264 METALS. 



Antimonial nickel. Contains 29 percent, of nickel and no sulphur. 

 It has a pale copper-red color, inclining to violet. H=5 - 5 — 6. Gr= 

 7*5. Crystals hexagonal. From the Andreasberg mountains. 



Nickel j)yrites or capillary pyrites. A brass-yellow sulphuret of 

 nickel, occurring usually in delicate capillary forms ; also in rhombo- 

 hedral crystals. Gr=5 - 28. Contains 64*3 per cent, of nickel. From 

 Bohemia, Saxony and Cornwall. Also occurs in needles at Antwerp, 

 N. Y., and in Lancaster Co., Penn. The mineral has been named 

 Millerite. 



A sulphuret of iron and nickel, of a light bronze-yellow, has been 

 reported from southern Norway. It contains 22 per cent, of nickel. 

 Gr=46. 



Griinauite. Still another sulphuret, (called bismuth nickel,) contains 

 10 to 14 per cent, of bismuth, with 22 to 40 - 7 of nickel. Color light 

 steel gray to silver-white ; often tarnished yellowish. H=4"5. Gr=« 

 5*13. From the district of Altenkirchen, Prussia. 



Nickel green. An arsenate of nickel, containing 37-6 per cent, of 

 oxyd of nickel. Color fine apple-green. Occurs with other ijickel ores 

 in Dauphiny, Prussia, and elsewhere. It is found with copper nickel at 

 Chatham, Conn. 



EMERALD IVICKEL. 



Incrusting, minute globular or stalactitic. Color bright 

 emerald green. Luster vitreous. Transparent or nearly so. 

 H=3-p-3-25. Gr=2-5— 2 7. 



It is a carbonate of nickel, containing 28 "6 per cent, of 

 water. Infusible before the blowpipe alone, but loses its color. 



Obs< Occurs with chromic iron and carbonate of mag. 

 nesia, on serpentine, in Lancaster county, Pennsylvania. 



An earthy oxyd of nickel and sulphuret occurs with black 

 cobalt, at Mine la Motte, Missouri. 



Pimelite is a clay colored by green oxyd of nickel. Kla- 

 proth found 15-6 per cent, in one specimen. Quartz is 

 sometimes colored by nickel. Chyroprase is a chalcedony 

 thus colored. 



GENERAL REMARKS ON NICKEL AND ITS ORES. 



The nickel of commerce is obtained mostly from the copper nickel 

 and chloanthite, or from an artificial product called speiss, (an impure 

 arseniuret,) derived from roasting ores of cobalt with which arseniu- 

 retted nickel ores are mixed. The ores are nowhere very abundant, 

 and the most productive are those of Saxony and Germany. 



Nickel also occurs in meteoric iron, forming an alloy with the iron, 

 which is characteristic of most meteorites. The proportion sometimes 

 amounts to 20 per cent. The great Texas meteorite, now in the Yale 

 College collections, contains 8 "8 to 9 - 7 per cent, of this metal. 



Nickel is obtained in the pure state from the speiss, by the following 



Describe the green hydrate of nickel. What is pimelite '! What ores 

 afford the nickel of commerce. Where else is it found ? 



