METALS. 82, Aro-entum. 



253 



fragile. Of a black lead-colour, .without metallic luftre, opake, 



eafily melting with fulphuric flames and vapours^ 

 brittle. 



Roefchgewaechs. Fogcl. mineral, p. 445, 

 Antimoniatcd iilver ore. Kiyvcan min 2. p, 1 1 8. 

 Brittle filver ore. SchmeiJJer miner. 2. p 50. 

 Antimoniatcd fulphuret. Tbomfon chem. 4. p, 27. 



Found in the mines of Dauphi^ny, Saxony y Bohemia^ lJun?/jry^ 

 and Siberiay and refemhles the laft except in being rendered 

 brittle by an admixture of iron and antimony : colour iron- 

 grey, azure or dark blue when tarnifhed, wuh little metallic 

 luftre, and of a compact texture: it is generally found maf- 

 five or difleminated, fometimes cryrtallized in indiltinil and 

 accumuhted 6-lided prifinf, or tables, or rhomls: before 

 the blowpipe the fulphur and antimony evaporate, leaving a 

 button, which may be fep^irated from the iron by fufion with 

 nitre and borax: fpecific gr.wity 7,208: contains filver 

 66,<;, fulphur 12,0. antimony 10,0, iron 5,0. filica 1,0, 

 grfenic and copper 0,5. Klaproth. 



nifens. Shining, of a lead-colour, ponderous, lamellar, brittCj 



eafily melting. 



Reno'vanz, 'v. alt. Gab. p. I 37. 



Cupriferous fulphurated filter. Kir^an 2. p. 121. 



Cupriferous fulphuret. Tbomfon chem. 4. p. 28. 



Found in the Korbolokinksk mountains of Siberia^ in the fiffurej 

 of hornllone rocks, in irregular lumps of various fizcs : its 

 powder when rubbed between the thumb and finger gives a 

 black colour to the fkin with a Uad glofs: when heated part 

 is firil fufed and refembles fulphurated filver, the remainder 

 is of rnuch more difficult fufibility and refembles black cop- 

 per : it communicates a blue colour to nitric acid, and when 

 difTolved in it depofits fulphur: contains ab.nit filver 4?. 

 copper 21, fulphur 35. Tbomfon. 



fuhrum. Ponderous, red when fcraped, a little fhining internally, 

 decrepitating in the fire, and afterwards melting with 

 an arfenical fmell. 



Argentum rubefc^ns. Syji. nat. xii. 3. p. 149. «. /\» 

 Argentnm fulphure, &c. Cronft, min.fed, 169. 

 Argencum arfenico mineralif. Wall, fy/h 2. /. 333. ». 4. 

 Argentum rubrum. IVolterj'd. m'tn. 29. 



I« Of a colour between blood and cochineal-red, fometimes vari- 

 egated : ftreak orange-red : powder black. 

 Silver with antimony, &c» SchmeiJJer mineral. 2./, 55, 



