From: LARRY KLAES (ljk4_at_msn.com)
Date: Fri Mar 02 2007 - 08:59:25 PST
Physics, abstract
physics/0608014
From: Jozsef Garai [view email]
Date (v1): Wed, 2 Aug 2006 19:58:35 GMT (152kb)
Date (revised v2): Fri, 27 Oct 2006 20:11:19 GMT (271kb)
Infrared Absorption Investigations Confirm the Extraterrestrial Origin of
Carbonado-Diamonds
Authors: Jozsef Garai, Stephen E. Haggerty, Sandeep Rekhi, Mark Chance
Subj-class: Space Physics
Journal-ref: The Astrophysical Journal, 653: L153-L156, 2006
The first complete infrared FTIR absorption spectra for carbonado-diamond
confirm the interstellar origin for the most enigmatic diamonds known as
carbonado. All previous attempts failed to measure the absorption of
carbonado-diamond in the most important IR-range of 1000-1300 cm-1
(10.00-7.69 micro-m.) because of silica inclusions. In our investigation,
KBr pellets were made from crushed silica-free carbonado-diamond and thin
sections were also prepared. The 100 to 1000 times brighter synchrotron
infrared radiation permits a greater spatial resolution. Inclusions and pore
spaces were avoided and/or sources of chemical contamination were removed.
The FTIR spectra of carbonado-diamond mostly depict the presence of single
nitrogen impurities, and hydrogen. The lack of identifiable nitrogen
aggregates in the infrared spectra, the presence of features related to
hydrocarbon stretch bonds, and the resemblance of the spectra to CVD and
presolar diamonds indicate that carbonado-diamonds formed in a hydrogen-rich
interstellar environment. This is consistent with carbonado-diamond being
sintered and porous, with extremely reduced metals, metal alloys, carbides
and nitrides, light carbon isotopes, surfaces with glassy melt-like patinas,
deformation lamellae, and a complete absence of primary, terrestrial mineral
inclusions. The 2.6-3.8 billion year old fragmented body was of asteroidal
proportions.
http://arxiv.org/abs/physics/0608014
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