|
Title
|
|
|
|
'Natural' and 'man-made' platelets in type-la diamonds
|
|
|
Author
|
|
|
|
|
|
|
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. |
|
|
|
Language
|
|
|
|
English
|
|
|
Source (journal)
|
|
|
|
Philosophical magazine: B: physics of condensed matter: electronic, optical and magnetic properties. - London, 1978 - 2002
|
|
|
Publication
|
|
|
|
London
:
1998
|
|
|
ISSN
|
|
|
|
1364-2812
0141-8637
0958-6644
|
|
|
DOI
|
|
|
|
10.1080/13642819808205733
|
|
|
Volume/pages
|
|
|
|
78
:3
(1998)
, p. 299-314
|
|
|
ISI
|
|
|
|
000075663700004
|
|
|
Full text (Publisher's DOI)
|
|
|
|
|
|