29Q 



METALS, 89. Zincum. 



Carbonai of zinc. Thomfon chem, 4. p, 87. 



Found in Flintjhire and Somerfetjhirey Carinthia and Siheria^ 

 fometimes in folid mafi'es, ibmetimes ftaladitical or cryrtai- 

 lized : colour grey, with often a tinge of blue, gteen or yel- 

 low : it differs from the next in not gelatinizing with acids : 

 contains oxyde of zinc 65,2* carbonic acid 35>2. Smithfon, 



siliceum* White, fibrous, feparating into concentric concretions, 



glatiaizing with acids. 

 Found at WanUck head in Scotland^ and differs from calamine in 

 containing frequently one-third part of filica : all the fpecies 

 which contain filica are more or lefs eledric by heat, 



spatosum. Lamellar, diaphanous, decrepitating fomewhat before the 



blowpipe but not emitting fulphurous vapours, of a 

 common or globular form. 

 Spatous calamine. SchmeiJJ'er 7ni»eraL 2, p, 192. 

 Zinc fpar. Kir <vo an mineral, i. p. 236. 



Found ih Nottingham/hire ^ Auftria^ Carinthia^ Sec. colour white 

 with often a mixture of greenifh, yellowiih, reddiHi or black- 

 ' i(h : it always contains fome filica, but not in fuch abundance 

 " as tocaufe it to flrike fire with fteel. 



cryjtallittum Lamellar, diaphanous, decrepitating fomewhat before the 

 blowpipe but not emitting fulphurous vapours, of a 

 cryflalline form. 



Zincum crylUliifatum. 5yy?. «^z/. xii. j. />. 125. «, i. 



Zinc fpar, Kirivan mineral, l. p. 236. 



Spatous calamine. Schmeif\er miner. 2. p. 192, 



Found with the laft, of which it is only a cryflallized variety: 

 the cryftals are fomeiimes dil\in£l but oftener confufed, in 

 rhomhoidal 4 fided prifms or reftangulair 4 or 6-fided plates, 

 or prifms or pyramids varioully modified. 



Calaminff' 

 riu 



Soft, tinged with fome colour, of a common form and 

 earthy texture, opakc, without lullre, totally foluble 

 in nitric acid. 



Zincum fubterreum. Syst. nat. xii. 3,^. 126. ». 5. 



Zincum lerreftre. IValLJyft, 2. p 216. a. 3. 



Lapis calaiiiinaris. Kirivan miner. 2. p» 939. 



Oxyd of zinc. Calamine Hchrr.e fur miner, 2. ^, 191. 



Cai<imine. Thomfon chem. 4. p. 80. 



Found in various patts of Great Britain^ Neiv 9>pain, Poland, 

 Silelia, Saxofiyi Bohemia, Auffria, Sec. mafiive, dilTeminated, 

 or varioufly imitaiive; colour ^reyifh, greenifli, yellowifh, 

 reddifh, or brownilh . frafture earthy, iometimcs fplincery, 

 rarely conchoi ia; : before the blowpipe it decrepitates but 

 does not mill, and fomctimesdtervefces with acids: fpscific 



