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'Tetracarbon', 40 times harder than diamond?



 
 
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  #1  
Old September 8th 06, 07:35 PM posted to sci.astro,sci.physics,sci.energy,sci.materials,sci.chem
Robert Clark
external usenet poster
 
Posts: 1,150
Default '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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  #2  
Old September 8th 06, 10:32 PM posted to sci.astro,sci.physics,sci.energy,sci.materials,sci.chem
Uncle Al
external usenet poster
 
Posts: 697
Default '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  
Old September 9th 06, 05:00 AM posted to sci.astro,sci.physics,sci.energy,sci.materials,sci.chem
The Ghost In The Machine
external usenet poster
 
Posts: 546
Default '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.
  #4  
Old September 9th 06, 09:06 AM posted to sci.astro,sci.physics,sci.chem
Prai Jei
external usenet poster
 
Posts: 42
Default '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
  #5  
Old September 9th 06, 10:47 AM posted to sci.astro,sci.physics,sci.energy,sci.materials,sci.chem
[email protected]
external usenet poster
 
Posts: 240
Default '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  
Old September 9th 06, 10:23 PM posted to sci.astro,sci.physics,sci.energy,sci.materials,sci.chem
hanson
external usenet poster
 
Posts: 2,934
Default '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




  #7  
Old September 10th 06, 01:10 AM posted to sci.astro,sci.physics,sci.energy,sci.materials,sci.chem
Father Haskell
external usenet poster
 
Posts: 118
Default '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.

  #8  
Old September 10th 06, 01:40 AM posted to sci.astro,sci.physics,sci.energy,sci.materials,sci.chem
[email protected]
external usenet poster
 
Posts: 240
Default '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


  #9  
Old September 10th 06, 02:54 AM posted to sci.astro,sci.physics,sci.energy,sci.materials,sci.chem
Bret Cahill
external usenet poster
 
Posts: 29
Default 'Tetracarbon', 40 times harder than diamond?

Isn't diamond _already_ tetra?


Bret Cahill

  #10  
Old September 10th 06, 03:49 AM posted to sci.astro,sci.physics,sci.energy,sci.materials,sci.chem
Sorcerer[_3_]
external usenet poster
 
Posts: 203
Default 'Tetracarbon', 40 times harder than diamond?


"Bret Cahill" wrote in message
oups.com...
| Isn't diamond _already_ tetra?
|
|
| Bret Cahill

Yes.
The standard test for hardness is depth of penetration, whether
that is diamond into a steel surface or your dick.

Androcles


 




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