METALS. 97. Mo!ybd3Enum._ 
3 ^ 
97. MOLYBDiENUM. BlulOi-grey not tarmfTi- 
ing, brittle, not magnetic, compofrd of fcaiy 
particles cohering together, fpecific gravity 
7 coo : nearly inforibie, gradually becoming a 
white volatile oxyde when heated, which' witH 
borax forms a violet and with microcofmic tot a 
a green erjafs: pirdy foluHlein fulphunc ac?d,and 
crivin<^ the iolution firft a green and then a blue 
O ^ 
colour. 
yMlgare. Molybd^NUM- 
Molybdsenum. Syst. vat. xii. 3. /. 121. i* 
Mohbdasna puia. Wail. typ. 2. /. 249. v. 1. a. 
Molybdenite. Kirviav mineral 2. f. 3 « 9 - 
Sulphurifed molybdtena. Scbmei£cr miner, t.p. 256. 
Sulphurct of molybdtena. Thomfott them. />. 117. 
Found in France, Spain, Sweden, S«;vonv, <t/>erta, and l elanP, 
in gangues of feldfpar, lith-.marg, or qu.inz, f/tierallv >a 
males confilfing of fmalt grains agglutinated together, fome- 
times civftallizcd in 6-fideci tables; coloor-digf t lead -grey, 
ivith fometimes a fbadc of red ; ftreak hliiifit grey, metallic ; 
pDwd. rbluifh : fofr, opake, llaining the fingers, and feeling 
a hole greafy to the touch : texture lamellar, with the Wy 
ations thin, incurved, and fligl tly flexible; with warm ni- 
tric acid it efFcrvefces, leaving a giey oxyde unaifiolv d; 
befoic the blowpipe it evaporates in white fulphurous vapours; 
fpecific gravity from 4,569. 104,738; contains, molybdainnm 
to, fulphur 40. Klaprath. 
