Uncle Al wrote:

If anybody cares...

http://www.mazepath.com/uncleal/qz.pdf
Fig. 2, Table VI.

We recently crunched quartz to 3.3 quadrillion atoms or a 43 micron
diameter ball -

snip

So what does your model look like if you do the real world
version incorporating 1000 ppm randomly incorporated
impurities?