148 PHYSIOGRAPHY. 



Copper Nickel. 



COPPER NICKEL. Cupreous Eruthleucone- 

 Py rites. 



Massive : composition granular, individuals being small, 

 and strongly connected : reniform, composition columnar, 

 generally impalpable. Fracture uneven. 



Lustre metallic. Color copper-red. Streak pale brown- 

 ish-black. 



Brittle. Hardness =5-0 . . . 5*5. Sp. gr. =7-655. 



1. Before the blow-pipe, it melis upon charcoal, and emits an arsen- 

 ical smell. The remaining metallic bead is white and brittle. In ni- 

 tric acid, it soon becomes covered with a green coating. It is soluble in 

 nitro-muriatic acid. 



2. Analysis. 

 By PFAFF. 



Nickel . 44-206 (with a little cobalt.) . 48-96 



Arsenic . 54-726 .... 46-42 



Iron . 0-337 .... 0-34 



Lead . 320 .... 0-56 



Sulphur . 0-401 . . . ' . 0-80 



3. The Copper Nickel chiefly occurs in veins in various classes of 

 rocks, occasionally occurring in them as beds. It is almost always ac- 

 companied by Smaltine ; sometimes also by ores of silver and lead, and 

 often invested by Nickel-ochre. 



4. The present species is found in veins at Schneeberg, Annaberg, 

 Marienberg, Freiberg, Gersdorf and other places in Saxony; at Joach- 

 imsthal in Bohemia ; at Saalfeld in Thuringia ; at Riegelsdorf in Hes- 

 sia; in the Hartz and Black Forest ; also at Allemont in Dauphiny, and 

 in several of the mines of Cornwall. In beds, it occurs at Schladming 

 in Upper Stiria, and in the neighborhood of Orawitza, in the Bannat. It 

 occurs in the United States at Chatham in Connecticut, accompanied by 

 Smaltine in gneiss. 



5. DOEBEREINER has observed that the metallic alloy, consisting 

 chiefly of arsenic and nickel, which is obtained from the process of fab- 

 ricating smalt, often crystallizes in four-sided tabular crystals, and is in 

 every respect similar to Copper Nickel. 



CORDIERITE. (See lolite.) 



