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Author |
Kiflawi, I.; Bruley, J.; Luyten, W.; Van Tendeloo, G. |
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Title |
'Natural' and 'man-made' platelets in type-la diamonds |
Type |
A1 Journal article |
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Year  |
1998 |
Publication |
Philosophical magazine: B: physics of condensed matter: electronic, optical and magnetic properties |
Abbreviated Journal |
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Volume |
78 |
Issue |
3 |
Pages |
299-314 |
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Keywords |
A1 Journal article; Electron microscopy for materials research (EMAT) |
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Abstract |
'Natural' platelets are planar defects in {001} planes found in natural type-IaA/B diamonds. 'Man-made' platelets are platelets formed in the laboratory by annealing type-IaA diamonds at temperatures over 2500 degrees C. Careful study shows that the infrared (IR) spectra of the 'man-made' platelets are different from the IR spectra of 'natural' platelets. High-temperature (T greater than or equal to 2000 degrees C) annealing of platelets containing type-IaA/B diamonds modifies the IR absorption spectrum owing to the 'natural' platelets and makes it similar to the IR spectrum of the 'man-made' platelets. It is suggested that such high-temperature annealing changes the structure of the 'natural' platelets. The changes are too subtle to be detected by electron microscopy techniques. Topographic electron-energy-loss spectroscopy shows that platelets contain nitrogen at an average density of 0.7 atoms per a(0)(2); however, high-temperature annealing does not seem to affect the concentration of the nitrogen in the platelets. |
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Place of Publication |
London |
Editor |
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Wos |
000075663700004 |
Publication Date |
2007-07-08 |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1364-2812;1463-6417; |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Impact Factor |
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Times cited |
13 |
Open Access |
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Notes |
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Approved |
Most recent IF: NA |
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Call Number |
UA @ lucian @ c:irua:25667 |
Serial |
2285 |
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Author |
Evans, T.; Kiflawi, I.; Luyten, W.; Van Tendeloo, G.; Woods, G.S. |
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Title |
Conversion of platelets into dislocation loops and voidite formation in type IaB diamonds |
Type |
A1 Journal article |
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Year |
1995 |
Publication |
Proceedings of the Royal Society of London: series A: mathematical and physical sciences |
Abbreviated Journal |
P Roy Soc A-Math Phy |
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Volume |
449 |
Issue |
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Pages |
295-313 |
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Keywords |
A1 Journal article; Electron microscopy for materials research (EMAT) |
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Abstract |
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Address |
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Corporate Author |
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Thesis |
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Publisher |
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Place of Publication |
London |
Editor |
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Language |
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Wos |
A1995QY10100007 |
Publication Date |
2006-12-18 |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1364-5021;1471-2946; |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Impact Factor |
2.192 |
Times cited |
32 |
Open Access |
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Notes |
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Approved |
COMPUTER SCIENCE, INTERDISCIPLINARY 11/104 Q1 # PHYSICS, MATHEMATICAL 1/53 Q1 # |
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Call Number |
UA @ lucian @ c:irua:13314 |
Serial |
513 |
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Author |
Woods, G.S.; Kiflawi, I.; Luyten, W.; Van Tendeloo, G. |
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Title |
Infrared spectra of type laB diamonds |
Type |
A1 Journal article |
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Year |
1993 |
Publication |
Philosophical magazine letters |
Abbreviated Journal |
Phil Mag Lett |
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Volume |
67 |
Issue |
6 |
Pages |
405-411 |
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Keywords |
A1 Journal article; Electron microscopy for materials research (EMAT) |
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Abstract |
It is shown that the infrared absorption spectra of pure type IaB diamonds, namely those that on cursory examination show only a B one-phonon component and neither A nor D, and the complete absence of a B' localized-mode platelet absorption peak, may be divided into two subgroups. The defect content of specimens of one of these subgroups has been studied before and comprises slip dislocations and voidites in random homogeneous distributions unconnected with the transformation of platelets to dislocation loops. Electron microscopy of a specimen of the other subgroup, which may be recognized by the presence of weak additional one-phonon absorption near 1100 cm-1, shows a population of dislocation loops resulting from the complete transformation of a former platelet population, plus accompanying voidites. It is suggested that the extra absorption is caused by the dislocation loops. Observation of the way in which loops and voidites are distributed suggests that voidite production and platelet transformation may not, after all, be interlinked phenomena, but parallel independent processes both promoted by the same unknown conditions. |
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Publisher |
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Place of Publication |
London |
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Language |
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Wos |
A1993LG43000007 |
Publication Date |
2007-07-08 |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0950-0839;1362-3036; |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Impact Factor |
1.087 |
Times cited |
5 |
Open Access |
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Notes |
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Approved |
no |
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Call Number |
UA @ lucian @ c:irua:6837 |
Serial |
1663 |
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| Permanent link to this record |
