[time-nuts] Better quartz crystals with single isotope ?
kb8tq at n1k.org
Sun Apr 22 19:56:50 EDT 2018
Quartz ball yes. It’s a fused quartz (as opposed to crystalline quartz) ball …..
Fused quartz is a lot easier to work with. In order to be piezoelectric, it must
be crystalline. The piezo properties are what lets you make a resonator out of it.
> On Apr 22, 2018, at 6:28 PM, Brooke Clarke <brooke at pacific.net> wrote:
> I found a perfect quartz ball. It took Stanford many decades to make it.
> Have Fun,
> Brooke Clarke
> -------- Original Message --------
>> Isotopes of an element differ in the number of neutrons. The chemical reactions of an element are governed by the electrons, which are the same for all isotopes, so chemical means can not be used to separate the isotopes.
>> There are a number of ways of making the separation, for Uranium see:
>> It's not clear to me how the isotopes of water are accounted for in it's physical properties. Have these been refined and defined for each isotope? This may be important since the properties of water show up a lot as the basis for other definitions.
>> PS One of the names of the company I worked for was FEI Microwave. There was a rumor that the funder of that company had a bunch of very special quartz in the vault and that crystals cut from that material had better phase noise than off the shelf crystals hence he had an advantage over other vendors.
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