Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!swrinde!elroy.jpl.nasa.gov!decwrl!stanford.edu!rutgers!aramis.rutgers.edu!athos.rutgers.edu!nanotech From: cphoenix@elaine25.stanford.edu (Chris Phoenix) Newsgroups: sci.nanotech Subject: Re: Diamonds? Keywords: diamonds, bones Message-ID: Date: 9 Apr 91 02:38:20 GMT Sender: nanotech@athos.rutgers.edu Organization: AIR, Stanford University Lines: 15 Approved: nanotech@aramis.rutgers.edu In article erich@eecs.cs.pdx.edu (Erich Stefan Boleyn) writes: > Not necessarily. Consider how diamond is produced... the intense >temperatures and pressures are necessary because there is inherently a large >energy input required to produce diamond. If you look at the chemical >reaction, the activation energy is large, but there is no product energy, >and since the energy required is so large, it is very slow. Diamond does not require large temperatures or pressures. See Discover, March 91 (V. 12 #3) p. 66, "Diamonds in the Rough" by Ed Regis. John Angus has caused seed crystals to grow larger and incorporate boron by passing methane gas heated to 1800 degrees over them. With boron in the gas, the diamonds turned blue. He has also replicated Yoichi Hirosi's work, making diamonds by using an oxyacetylene welder's torch, aimed at a molybdenum disc on a water-cooled copper block. The diamonds form without seed crystals.