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硫化镉

硫化鎘
3D model of the structure of hawleyite
3D model of the structure of greenockite
别名 硫化鎘(II)
识别
CAS号 1306-23-6  checkY
ChemSpider 7969586
SMILES
 
  • [S-2].[Cd+2]
InChI
 
  • 1/Cd.S/q+2;-2
InChIKey FRLJSGOEGLARCA-UHFFFAOYAL
UN编号 2570
EINECS 215-147-8
RTECS EV3150000
性质
化学式 CdS
摩尔质量 144.48 g·mol−1
外观 黃色或橙色固體
密度 4.82 g/cm3,固體
熔点 1750 °C(2023 K)(10 MPa)
沸点 980 °C(1253 K)(1.292×10-12g/1003
溶解性 insoluble[1]
折光度n
D
2.51
结构
晶体结构 六角, 立方
危险性
警示术语 R:R45, R22, R48/23/25, R62, R63, R68, R50/53
安全术语 S:S53, S45, S61
MSDS ICSC 0404
欧盟编号 048-010-00-4
欧盟分类 Carc. Cat. 2
Muta. Cat. 3
Repr. Cat. 3
有毒 (T)
危害環境 (N)
NFPA 704
0
3
0
 
闪点 不易燃
相关物质
其他阴离子 氧化鎘
硒化鎘
其他阳离子 硫化鋅
硫化汞
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

硫化鎘无机化合物,化学式为CdS。它是一种N型光电导半导体材料。属Ⅱ-Ⅵ族化合物半导体。分子量144.476,属六方晶格结构,晶格常数5.86×10-10m,熔点1750℃,禁带宽度2.41电子伏,电子和空穴的迁移率分别为2×10-2和2×10-3米2/伏·秒,相对介电常数11.6。硫化鎘是一種黃色固體,幾乎不溶於水,普遍在閃鋅礦纖鋅礦雜質中發現,這亦是鎘的主要來源。作為一種化合物,易於分離純化。

反應

硫化鎘與鹽酸反應,生成氯化鎘及釋出硫化氫

CdS + 2 HCl → CdCl2 + H2S

H2S → H2 + S ΔHf = +9.4 kcal/mol

應用

顏料

硫化鎘被稱為鎘黃(Pigment yellow 37)。通過加入不同分量的,可獲得各種顏色,例如CI pigment orange 20 及 CI pigment red 108。

參考文獻

  1. ^ Lide, David R. Handbook of Chemistry and Physics 87. Boca Raton, FL: CRC Press. 1998: 4–67; 1363. ISBN 0849305942. 
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