134 EULYTINE. 



Protoxide of manganese . 2*35 



Chlorine .... 1-11 



Volatile matters . . . 1-83 



99-24 

 Eukolite is a variety of Eudialite, but dif- 

 fering from it in containing small quantities 

 of oxides of Cerium and Lanthanium. From 

 its crj'stallographic and optical properties 

 Descloiseaux regards it as hexagonal, and 

 near Eudialite, the axis being negative, in- 

 stead of, as in the latter mineral, positive. 



EuLYTiNE. Breithaupt. Cubical ; tetra- 

 hedral. Usually occurs in minute trigonal 

 dodecahedrons, or in implanted globular 

 masses rarely exceeding a pin's-head in size. 

 Colour dark hair-brown, yellowish-grey, 

 greyish-white or wax-yellow. Lustre resi- 

 nous or adamantine. " Semitransparent or 

 opaque. Streak yellowish-grey. Rather 

 brittle. Fracture uneven. H. 4 5. S.G.5-9to 6. 



Camp. Bi2 bi^, with fluoride and phos- 

 phate of iron. 



Analysis, from Schneeberg, by Kersten ; 

 Oxide of bismuth . . 69-38 



Silica 22-23 



Phosphoric acid . . . 331 

 Peroxide of iron . . . 2-40 

 Peroxide of manganese . 0*30 

 Hydrofluoric acid and water I'Ol 



98-60 



BB decrepitates, gives off arsenical 

 fumes, and fuses to a dark yellow mass. 



Localities. Braunsdorf, near Freiberg ; and 

 the neighbourhood of Schneeberg in Saxony, 

 in Quartz, accompanied by Cobalt and 

 Native Bismuth. Schemnitz in Hungary, 

 of a yellowish -green colour; disseminated 

 in oxide of iron. 



Brit. Mus., Case 26. 



EuMANiTE, Shepard. A variety of 

 Brookite found in the albite vein at Ches- 

 terfield, Massachusetts. 



EupHOTiDE-jADiEN. The term applied 

 by Brongniart to a mixture of Saussurite 

 (the Jatle of De Saussure) with grass- 

 green Smaragdite. 



EuPHYLLiTE, Silliman, Jr. A pearly- 

 white mineral, forming apparently hexa- 

 gonal laminae, not so easily separated as in 

 Mica. Laminae rather brittle, inelastic, and 

 transparent. Lustre pearly ; of basal plane 

 very brilliant, resembling Heulandite, 

 Colour of cleavage-face pure white, of sides 

 greyish, sea-green or whitish. H. 3. S.G. 

 2'963. 



Comp. RSi-!-2A15 til2 + 3H. 



EXANTHALOSE. 

 Analysis, by J. J. Crooke : 



Silica 39-04 



Alumina .... 57*38 



Lime 3-19 



Magnesia ..... 1-09 

 Soda . . . . . 0-87 

 Water 4-56 



100-10 



BB exfoliates; fuses at the edges of 

 thin laminae, and emits a strong light. 



Localities. Union ville, Pennsylvania, asso- 

 ciated with black Tourmaline and Corundum. 



Name. From f^*. beautiful, and <f>yXkov^ a 

 leaf; in allusion to its beautiful foliae. 



Brit. Mus., Case 19. 



EuPYKCHROiTE, Emmons. A compact, 

 concretionary, and subfibrous variety of 

 Apatite, found at Crown Point, Essex co., 

 U. S. S.G. 3-053. 



EuTOMous Cobalt Pyrites, Mohs. See 

 Bkeithauptite. 



EuxENiTE, Scheerer, Dufrenoy. Rhom- 

 bic.^ Occurs in rectangular prisms, with 

 the lateral edges replaceil, but commonly 

 massive, without any traces of cleavage. 

 Colour brownish-black, with a metallic, 

 waxy lustre. Streak reddish -brown. Trans- 

 lucent in thin splinters, showing a reddish - 

 brown colour, paler than the streak. Frac- 

 ture conchoidal. H. 6o. S.G. 4-6 to 4-76. 



Comp. About 4(Ca, Mg, Ce, La, Y, U) 



Ti,Ta. (Gmelin) 



Analysis, by Scheerer : 



Titanic and colurabic acid . 57-60 



Yttria 25-09 



Protoxide of uranium . . 6-34 

 Protoxide of cerium . . 2*18 

 Oxide of lanthanum . . 0*96 

 Lime . • . . . . 2-47 

 Magnesia .... 0-29 

 Water 3-97 



98-90 



BB infusible: with borax, in the outer 

 flame, yields a brownish -yellow glass, 

 which, if a sufficient quantity of the mineral 

 is dissolved, retains its colour on cooling, 

 and also in the inner flame; by flaming it 

 is converted into a yellowish enamel. 



Localities. Norway, at Jolster, and near 

 Tvedenstrand. 



Name. The name Euxenite, from «u. wel- 

 come, and I'-vo;, guest, was given by Scheerer, 

 in allusion to its raritj'. 



Brit. Mus., Case 38. 



EuzEOLiTH. See Heulandite. 



Exanthalose, Beudant. A variety of 



