NICKEL ORES. 209 



' \ C CO V \T^ • C0PPER nickel. — Arsenical Nickel. 



Hexagonal. Usually massive. Color pale copper-red ; 

 streak pale brownish-red. Luster metallic. Brittle. H= 

 6—5 5. Gr=7-3— 7-7. 



Composition : nickel 44, and arsenic 56 ; sometimes part 

 of the arsenic is replaced by antimony. Gives off arsenical 

 (alliaceous) fumes before the blowpipe, and fuses to a pale 

 globule, which darkens on exposure. Assumes a green 

 coating in nitric acid, and is dissolved in aqua-regia. 



J) If. Distinguished from iron and cobalt pyrites by its 

 pale reddish shade of color ; also from the former by its 

 arsenical fumes, and from the latter by not giving a blue 

 color with borax. None of the ores of silver with a metallic 

 luster have a pale color, excepting native silver itself. 



Obs. Accompanies cobalt, silver, and copper ores in the 

 mines of Saxony, and other parts of Europe ; also sparingly 

 in Cornwall. 



It is found at Chatham, Conn., in gneiss, associated with 

 white nickel or chloanthite. 



,V\\-QK^^"VUTE. cloanthite. — White Nickel. 



Monometric. In cubes. Color tin-white. Streak grayish- 

 black. R=5 5— 6. Gr=6-4— 6 7. 



Composition: nickel 2840, arsenic 70 34, (from Kams- 

 dorf ) Often contains cobalt, and graduates into smaltine. 



It. also sometimes contains iron, and this variety is the 

 safflorite of Haidinger, or chathamite of Shepard. The ore 

 from C hatham, C onn., affords 10 to 12 per cent, of nickel, 

 I lo 3 of cobalt, and 12 to 18 of iron. 



Found usually with smaltine at its various localities. 



Nickel glance is another arsenical ore. occurring in cubes and massive* 

 Color silver-white to steel-gray. Contains 28 to 30 per cent, of nickel 

 with arsenic and sulphur. H=55. Gr=-6 1. From Helsingland, in 

 Sweden, and also in the Hartz. Also at Schladming, in Austria, con- 

 taining 38 per cent, of nickel, and having the specific gravity 66 — 6*9. 

 This ore has been called Gersdorffite. 



Nickel Stibine. An antimonial sulphuret, called sometimes Nickel- 

 iferous antimony ore, containing 25 to 28 per cent, of nickel. Color 

 steel-gray, inclining to silver-white. In cubical crystals and also 

 massive. H=5 — 5*5. Gr=6*45. From the Duchy of Nassau. 



What is the crystallization and appearance of copper nickel 1 of what 

 does it consist 1 How is it distinguished from iron and cobalt pyrites 

 how from silver ores? Where does it occur] 



