288 
METALS. 88. Niccolum. 
88, NICCOLUM. Reddifli -white, hard, malle* 
able, accradted by the magnet and itielf conver- 
tible into the magnet, fpecific gravitv 9,000! 
fnfing with great difBculty, but affuming a green 
colour when heated and acquiring a purple tinge 
if the hear be continued, melting With borax into' 
a glafs of a hyacinth colour: foluble in ail ac.ds 
giving the folotion a green colour, and in am- 
monia to which it gives a bluilh-green colour. 
echraceum. Green, without liiftre, of a common form. 
Ochra cupri nickali. Syif. nat. xii. 3 p. 193^ nV 5. 
Niccolain viricic. Wall.fyst z. p. z. 
Nickel ochre. Kirwan miner 2 p 283. 
Oxvde of Nickel, Schmci/ier ntiner. 2. 218. 
Nickel ochre. Thomfon (hem. 4. p. 82. 
Found in Saxony, Bohemia, and SHefia. on the furface of other 
ores of nickel, in the form of powder or indurated ; colour 
apple-green, rarely grafs.gr,en, dark green or bluilh-green : 
has an earthy appearance and is very friable; gives an e rthy 
fmell when breathed on, and flightly ftains the fingers: does 
not rack before the blowpipe, but gives a reddilh oryellowilh 
tinge to borax : it appears to originate from the decornpoC- 
tion of native nickel ore. 
metallinum. With metallic luftre, entirely foluhle in nitric acid, emit- 
ting arfenical vapours before the blowpipe. 
Arfenicated nickel. Ktriuan m 7 neraL z, p. 285. 
Oxyde of nickel. SchmeiJJer mineral. 2. p. 218. 
Arfeniat of nickel. Thomfon chem 4. p. 83. 
Found in the mines of Saxony, and the ^arz, in irre- 
gular raalfesand often mixed with fulphate of barytes: colour 
pale grey, with o:ten a mixture of pale green ; frafture com- 
pafl, partly earthy partly fplintery, with a white ftreak : 
gives an earthy fmell when breathed on, and adheres fligtitly 
to the tongue : it contains fome cobalt and alumina, and often 
fulphate of barytes, beftdes the arfenic acid. 
sulphuratum'W'nh metallic luftre, not quite foluble in nitric acid, 
emitting arfenical vapours and fulphurous flame and 
vapours before tlie blowpipe. 
Cuprum niccolum, Syst nat xii. 3. p. 146. n. 16. 
Niccolum ferro et cobalt. Wall. Jyfl, 2. p. 189. n, i. 
