氦化钠是一种钠的惰性气体化合物,化学式为Na2He,其结构可表示为(Na+)2He(2e−),于2016年由中国化学家制得。
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氦化钠由钠与氦在高温与极高压(>113GPa)下合成。[2][3]
Na2He在接近1,500K的高温下熔化,远高于钠的熔点。
Dong, Xiao; Oganov, Artem R.; Goncharov, Alexander F.; Stavrou, Elissaios; Lobanov, Sergey; Saleh, Gabriele; Qian, Guang-Rui; Zhu, Qiang; Gatti, Carlo; Deringer, Volker L.; Dronskowski, Richard; Zhou, Xiang-Feng; Prakapenka, Vitali B.; Konôpková, Zuzana; Popov, Ivan A.; Boldyrev, Alexander I.; Wang, Hui-Tian. A stable compound of helium and sodium at high pressure. Nature Chemistry. 6 February 2017, 9 (5): 440. Bibcode:2017NatCh...9..440D. PMID 28430195. doi:10.1038/nchem.2716.