Hi
> On Apr 22, 2018, at 12:19 PM, Poul-Henning Kamp <[email protected]> wrote: > > Silicon comes in a number of isotopes but 95% of it is Silicon-28. > > When you make pure mono-crystaline silicon, you get 50-60% better > thermal conductivity if you only use Silicon-28 atoms. > > Yes, you read that right: 50-60% improvement for removing the > remaining 5% other silicon isotopes, and for this and other reasons, > sorting silicon atoms by isotope is now a thing, which amongst other > side effects have made the Advogardo Project possible. > > I can't help wonder if there may be similar interesting effects in > quartz crystals, if they were monoisotopic ? > > Several relevant mechanisms can be imagined, lower internal damping, > higher stiffness etc. etc. > > We know a LOT about quartz and have a very good theory for its > behaviours, but i find no signs anybody has ever touched monoisotopic > Quartz. > > The obvious experiment is not rocket-science, nor does it demand > inordinate resources for amateurs, see for instance from 03:35: > > https://archive.org/details/59554KrystallosCF > > But it is clearly beyond what I have time to persue. > > Do we know anybody in the quartz business who needs a really cool > research project ? You could put it on the list with the 1 Kg quartz resonator proposal ….. https://tf.nist.gov/general/pdf/2638.pdf <https://tf.nist.gov/general/pdf/2638.pdf> Also an offshoot of people thinking about the implications of all this as it relates to resonators. Bob > > Poul-Henning > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > [email protected] | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
