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'Tetracarbon', 40 times harder than diamond?
It's referred to as "polyyne" he
Polyyne said to be 40 times harder than diamond. http://www.foresight.org/nanodot/?p=2111 The research is published he Harder than Diamond: Determining the Cross-Sectional Area and Young's Modulus of Molecular Rods. Angewandte Chemie International Edition, Volume 44, Issue 45, Pages 7315-7483 (November 18, 2005). http://www3.interscience.wiley.com/c...30826/ABSTRACT The research actually only calculated Young's modulus. It didn't measure it. Also the hardness claim is coming from the fact the calculated Young's modulus was 40 times that of diamond, and hardness is correlated to Young's modulus. Bob Clark |
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'Tetracarbon', 40 times harder than diamond?
Robert Clark wrote:
It's referred to as "polyyne" he Polyyne said to be 40 times harder than diamond. http://www.foresight.org/nanodot/?p=2111 The research is published he Harder than Diamond: Determining the Cross-Sectional Area and Young's Modulus of Molecular Rods. Angewandte Chemie International Edition, Volume 44, Issue 45, Pages 7315-7483 (November 18, 2005). http://www3.interscience.wiley.com/c...30826/ABSTRACT The research actually only calculated Young's modulus. It didn't measure it. Also the hardness claim is coming from the fact the calculated Young's modulus was 40 times that of diamond, and hardness is correlated to Young's modulus. Bob Clark Let's ask a simple low-tech question: Are Israeli diamond cutters lining up to put it on their wheels? -- Uncle Al http://www.mazepath.com/uncleal/ (Toxic URL! Unsafe for children and most mammals) http://www.mazepath.com/uncleal/qz3.pdf |
#3
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'Tetracarbon', 40 times harder than diamond?
In sci.physics, Uncle Al
wrote on Fri, 08 Sep 2006 14:32:11 -0700 : Robert Clark wrote: It's referred to as "polyyne" he Polyyne said to be 40 times harder than diamond. http://www.foresight.org/nanodot/?p=2111 The research is published he Harder than Diamond: Determining the Cross-Sectional Area and Young's Modulus of Molecular Rods. Angewandte Chemie International Edition, Volume 44, Issue 45, Pages 7315-7483 (November 18, 2005). http://www3.interscience.wiley.com/c...30826/ABSTRACT The research actually only calculated Young's modulus. It didn't measure it. Also the hardness claim is coming from the fact the calculated Young's modulus was 40 times that of diamond, and hardness is correlated to Young's modulus. Bob Clark Let's ask a simple low-tech question: Are Israeli diamond cutters lining up to put it on their wheels? I also seem to recall -- don't remember the details now -- of a theoretical explosive that basically fizzled. Something tells me we have a long way to go before predictive chemistry becomes the norm. :-) In any event diamond's crystal structure is a very interesting and regular pattern; I doubt it can really be improved upon using pure carbon. -- #191, Windows Vista. Because it's time to refresh your hardware. Trust us. |
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'Tetracarbon', 40 times harder than diamond?
The Ghost In The Machine (or somebody else of the same name) wrote thusly in
message : I also seem to recall -- don't remember the details now -- of a theoretical explosive that basically fizzled. Something tells me we have a long way to go before predictive chemistry becomes the norm. :-) Octanitrocubane C8(NO2)8 is predicted to be a more powerful explosive than most of what the military are using now, and safer to handle. Predicted. Up till now nobody has got more than two nitro's onto the cubane nucleus. If "polyyne" is really -C≡C-C≡C- (that's alternate single and triple bonds between the carbons in case the character doesn't come out) I can't see how it can be stable - the triple bond is not "the strongest" bond but the most reactive. Also the linear structure would be strong in one dimension only giving the stuff a fibrous texture. -- Warning: keel away from child for hot bulb Interchange the alphabetic letter groups to reply |
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'Tetracarbon', 40 times harder than diamond?
Uncle Al wrote: Robert Clark wrote: It's referred to as "polyyne" he Polyyne said to be 40 times harder than diamond. http://www.foresight.org/nanodot/?p=2111 The research is published he Harder than Diamond: Determining the Cross-Sectional Area and Young's Modulus of Molecular Rods. Angewandte Chemie International Edition, Volume 44, Issue 45, Pages 7315-7483 (November 18, 2005). http://www3.interscience.wiley.com/c...30826/ABSTRACT The research actually only calculated Young's modulus. It didn't measure it. Also the hardness claim is coming from the fact the calculated Young's modulus was 40 times that of diamond, and hardness is correlated to Young's modulus. Bob Clark Let's ask a simple low-tech question: Are Israeli diamond cutters lining up to put it on their wheels? That''s doesn't really matter. Since Israeli diamond cutters are the most proton-ignorant Swahili retards to visit Earth since Bill Clonton. -- Uncle Al http://www.mazepath.com/uncleal/ (Toxic URL! Unsafe for children and most mammals) http://www.mazepath.com/uncleal/qz3.pdf |
#6
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'Tetracarbon', 40 times harder than diamond?
wrote in message
ups.com... Robert Clark wrote: ====Tetracarbon', 40 times harder than diamond?] It's referred to as "polyyne" here [@ Technion, Israel] Polyyne said to be 40 times harder than diamond. http://www.foresight.org/nanodot/?p=2111 Harder than Diamond: Determining the Cross-Sectional Area and Young's Modulus of Molecular Rods. Angewandte Chemie International Edition, Volume 44, Issue 45, Pages 7315-7483 (November 18, 2005). http://www3.interscience.wiley.com/c...30826/ABSTRACT The research actually only calculated Young's modulus. It didn't measure it. Also the hardness claim is coming from the fact the calculated Young's modulus was 40 times that of diamond, and hardness is correlated to Young's modulus. -- Bob Clark "Prai Jei" wrote in message ... If "polyyne" is really -C?C-C?C- (that's alternate single and triple bonds between the carbons in case the character doesn't come out) I can't see how it can be stable - the triple bond is not "the strongest" bond but the most reactive. Also the linear structure would be strong in one dimension only giving the stuff a fibrous texture. [Uncle Al] Let's ask a simple low-tech question: Are Israeli diamond cutters lining up to put it on their wheels? [zzgunker] That''s doesn't really matter. Since Israeli diamond cutters are the most proton-ignorant Swahili retards to visit Earth since Bill Clonton. [hanson] ...... ahahahaha... zz, don't get so extra terrestrial ... If Al is right then it's simply another Jewish game of cons conning cons. ------------------ [Interesting side note] ----------------- "Prai Jei" wrote in message ... Octanitrocubane C8(NO2)8 is predicted to be a more powerful explosive than most of what the military are using now, and safer to handle. Predicted. Up till now nobody has got more than two nitro's onto the cubane nucleus. [hanson] Why is that? Steric hindrance or e-charge rejection? The analog aromatic C6(NO2)6 is known, so is the aliphatic C(NO2)4 ------------------ [Interesting side note] ----------------- -- Uncle Al : http://www.mazepath.com/uncleal/qz3.pdf [hanson] I notice that your qz3.pdf is dated 15-Jan-06. So, Al, what happened to that Eotvoes/Chirality/Gravitation project since then? How is that Chinese situation going/coming along? Do you have any other irons in the fire for it? hanson |
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'Tetracarbon', 40 times harder than diamond?
hanson wrote: wrote in message ups.com... Robert Clark wrote: ====Tetracarbon', 40 times harder than diamond?] It's referred to as "polyyne" here [@ Technion, Israel] Polyyne said to be 40 times harder than diamond. http://www.foresight.org/nanodot/?p=2111 Harder than Diamond: Determining the Cross-Sectional Area and Young's Modulus of Molecular Rods. Angewandte Chemie International Edition, Volume 44, Issue 45, Pages 7315-7483 (November 18, 2005). http://www3.interscience.wiley.com/c...30826/ABSTRACT The research actually only calculated Young's modulus. It didn't measure it. Also the hardness claim is coming from the fact the calculated Young's modulus was 40 times that of diamond, and hardness is correlated to Young's modulus. -- Bob Clark "Prai Jei" wrote in message ... If "polyyne" is really -C?C-C?C- (that's alternate single and triple bonds between the carbons in case the character doesn't come out) I can't see how it can be stable - the triple bond is not "the strongest" bond but the most reactive. Also the linear structure would be strong in one dimension only giving the stuff a fibrous texture. [Uncle Al] Let's ask a simple low-tech question: Are Israeli diamond cutters lining up to put it on their wheels? [zzgunker] That''s doesn't really matter. Since Israeli diamond cutters are the most proton-ignorant Swahili retards to visit Earth since Bill Clonton. [hanson] ..... ahahahaha... zz, don't get so extra terrestrial ... If Al is right then it's simply another Jewish game of cons conning cons. Well, that's always the way it's going to be with commercial diamonds. since the only thing they're even used for is cutting other diamonds. Most of us figured even people as stupid as Israels, Egyptians, Africans, Australians, Mexicans, Jimmy Carter, and moron Europeans would figure it out sonner or later. But since it's industrial diamands that you use to make stealth titanium, the only thing that really still surprises us about Jews is that the Swiss still haven't foreclosed on all the Africans yet. ------------------ [Interesting side note] ----------------- "Prai Jei" wrote in message ... Octanitrocubane C8(NO2)8 is predicted to be a more powerful explosive than most of what the military are using now, and safer to handle. Predicted. Up till now nobody has got more than two nitro's onto the cubane nucleus. [hanson] Why is that? Steric hindrance or e-charge rejection? The analog aromatic C6(NO2)6 is known, so is the aliphatic C(NO2)4 ------------------ [Interesting side note] ----------------- -- Uncle Al : http://www.mazepath.com/uncleal/qz3.pdf [hanson] I notice that your qz3.pdf is dated 15-Jan-06. So, Al, what happened to that Eotvoes/Chirality/Gravitation project since then? How is that Chinese situation going/coming along? Do you have any other irons in the fire for it? hanson |
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'Tetracarbon', 40 times harder than diamond?
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'Tetracarbon', 40 times harder than diamond?
Uncle Al wrote: Robert Clark wrote: It's referred to as "polyyne" he Polyyne said to be 40 times harder than diamond. http://www.foresight.org/nanodot/?p=2111 The research is published he Harder than Diamond: Determining the Cross-Sectional Area and Young's Modulus of Molecular Rods. Angewandte Chemie International Edition, Volume 44, Issue 45, Pages 7315-7483 (November 18, 2005). http://www3.interscience.wiley.com/c...30826/ABSTRACT The research actually only calculated Young's modulus. It didn't measure it. Also the hardness claim is coming from the fact the calculated Young's modulus was 40 times that of diamond, and hardness is correlated to Young's modulus. Bob Clark Let's ask a simple low-tech question: Are Israeli diamond cutters lining up to put it on their wheels? What's the crystal shape? Abrasives need to be sharp as well as hard. |
#10
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'Tetracarbon', 40 times harder than diamond?
Isn't diamond _already_ tetra?
Bret Cahill |
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