![]() ![]() The material takes the appearance of deep purple crystals with pink frosting. Pure product was obtained by mechanical separation of crystalline material from the broken glass and slag (Fig. Subsequent cooling to room temperature over a further 4 hours prompted the product to crystalise, after which time the reaction flask was smashed with a hammer. The reaction vessel was then placed in a pre-heated arc-furnace at 2600 ☌ for 0.1 seconds, then transferred to a conventional furnace at 800 ☌ for 4 hours, during which time the reaction mixture partially liquefied (Fig. To prepare corium SK-431, powdered iron, UO 2, CsI, CoI 2, SrI 2 and ZrO 2 were combined in a thick-walled zirconia Schlenk flask and pressurised with 60 atmospheres of wet H 2 (Fig. To our delight, the 431 st experiment yielded a material with desired properties, the synthesis of which is described below. 430 unsuccessful attempts were made to remake our initial material, the details of which are contained in pages 7–12,056 of the electronic supporting information. The discovery of SK-431 was serendipitous, and the conditions under which the compound was first synthesised could not readily be repeated. However, repeating our initial results proved to be exceedingly challenging, and has consumed much of the intervening decades. We first obtained promising conductivity results with a zirconia-corium composite in 1985. B After 37 years of intrepid work, we are pleased to report a novel cobalt-doped uranic-corium, “SK-431”, which we tentatively posit is a superconductor with T C = +27 ☌. Our institute A began studying the condensed-matter physics of the actinides in 1985, when we obtained some interesting ferro-uranic caesium-iodide composites from our colleagues in Vladivostok. For example, our laboratories in eastern Siberia rarely reach temperatures above -60 ☌, and as such a room-temperature superconductor is more viable here than anywhere else in the world. We find it notable that seekers of room-temperature superconductors spend all their time optimising the operating temperature ( T C) of their materials, and ignore the temperature of the room that they put them in. Researchers from around the globe are lining up to rubbish these findings, (as if it were a “metal-free” Suzuki reaction), and unfortunately it seems likely that this discovery will soon be consigned to the midden-heap of materials science. 1,2 Most impressively, the material exhibits the Meissner effect: partially levitating above a magnet. This cycle appears to be playing out again, as a group of researchers from Korea have published pre-prints in which a Cu-doped Pb-apatite material called LK-99 appears to exhibit superconductivity up to +127 ☌. Many have tried to make them, some have even published on them, but none have passed the most crucial test: trial-by-twitter. ![]() Room temperature superconductors are frequently referred to as a holy grail of physics and materials science. ![]() Herein, we report the synthesis and characterisation of such a material: a cobalt-doped uranic corium called SK-431. Such a material has as unrivalled capacity to produce platitudes and hyperbole from science communicators and journalists, as well as some minor implications for the electronics and power industries. The search for a material capable of conducting electricity without resistance at room temperature and atmospheric pressure has preoccupied scientists for more than a century. Blyatovik, B Ivan Obman B and Georgy Schlonkotenko C ![]()
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