Mar 18, 2009: Even rounder thing

[SPUCK]

A nanometer(nm) is 0.000,000,001 meters.
An Angstrom is 1/10 of a nanometer. A silicon crystal has a nucleus to nucleus spacing of 5 Angstroms. Or 0.5nm.

So an "atomic layer" is about 0.5nm.
40 atomic layers ~ 20nm.

[Beest]

Originally Posted by SPUCK

A nanometer(nm) is 0.000,000,001 meters.
An Angstrom is 1/10 of a nanometer. A silicon crystal has a nucleus to nucleus spacing of 5 Angstroms. Or 0.5nm.

So an "atomic layer" is about 0.5nm.
40 atomic layers ~ 20nm.

0.54 nm is the lattice parameter, not the nucleus to nucleus distance of adjacent atoms .
It's probably what they meant by 'atomic layer' but not technically correct.
The Gravity Balls were quartz, lattic parameter 0.49 nm.

X-ray diffraction is my main occupation now, I can do a 'can you tell what it is yet' of diffraction patterns if you like.

[xoxoxoBruce]

Another one... youze guys are giving me an inferiority complex.

I can do a 'can you tell what it is yet' of diffraction patterns if you like

Yes, please.