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In chemistry a Zintl phase is the product of a reaction between a group 1 (alkali metal) or group 2 (alkaline earth) and any post transition metal or metalloid (i.e. from group 13, 14, 15 or 16). They are named for the German chemist Eduard Zintl who investigated them in the 1930s,〔S.M. Kauzlarich, Encyclopedia of Inorganic chemistry, 1994, John Wiley & Sons, ISBN 0-471-93620-0〕 with the term "Zintl Phases" was first used by Laves in 1941.〔''Zintl Phases: Principles and Recent Developments'', Book Series: ''Structure and Bonding''. T. F. Fässler (Ed.), Volume 139, Springer, Heidelberg, 2011 (DOI 10.1007/978-3-642-21150-8)〕 Zintl phases are a subgroup of brittle, high melting point intermetallic compounds which are diamagnetic or exhibit temperature-independent paramagnetism, are poor conductors or semiconductors.〔Sevov, S.C., Zintl Phases in Intermetallic Compounds, Principles and Practice: Progress, Westbrook, J.H.; *Freisher, R.L.: Eds.; John Wiley & Sons. Ltd., Chichester, England, 2002, pp. 113-132 (Slavi Chapter )〕 Zintl noted that there was an atomic volume contraction when these compounds were formed and realised this could indicate cation formation.〔 He suggested that the structures of Zintl phases were ionic, where there was complete electron transfer from the more electropositive metal.〔 The structure of the anion (nowadays called the Zintl ion) should then be considered on the basis of the resulting electronic state. These ideas were further developed to become the Zintl rule or Zintl Klemm concept, where the polyanion structure should be similar to an isoelectronic element.〔 ==Examples== A Zintl phase is the product of a reaction between *group 1 (alkali metals) or group 2 (alkaline earths) and *post transition metals or metalloids from group 13, 14, 15 or 16. Examples of Zintl phases: Clathrates are another instance of Zintl phases with potential for thermoelectric power generation due to their rattling structure, which leads to low thermal conductivity. 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「Zintl phase」の詳細全文を読む スポンサード リンク
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