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|Section2= |Section3= }} Europium (II) sulfide is the inorganic compound with the chemical formula EuS. It is a black, air-stable powder. Europium possesses an oxidation state of +II in europium sulfide, whereas the lanthanides exhibit a typical oxidation state of +III.〔C. Housecroft. Inorganic Chemistry. 3rd. Essex, England: Pearson Education Limited, 2008. Print. ISBN 0-13-175553-6〕 Its Curie temperature (Tc) is 16.6 K. Below this temperature EuS behaves like a ferromagnetic compound, and above it exhibits simple paramagnetic properties.〔Zhao, F. Sun, H. Su, G. Gao, S. Small, Synthesis and Size-Dependant Magnetic Properties of Monodisperse EuS Nanocrystals. 2006 volume 2, No. 2, 244-248. 〕 EuS is stable up to 500 °C in air, when it begins to show signs of oxidation. In an inert environment it decomposes at 1470 °C.〔 ==Structure== EuS crystallizes in face-centered cubic (FCC) crystal lattice with the rock salt structure. Both europium and sulfur have octahedral coordination geometry with a coordination number of six.〔〔Wells A.F. Structural Inorganic Chemistry. 5th. London, England: Oxford University Press, 1984. Print. ISBN 0-19-855370-6〕 The Eu-S bond lengths are 2.41 Å. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Europium(II) sulfide」の詳細全文を読む スポンサード リンク
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