Einsteinium was discovered from the debris of the first experimentally tested hydrogen bomb in 1952. It is perhaps ironic that the namesake of Einsteinium actually warned the scientific community against the very technology that led to the identification of this element. It is a transuranic element, having high radioactivity. The most stable isotope is 253Es, which decays rapidly to 249Bk and 249Cf. Its scarcity (less than few milligrams available from lab scale synthesis every year) and radioactivity renders its chemistry very difficult to explore. Its compounds in the +II and +III oxidation state are often coloured and have beautiful glowing appearance due to its strong radioactivity. Crystal structures of Einsteinium compounds are difficult to determine due to self-destruction of structure caused by the heat accompanying radioactivity. Like other radioactive transuranic elements, Einsteinium also has potential application in cancer therapy if organic motifs for delivering the element to biological sites can be identified. The structure shown in the 3D viewer below is another Bismuth triiodide structure which can be found in the Cambridge Structural Database (CSD) this time due to it's metal-organic nature. The structure is tetrakis(propan-1-aminium) hexaiodo-bismuth triiodide, the entry in the CSD has CSD Refcode MISBAU and Publication DOI: 10.1039/C8TC04372H.
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