

作者：

CUISINIER, FJG

GLAISHER, RW

VOEGEL, JC

HUTCHISON, JL

BRES, EF

FRANK, RM

机构：

[1] UNIV SYDNEY,ELECTRON MICROSCOPE UNIT,SYDNEY,NSW 2006,AUSTRALIA

[2] UNIV OXFORD,DEPT MET & SCI MAT,OXFORD OX1 3PH,ENGLAND

来源：

ULTRAMICROSCOPY | 1991年 / 36卷 / 04期

关键词：

D O I：

10.1016/0304-3991(91)90122-M

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

Detection of ionic losses from the apatitic structure (Ca10(PO4)6(OH)2) by high-resolution electron microscopy was investigated theoretically. Linear image analysis showed the need for an objective aperture of at least 3.7 nm-1 to visualize four different coordinates (Ca II, OH-, P and mid-point between Ca II-P bond). High-resolution image analysis and plotting of OH- column intensity against specimen thickness showed an inverse proportionality between composition and OH- image intensities for very thin specimens (less than 2 nm). Image intensity variation would be detectable experimentally, but the preparation of such thin specimens by ultramicrotomy is impossible.

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页码：297 / 305

页数：9

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