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|Section2= |Section3= }} Bismuth oxychloride is an inorganic compound of bismuth with the formula BiOCl. It is a lustrous white solid used since antiquity, notably in ancient Egypt. Light wave interference from its plate-like structure gives a pearly iridescent light reflectivity similar to nacre. ==Structure== The structure of can be thought of as consisting of layers of Cl−, Bi3+ and O2− ions (in the image Bi = grey, O = red, Cl = green). These ions are ordered as Cl-Bi-O-Bi-Cl-Cl-Bi-O-Bi-Cl, i.e., with alternating anions (Cl-, O2-) and cations (Bi3+). The layered structure gives rise to the pearlescent properties of this material. Focusing on the coordination environment of the individual ions, the bismuth centers adopt a distorted square antiprismatic coordination geometry. The Bi3+ ion is coordinated to four chloride, forming one of the square faces, each at a distance of 3.06 Å from Bi, and four oxygen atoms forming the other square face, each at a distance of 2.32 Å from Bi. The oxygen atoms are tetrahedrally coordinated by four bismuth atoms. 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「Bismuth oxychloride」の詳細全文を読む スポンサード リンク
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