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|Section2= |Section3= }} Californium polyborate is a covalent compound with formula Cf(). In this compound the californium is in a +3 oxidation state. Californium polyborate is unusual in that californium is covalently bound to the borate. Californium was expected to resemble lanthanide elements in being highly ionic. The polyborate anion is polarisable and flexible.〔(【引用サイトリンク】url=http://phys.org/news/2015-06-unusual-bonding-properties-possibility-californium.html )〕 The 5f, 6d, 7s, and 7p orbitals of californium are all involved on the bonding.〔 Most valence electrons are in the 5f orbital, and a significant fraction () in the 6d orbital, and smaller fractions of one electron are in the 7s and 7p orbitals.〔 ==Formation== Californium(III) polyborate can be made by autoclaving a californium(III) chloride solution in water with excess boric acid for a week at 240°C. This is then cooled slowly to room temperature for another three days. Water dissolves excess boric acid to leave insoluble crystals of the borate.〔 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「Californium(III) polyborate」の詳細全文を読む スポンサード リンク
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