Here’s what’s different from last time:
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it’s more like “room temperature” than room temperature, the paper says 250K which is -23 C.
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it has already replicated, with two separate labs in China confirming the results.
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The chemical difference appears to be that this thing has sulphur where LK-99 did not.
nothing, ceramic super conductors that operate at “high” temperature have been known about for decades this one has a particularly “high” temperature but its not significantly higher such that it would make a difference. people care about super conductors because they are conductors aka they wanna make cables out of them and u cant make a cable out of ceramic, and this is a ceramic material. i mean its so brittle they couldnt even make a full puck of it for their big headline picture.