312 METALS. 99. TItanmm. 



which becomes brown on c®ollng : fpecific gravity 4,427 : 

 contains, oxyde of iron 46, oxvdc of titanium 45, with 

 fome filica and mangancfe. Gregory 



iseriaa- In fmall rounded grains, brownifh- black, hard, brittle, 

 of a conchoidal texture, not atira£led by the magnet. 

 Iferine, Journ de inmer^ai. i'^- p 6j, 

 Iferine. Thomjonchems 4. p. 124. 



Found in the Lnd of the river Ij'er'wi Bohemia^ of an iron-black 

 colour tending t© brown, and is hard, heavy, and brittle. 



KusbiUu Compact, reddifh brovi'-n, opake, of a foliated texture^ 

 forming a violet- black glafs with microcofmic fait. 



Titanite. Kir-wan m n 2- p. 329. 



Ruthile. Thomf n chem. 4. p- 120. 



Found in Hungaty^ the Pyreneesy the Alpf, and in Brifaftf, 

 generally cryftallized in 4 or 6-rided prifms or acicular: 

 colour red or brdvvnifh-red, with a brick or orange powder; 

 when fufed with carbonate of potafs and diluted with water, 

 a white powder psecip'tates : before the blowpipe it does not 

 melt, but becomes opake and brown : with borax it forms a 

 deep yellow glafs with a tinge of brown : it mixes with foda, 

 but does not form a tranfparent gUfs : fpecific gravity from 

 4,1 80. to 4,246 : when pure it is compofi d entirely of oxyde 

 of titanium. A variety called Anatafe is found in Dauphiny^ 

 varying in having its cryllais in an elongated o(^aheoron 

 whofe bafe is a fquare, with the fummiis complete or trun- 

 cated, and the faces tranfverfely ftriate : colour fteel-grey 

 verging to black or de- p blue: luftre vitreous, generally 

 opake; fpecific gravity 3,857. 



Nigrina^ Compa£l, hard, brittle, with a waxy luftre and foliated 

 texture, imperfe6tly foluble in muriatic acid, from 

 which it precipitates a clammy yellowifh mafs with 

 the addition of ammonia. 

 Calcareo-filiceous titanic ore. Ki'-nvan miner, 2. p, 331. 

 Nigrine, Titanite, Sphene. Thomjhn chem. 4. p 123. 

 Found near Pajface in Bavaria^ at Arendal in "Nornuay^ and 

 near >S/, Qothardy fometimes maffivc or diiTemin^teo, f.ime- 

 times cryftallized in (hort obtufangled 4 fided prifms ; colour 

 reddifh, yellowifli or blackifh brown, rarely whitifh-grey 

 with a whitifh-grey powder; before the blowpipe it is infu- 

 fible, but in charcoal it is converted into a black opake po- 

 rous Hag: fpecific gravity 3,510: contains, oxyde of tita* 

 n-iam 33, filica 35, lime 33. Klaproth. 



