Superconductors.ORG herein reports high Tc has been advanced to 77 Celsius (170F, 350K) with the discovery of the compound Tl7Sn2Ba2MnCu10O20+. This exceedingly high transition temperature (Tc) was achieved by substituting manganese into the titanium atomic sites of the 65 Celsius superconductor announced in January 2014. This substitution increases the dielectric constant (K) of the anion in the "light" region of the H212 structure by two orders of magnitude.
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