310 
METALS^ 98. Uranmro. 
tchractuttSt 
Qhskdi- 
tbus. 
98. URANIUM. Dark-grey inclining internallf 
to brown, with a {light luftre, foft, brittle: fpc' 
cific gravity 16,440: hardly fufible before the 
blowpipe, but with borax forming a brown and 
with micror ofiTiic fait 2 grafs-green glafs: con- 
vertible into a yellow oxyde by the nitric acid. 
Yellowifli or green, of an earthy texture, entirely folublc 
in nitric acid, combined with a large portion of oX' 
ygene. 
Uranites. Klafrsth chem. anval. 1 789- 2* ^.405. 
Uranitic ochre. Kir--jiian mimral 2. p. 303, 
Earthv oxyde of uranit. Schmeifser miner. 2. f, 276. 
ydlow oxyde of uranium, Tbmfin cbem, 4. p. 1 19. 
Generally found on the fniface of Uranium fulphnreujn oc 
Pechblende in Corn’wall, &c. of a lemon or britnftone yel- 
low or green: it flighily Rains the fingers, is meagre to the 
touch, hardly fufible before the blowpipe, but in a ftrong 
heat becomes black : fpecific gravity 3,243: confilis of ox- 
yde of uraniiym and oxygene. 
Hardilb, diaphanous, ffiining internally, of a foliated teX' 
ture, entirely foluble in nitric acid. 
Uranites fpathofus. K/apr. cbem ennal. 1789 2./. 403, 
Chalcolit. Werner Bergm. Je^rn 1789. i. 376, 
Micaceous uranitic ore. Kir<wan miner, z. p. 304, 
Spatous uranit. Sthmetfier miner, 2. p. 276, 
Cryftaltized oxyde of Uranium. Ihomjom 4. p. i ig. 
Oxide of Uranite, Savierhy Brit. min. t, 125. 
Found in CornweaU, near Eibenfteck and "JohanngesrgenHadt 
Saxsry, and near Bheinbreidenbach in the eleftorate of Trie-veit 
fometinies on the forface of other ores, fometiines in larger or 
lefs particles mixed with rocks of gneifs, garnet or quait^ 
mod commonly cryftallized in cubes, fquare plates, 8-fided 
or 6-fided prifms: colour emerald or grafs green, often in- 
clining to filvery-white or yellowilh, with a greenifh-wbR* 
ftreak : luflre fometimes perlaceons, fometimes metallic : tex- 
ture foliated, brittle: foluble in nitric acid without effer- 
velcence, but infoluble and infufible by alkalies: confitts®* 
oxyde of u’anium, carbonic acid, and the green kind a Utd® 
oxyde of copper. 
