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Unusual morphological features of natural diamond samples characterized with Micro Raman Spectroscopy
Author(s) -
Sachdev Hermann,
Kramlich Erwin
Publication year - 2006
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200671130
Subject(s) - diamond , nucleation , raman spectroscopy , crystallite , material properties of diamond , chemical vapor deposition , chemical engineering , hydrothermal circulation , materials science , crystal growth , spectroscopy , chemistry , analytical chemistry (journal) , mineralogy , crystallography , nanotechnology , metallurgy , optics , chromatography , physics , organic chemistry , engineering , quantum mechanics
In the present study, unusual morphological features of natural diamonds were characterized by Micro Raman Spectroscopy. The growth of diamond crystallites through secondary nucleation was observed in microscopic cracks in natural specimens. The protrusion of small gaps in the diamond crystal by the growth medium was leading to the formation of 2 nd and higher generation crystallites without the deposition of additional phases. This fact clearly indicates that a highly mobile and volatile flux system has to be held responsible for the secondary diamond growth. Specific features of natural diamond samples can be interpreted as growth forms from volatile or highly mobile liquid species in the C–H–O‐system, thus merging CVD and hydrothermal conditions in the latter system. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)