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Are crystalline C‐(H‐O‐N) carbons the elusive meteoritic carbynes?
Author(s) -
Rietmeijer Frans J. M.
Publication year - 1993
Publication title -
meteoritics
Language(s) - English
Resource type - Journals
eISSN - 1945-5100
pISSN - 0026-1114
DOI - 10.1111/j.1945-5100.1993.tb00763.x
Subject(s) - carbyne , metastability , carbon fibers , pyrolysis , chemistry , mineralogy , chemical engineering , crystallography , materials science , organic chemistry , catalysis , composite number , engineering , carbene , composite material
I present an internally consistent reinterpretation of carbyne diffraction data making a few plausible assumptions. The results support that carbynes could be crystalline, randomly interstratified (or mixed‐layered) carbons with variable C/(C+H+O+N) ratios rather than thermodynamically stable carbon allotropes. The metastable carbynes are likely the result of incomplete, kinetically‐inhibited, low‐temperature pyrolysis of precursor material. A renewed interest in meteoritic carbynes should seek to combine light‐element chemistry and crystallography of these elusive carbons.