Science > Physics > What are the vibrational speeds of atoms/molecules in a solid?
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Science > Physics |
| User: |
"Cygnus X-1" |
| Date: |
12 Aug 2005 05:10:06 PM |
| Object: |
What are the vibrational speeds of atoms/molecules in a solid? |
Anyone able to point me to references on how to compute this?
I may also want to compute the amplitudes of vibration.
Is there some relationship between density, atomic mass and these
quantities?
Thanks,
Tom
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| User: "Uncle Al" |
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| Title: Re: What are the vibrational speeds of atoms/molecules in a solid? |
12 Aug 2005 06:09:43 PM |
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Cygnus X-1 wrote:
Anyone able to point me to references on how to compute this?
Statistical thermodynamics and MO theory. Look at the frequencies with
IR (ungerade vibrations) and Raman (gerade vibrations).
I may also want to compute the amplitudes of vibration.
Thermal anisotropies in crystal structures. It's already been
measured.
Is there some relationship between density, atomic mass and these
quantities?
Yeah, isotopic mass matters as does bond strength. Bobs at the ends
of a spring.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf
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| User: "Androcles Androcles@ MyPlace.org" |
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| Title: Re: What are the vibrational speeds of atoms/molecules in a solid? |
12 Aug 2005 10:26:39 PM |
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"Uncle Al" <UncleAl0@hate.spam.net> wrote in message
news:42FD2C37.4243F20C@hate.spam.net...
[snip crap]
Idiot.
Androcles
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| User: "Charles" |
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| Title: Re: What are the vibrational speeds of atoms/molecules in a solid? |
12 Aug 2005 10:29:50 PM |
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On Sat, 13 Aug 2005 03:26:39 GMT, "Androcles" <Androcles@ MyPlace.org>
wrote:
"Uncle Al" <UncleAl0@hate.spam.net> wrote in message
news:42FD2C37.4243F20C@hate.spam.net...
[snip crap]
Idiot.
Androcles
Isn't it nice to have a hobby?
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| User: "Androcles Androcles@ MyPlace.org" |
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| Title: Re: What are the vibrational speeds of atoms/molecules in a solid? |
12 Aug 2005 10:35:19 PM |
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"Charles" <ckraft@SAMTRAP.west.net> wrote in message
news:v8qqf1p5o1d2s4r1svf5qocm6kan8ft333@4ax.com...
| On Sat, 13 Aug 2005 03:26:39 GMT, "Androcles" <Androcles@ MyPlace.org>
| wrote:
|
| >
| >"Uncle Al" <UncleAl0@hate.spam.net> wrote in message
| >news:42FD2C37.4243F20C@hate.spam.net...
| >[snip crap]
| >
| >Idiot.
| >
| >Androcles
|
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| Isn't it nice to have a hobby?
It passes the time at 4:30 am when you've finished the book and still
can't sleep,
hope to find something interesting and all you get is some moron calling
itself
"uncle" that writes "snip crap" to every poster it encounters. :-)
Androcles
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| User: "Cygnus X-1" |
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| Title: Re: What are the vibrational speeds of atoms/molecules in a solid? |
13 Aug 2005 12:00:18 PM |
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On Fri, 12 Aug 2005 19:09:43 -0400, Uncle Al wrote
(in article <42FD2C37.4243F20C@hate.spam.net>):
Cygnus X-1 wrote:
Anyone able to point me to references on how to compute this?
Statistical thermodynamics and MO theory. Look at the frequencies with
IR (ungerade vibrations) and Raman (gerade vibrations).
MO = Molecular Orbitals?
I may also want to compute the amplitudes of vibration.
Thermal anisotropies in crystal structures. It's already been
measured.
Any pointers to this? Measurements would be more effective, especially
for the heavier elements (Pb-U?). Most stuff online seems
semiconductor related.
Is there some relationship between density, atomic mass and these
quantities?
Yeah, isotopic mass matters as does bond strength. Bobs at the ends
of a spring.
I have Feynman's "Statistical Mechanics", Goodstein's "States of
Matter". Good theory books but nothing tying it to more experimental
measurements.
Thanks, this has helped me narrow my search, but not quite enough,
Tom
--
Dealing with Creationism in Astronomy
http://homepage.mac.com/cygnusx1
cygnusx1@mac.com
"They're trained to believe, not to know. Belief can be manipulated.
Only knowledge is dangerous." --Frank Herbert, "Dune Messiah"
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