PHYSIOGRAPHY. 



Selencuprite Serpentine. 



1. Fusible before the blow-pipe into a grey globule, which is slightly 

 malleable. It is decomposed by nitric acid, and the solution deposits 

 metallic copper on a piece of clean iron. 



2. Analysis. 

 By BERZEI.HJS. 



Selenium . . . . . m 40-00 



. ..... 64 . 00 



3. It occurs forming black coatings upon Calcareous Spar, or in mi- 

 nute seams traversing this substance, at the copper-mine of Skrickerum 

 in Smoland. 



SELENIURET OF COPPER. (See Selencuprite.) 

 SELENIURET OF LEAD. (See Clausthalite.) 

 SELENIURET OF PALLADIUM. (See Selenpalladite.) 



SELENIURET OF SILVER AND COPPER. (See Eukai- 

 rite.) 



SELENIURET OF SULPHUR. (See Sulpho-selenite.) 

 SELENIURET OF ZINC AND MERCURY. (See Rionite.) 

 SELENPALLADITE. 



Primary form. Regular hexagonal prism. 

 ^Cleavage, parallel with the base, perfect. 

 Lustre metallic. Color white to grey. Opake. 

 Brittle. 



1. Heated in a glass tube, it gives a red ring of selenium. It is fu- 

 sible into a brittle metallic globule, and dissolves with borax into a color- 

 less glass. The roasted ore affords in nitro- muriatic acid a brown solu- 

 tion, from which some chloride of silver, and crystalline chloride of lead, 

 is precipitated. The addition of cyanide of mercury, colors the solution, 

 and throws down cyanide of palladium. According to ZIJVKEN, it con- 

 sists of seleniuret of palladium, seleniuret of silver, and seleniuret of lead. 

 2. It is found with Native Gold and Clausthalite, at Zilkerode in the 

 Hartz. It is likewise said to occur in the Russian platina-mines. 



SERPENTINE. Prismatic Atelene-Picrosmine. 

 Primary form. Right rectangular prism. 



