292 
METALS. 90. Bifmutum. 
90, BISMUTUM. Rcddifh- white, foft, britcle> 
compolcd of broad brilliant plates adhering w 
each other, Ipecific gravity 9 822: eafily melting 
and forming firft a yellowifh and then a red os- 
yde, in a ftrong heat burnii:g with a faint bine 
flame and emitting a yellow fmt)k.e, fufible with 
borax into a brown glals: foluble in acids 
dc'pofiting a white precipitate if its foltition in 
nitric acid be diluted with water. Bijmuth- 
nati‘vumi ynalloyed, entirely foluble in nitric acid, with metallic 
luftre. 
Wifmutum nativum. Sy/l, nat xii. 3. p. 128. n. i. 
Wifmutum nativum. WuU min, 242. 
Found in ^‘Weiien, France, Saxony, Wirtemhurg, Vranjyl-vania, 
See generally accompanied by cobalt ores, in a rtmti-ix cf red 
jafper, hornltone, quartz, and heavy fpar: colour white with 
a (hade of red, with the lurface often tarnilhed red, yellow 
or purple: fometimes it is cryilallized in 4 fided tables or in* 
diltinft cubes, but has molUy ttie form o fmall plates lying 
over each other: before the blowp pe it leaves a (livery white 
bead, which at lall evaporates in a yellowi(h-white fmoke : 
fpecilic gravity from 9,022. to 9,570. 
ochraceum. Friable or powdery, very foft, earthy, effervefeing with 
acids. 
Wiimiitum pulverulentum. CronR, mineral, 221. 
Ochra wifmuri Sy/l. nat xii. 3./ >93- » 7. 
Wifmutum pulverulentum. Wall.fyft. z 209. «. 6. 
Flowers of Biimuth. Berkenhout outl. p- 266. 
Bif iiuth ochre, Kir’wan mimral. z. p. 265- 
Ox)de of Bi(muth Schmeijser miner, z. p. 210. 
Bifmuth ochre, Thomjon chem 4. p 1^6, 
2, Ciyftall'zed in the form of cubes or 4-rided plates. 
C ryilallized Bifmuth ochre. Ktrmjan mineral 2./. 265. 
Found uiually accompanying other ore.s of Bifmuth, fometimes 
C( mpadf or dilTeminated, but generally covering ihe furface of ’ 
other ores in aloofe friaole form : colour yellowi(h-grey, pafl' 
ing into alhy-grey, green, or yellow. 
iulphwratum W^ith metallic luftre, tin or fteel-grey, not entirely folu* 
" ble in nitric acid, emitting fulphurous flame and fmoks 
when thrown on hot coals. 
Wifmutum fulphure min, Cronjl, mineral. 221, t . 
