TY - JOUR
T1 - Cathodoluminescence of brown diamonds as observed by transmission electron microscopy
AU - Graham, R. J.
AU - Buseck, P R
N1 - Funding Information:
We thank E. Fritsch and J. Schiegle of the Gemological Institute of America, and D. N. Robinson of De Beers, Ltd., for providing us with the brown diamonds. The help of J. K. Weiss in instrumental development of the data acquisition system is gratefully acknowledged. This study was supported in part by National Science Foundation Grant No. EAR-9219376. The electron microscopy used for this research was performed at the Center for High Resolution Electron Microscopy, at Arizona State University, established with support from the National Science Foundation (Grant No. DMR-89-13384).
PY - 1994/12
Y1 - 1994/12
N2 - Cathodoluminescing features in brown diamonds correlate with the crystalline microstructure as observed by transmission electron microscopy. We identified distinctive emissions at 415·3, 425, 491·3 and 525 nm. The first two correlate with the so-called N3 and band-A emissions, while the last correlates with what is called a strain-broadened H3 band. The N3 emission is associated with stacking faults on (111) planes. H3 emission is correlated with straight dislocations and dislocation tangles. The 491·3 nm and H3 emissions suggest that the diamonds have undergone severe plastic deformation, which may have also contributed to the apparent high concentrations of the N3 defects.
AB - Cathodoluminescing features in brown diamonds correlate with the crystalline microstructure as observed by transmission electron microscopy. We identified distinctive emissions at 415·3, 425, 491·3 and 525 nm. The first two correlate with the so-called N3 and band-A emissions, while the last correlates with what is called a strain-broadened H3 band. The N3 emission is associated with stacking faults on (111) planes. H3 emission is correlated with straight dislocations and dislocation tangles. The 491·3 nm and H3 emissions suggest that the diamonds have undergone severe plastic deformation, which may have also contributed to the apparent high concentrations of the N3 defects.
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U2 - 10.1080/01418639408240282
DO - 10.1080/01418639408240282
M3 - Article
AN - SCOPUS:0000788552
SN - 1364-2812
VL - 70
SP - 1177
EP - 1185
JO - Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
JF - Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
IS - 6
ER -