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- From: tyadav@athena.mit.edu (Tapesh Yadav)
- Subject: Re: Buckminster Fullerenes
- Message-ID: <1992Nov15.163955.26693@athena.mit.edu>
- Sender: news@athena.mit.edu (News system)
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- Organization: Massachvsetts Institvte of Technology
- References: <sundermm.60.0@columbia.dsu.edu>
- Date: Sun, 15 Nov 1992 16:39:55 GMT
- Lines: 31
-
- ===========================
- sundermm@columbia.dsu.edu (MARC SUNDERMEYER) writes:
- >
- > I have always heard of and seen the chemical structures of the new
- >Buckminster Fullerenes, but hat does the actual substance look like if you
- >were to have a handfull of it? (Any of the types, not just C60.)
-
- Fullerenes have very interesting (crystal) structures.
-
- Buckminsterfullerene (C60) looks yellow as a film. In solution it
- is lilac (beautiful to watch :) ). Different temperature/pressure
- treatments make the appearance of solid C60 change.
- I have not seen a big C60 crystal, first hand. But, I am told that
- small crystals, made using sublimation and annealing, show hexagonal
- faces; but not the truncated icosahedron.
-
- Other fullerenes have been difficult to prepare in large quantities.
- C70 can be made in large quantities - atleast here at MIT. It appears
- (dark) red in solution. The solid film is redish pink (a friend of
- mine says - com'on, its pink, can't you see; well, pink is her favorite
- color.) The solid seems to form amorphous form much more easily. There
- are reports of crystalline forms.
-
- Bucky tubes, as synthesized, look like broken tree stem. With hard/dark
- bark outside and tubes packed in - not much orientation tho.
-
- Latest are bucky onions. See latest Nature for more.
-
- T.Y.
- ----
- tyadav@athena.mit.edu
-