264 



METALS. 84. Cuprum. 



Arfeniate of Copper. Schmeiffer mineral, z. p, 152, 



Arfeniat of Copper. Thomfon ch:vi 4 P-i^'. 



Arfeniate of Copper. So^werby nun /. 3 i, 32, 37. 03. 



Found in the Carrarack mine in Curn^u.ally und near Jomhaci^. 

 in Sile/iui in cliffs of quartz: colour various ra.adc>' of green, 

 fometimes inclining to brown, generally in tranfparent cryf- 

 lals of various forms ; fpecific gravity from 2,548. to 4,208 : 

 a fine fpecimen contained oxyde of copper 50,62. arfenicacid 

 45,00. water 350. Klaproth, 



tessellatunim Green, in fmall {hining cluftered cubical cryftals, emit- 

 ting arfenical fumes when burnt. 

 Klaproth fchreh Berl. Naturf. 7. /». 160. 

 SoiKierby Brit, miner., tab. 3 1 , &c. 



Found with the laft, of which it fecms to be a mere variety ; 

 it probably contains a little iron. 



arenaceum. 



phosphora- 

 tum» 



alhidum. 



Grafs-green, of the confiftence of fand, foluble in acids 



without effervefcence, burning with green and blue 



flames when thrown on hot coals. 

 Green fand of Peru. Kiriuan miner* 2. p. 149, 

 Muriat of Copper. Thomfon chem, 4. p, 46. 

 Found in PerUf and when examined through a glafs appears a 



mixture of tranfparent green particles with quartz: containi. 



oxyde of copper 73,0. muriatic acid 10,1. water 16,9, 



Klaproth, 



Greyifh-black externally, emerald green within, foft, of 

 a divergently fibrous fracture, opake. 



Phofphat of Copper. Thomfon cbo.m. 4. /. 46. 



Found at Rheinbreidhach near Cologne, in jumps, or difperfed 

 through other minerals, or in minute 6-fided cluftered cryf- 

 tals: luftre glaffy without, filky internally : it makes «a 

 apple-green fcratch : contains oxyde of copper 68,1 3. phoC* 

 phoric acid 30,95, Klaproth, 



Hardifli, whitilh, with a metallic luftre, emitting arfenU 

 cal vapours when burnt. 



Cupr. arfenic. album. Syft. nat, xii. 3. p. 145. «. 8. 



Cupr. arfenico ct ferro. Wall. fyit. 2. p 2?0. », 7* 



White Copper ore. Kirwan miner. 2 /. 152. 



White Copper ore. Schmei/ser miner- 2. p. 142. 



White Copper ore. Thomfon chem. 4. />. 38. 



Found with other copper ores in the Middleion Lvas veins, and 

 in the mines of Hungary ^ Siberiay Germany and Saxory, in- 

 terfperfed with other foffils in larger or fmaller lumpj, and 

 fometi'r.es cryftallized in 4-fided double pyramids: colour 

 ftecl or filvery-grey, often reddifh>brov/n: powder grey. 



