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Superconductor World Record Surpasses 250K - http://www.superconductors.org/254K.htm
Superconductors.ORG herein reports the observation of record high superconductivity near 254 Kelvin (-19C, -2F). This temperature critical (Tc) is believed accurate +/- 2 degrees, making this the first material to enter a superconductive state at temperatures commonly found in household freezers. ‎- ati