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From the NYT source linked on the Wikipedia article:

> The name of the material comes from the initials of the surnames of two of the scientists — Sukbae Lee and Ji-Hoon Kim — and the year 1999, when they say they first synthesized LK-99.

https://www.nytimes.com/2023/08/03/science/lk-99-superconduc...

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I guess it depends what you mean by LK-99. They didn't have any luck with their early batches and it wasn't until after an extended break in adjunct professorship and industry that they got back together. A happy accident happened where they bumped it part way through trying to synthesize it and they got a sample with some of the properties that kept them going. So in 99, they were just following the advice of their mentor who was a professor. The NYT coverage is misleading in that they weren't really sitting on room temperature and pressure superconductors for 20+ years.

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