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It is a diamond press, the diamonds have to be cut to shape and they also have to be transparent. Industrial diamonds aren't transparent enough.
by HarryHirsch 6y ago
It is a diamond press, the diamonds have to be cut to shape and they also have to be transparent. Industrial diamonds aren't transparent enough.
- gautamcgoel 6y agoWhy do the diamonds need to be transparent?
- TheAdamist 6y agoSo they can probe/measure the contents with light, usually in laser form. Contents are completely enclosed by diamond to hold the pressure. No way to probe otherwise as far as i know.
- s0rce 6y agoX-rays are also widely used to probe high pressure matter within diamond anvil cells Here is an example at an ESRF beamline https://www.esrf.eu/home/UsersAndScience/Experiments/MEx/ID15B/overview.html https://www.esrf.eu/home/UsersAndScience/Experiments/MEx/ID1...
- smartscience 6y agoDon't forget neutrons! Not as quick to measure, and not so good with very small samples, but well-suited to combinations of extreme environments beyond just pressure, such as temperature, magnetic field, voltage gradient etc. https://www.isis.stfc.ac.uk/Pages/Pearl.aspx https://www.isis.stfc.ac.uk/Pages/Pearl.aspx
- HarryHirsch 6y agoAmusing to see for an x-ray crystallographer that the neutron scattering coefficient for tungsten carbide is actually lower than for pure carbon. Neutrons are weird.
- HarryHirsch 6y agoPeople interested in high-pressure chemistry follow what's happening with spectroscopy, UV/Vis or infrared. Fig. 3 on p. 376 has the Raman spectrum.
- Sharlin 6y agoModern lab-grown diamonds are higher quality than even the finest gem-quality natural diamonds.
- kulahan 6y agoFrom what I understand, the issue with lab-grown diamonds is that they can't really grow them beyond a certain size at this time. I think clear ones are a couple of carats, and colored ones are roughly double that. I could be off a bit. Regardless, that's not huge, though I don't know what size they require. Maybe it's sufficient.