408 WITTICHITE. 



moreland {Jig. 460). Foxdale lead mine, 

 Isle of Man. — Welsh. Near St. Asaph, 

 Flintsliire, — Foreign. Tarnowitz, in Silesia. 

 Szlana, in Hungary. Leogang, in Salzburg. 

 Peggau, in Styria. The Altai Mountains, 

 Siberia. Sicily. Near Coquimbo, Chili, &c. 



Name. After Dr. Withering, by whom 

 it was first discovered at Anglezarke, near 

 Cliorley in Lancashire. 



Witherite is employed extensively in 

 chemical Avorks, and in the manufacture of 

 plate-glass, porcelain, &c. It is also ex- 

 ported to France, where it is used in the 

 manufacture of beet-root sugar. 



Brit. Mas., Case 41. 



31. P. G. Horse-shoe Case, Nos. 255 to 

 265. 



WiTTiCHiTE, Dana, v. Kobel. Occurs 

 massive and disseminated ; also coarsely 

 columnar, or in aggregations of imperfect 

 prisms. Colour steel-grey to tin-white, Avith 

 a pale lead-grey tarnish. Streak black. 

 H. 3-5. S.G. 5. 



Comp. Cupreous bismuth, or -G-u S + Bi^ S. 



Analysis, by Klaproth : 



Bismuth .... 47'24 



Copper 34'66 



Sulphur .... 12-58 



94-48 

 BB on charcoal, decrepitates, fuses, and 

 yields a bismuth slag ; and, after roasting 

 with soda, a globule of copper. 



Locality. Cobalt mines, near Wittichen 

 (whence the name Wittichite), in Baden. 



WiTTiNGiTE. An altered form of Rho- 

 donite (probablv), and related to Stratopeite. 

 S.G-. 2-71 to 2-76. 



Comp. 2(i^e #n) Si + 3H. 



Locality. Wittinge, in Finland. 



WoDANKiES, A variety of Gersdorffite, 

 from Topschau, in Hungary, in which Lam- 

 padius supposed he had discovered a new 

 metal, Avhich he named Wodan. 



WcERTHiTE, Dufrenoy, or Worthite, 

 Hess. See Worthite. A variety of Silli- 

 manite, resembling Kyanite. Colourless. 

 Lustre vitreous or pearh\ Translucent to 

 opaque. H. 7-25. S.G. 3. 



Comp. 2A1 si + H. 



Analysis, by Hess : 



Silica 40-58 



Alumina .... 53"50 

 Magnesia . . . .1-00 

 W^ater 4-63 



99-71 



BB infusible. 



WOLCHONSKITE. 



Locality. The neighbourhood of St. 

 Petersburg, from loose blocks. 



WoHAN. According to Kirwan, the 

 Chinese name for the loose or friable varieties 

 of Calamine. 



Wohlerite, Scheerer. Rhombic. Occurs 

 in indistinct tabular crystals, and in strongly 

 striated six- or eight-sided prisms. Also 

 massive, in angular grains. Colour various 

 tints of yellow, inclining to red, brown, or 

 grey. Translucent., Lustre vitreous in- 

 clining to resinous. Streak yellowish-white. 

 Fracture conchoidal. Splintery. H. 5-5. 

 S.G. 34L 



Comp. ^Z-r^Cb + 5(NaSi + Ca5Si)( Scheerer). 



Analysis, by Scheerer : 



Silica . " . . . . 30-62 

 Columbic acid . . . 14-47 

 Zirconia .... 15-17 

 Peroxide of iron . . . 2-12 

 Protoxide of manganese . 1-55 



Lime 26-19 



Soda 7-78 



Water 0-24 



98-14 



BB fuses to a yellowish glass. With 

 fluxes affords reactions of iron, manganese, 

 and silica. 



Dissolves readily in warm concentrated 

 muriatic acid, with separation of the silica 

 and columbic acid. 



Locality. Near Frederiksvarn and Brevig, 

 in Norway, in Zircon-syenite, with Elagolite. 



Name. In honour of the Hanoverian 

 chemist, F. Wohler, of Gottingen. 



Brit. Mus., Case 38. 



WoLCHiTE, Haidinger. Occurs in short 

 rhombic prisms ; also massive. Colour black- 

 ish lead-grey. Brittle. Fracture imperfect- 

 conchoidal. H. 3. S.G. 5-7 to 5-8. 



Analysis,\)y Schrotter : 



Sulphur 



. . 28-60 



Lead . 



. 29-90 



Copper 



. 17-35 



Antimony . 



. 16-65 



Arsenic 



. 604 



Iron 



. •. 1-40 



99-94 

 BB on charcoal, fuses with effervescence, 



to a lead-gi-ey metallic globule, which, with 



soda, yields metallic copper. 



Locality. Iron mines, at Wolch (whence 



the name Wolchite), or St. Gertraud, in the 



valley of Lavant, in Carinthia. 



WoLCHOXSKiTE, Berthier. Wolchons- 



KOITE, Kenngott. Massive. Colour bluish- or 



blackish-green, passing into grass-green. 



