|
|Section2= |Section3= |Section4= |Section7= |Section8= }} Cadmium sulfide is the inorganic compound with the formula CdS. Cadmium sulfide is a yellow solid.〔Egon Wiberg, Arnold Frederick Holleman (2001) (''Inorganic Chemistry'' ), Elsevier ISBN 0-12-352651-5〕 It occurs in nature with two different crystal structures as the rare minerals greenockite and hawleyite, but is more prevalent as an impurity substituent in the similarly structured zinc ores sphalerite and wurtzite, which are the major economic sources of cadmium. As a compound that is easy to isolate and purify, it is the principal source of cadmium for all commercial applications.〔 Its vivid yellow color led to its adoption as a pigment for the yellow paint "cadmium yellow" in the 18th century. ==Production== Cadmium sulfide can be prepared by the precipitation from soluble cadmium(II) salts with sulfide ion. This reaction has been used for gravimetric analysis and qualitative inorganic analysis.〔Fred Ibbotson (2007), ''The Chemical Analysis of Steel-Works' Materials,''Read Books, ISBN 1-4067-8113-4〕 The preparative route and the subsequent treatment of the product, affects the polymorphic form that is produced (i.e., cubic vs hexagonal). It has been asserted that chemical precipitation methods result in the cubic zincblende form〔Paul Klocek (1991), ''Handbook of Infrared Optical Materials,'' CRC Press ISBN 0-8247-8468-5〕 Pigment production usually involves the precipitation of CdS, the washing of the solid precipitate to remove soluble cadmium salts followed by calcination (roasting) to convert it to the hexagonal form followed by milling to produce a powder. When cadmium sulfide selenides are required the CdSe is co-precipitated with CdS and the cadmium sulfoselenide is created during the calcination step.〔 Cadmium sulfide is sometimes associated with sulfate reducing bacteria.〔Larry L. Barton 1995 (Sulfate reducing bacteria ), Springer, ISBN 0-306-44857-2〕 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「cadmium sulfide」の詳細全文を読む スポンサード リンク
|