KILLIXITE. 



117 



It intumesces before the blow-pipe, becomes white, and 

 melts imperfectly into a coherent mass. It consists, ac- 

 cording to STEINMANN and STROMEYER, of 



Silica 37-53 36-154. 



Alumina 26-48 28-669. 



Protoxide of Manganese 17*09 19-160. 



Protoxide of Iron 5-64 2-290. 



Lime 0-00 0-271. 



Fluoric Acid 0-00 0-470. 



Water 11-36 10-780. 



It occurs in granite at Schlaggenwald in Bohemia, accom- 

 panied by octahedral Fluor-haloide and rhombohedral 

 Quartz. 



KILLIN1TE. 

 KiUinite of Taylor. PHILL. p. 322. 



Irregular imbedded crystals, massive. 



Cleavage parallel to a rhombic prism of 135 (near- 

 ly), and its short diagonal, PHILL. Fracture 

 uneven. 



Lustre vitreous, faint. Colour greenish-grey, often 

 tinged brown by oxide of iron. Streak yellowish- 

 white. Faintly translucent. 



Sectile. Hardness = 4-0. Sp. Gr. = 2-698. 



Its analysis by Dr BARKER yielded 



Silica 52-49. 



Alumina 24-50. 



Potash 5-00. 



Oxide of Iron 2-49. 



Oxide of Manganese 0-75. 



Water 5-00. 



with 0-50 of lime, magnesia, and iron. It becomes white 

 before the blowpipe, intumesces, and melts into a white 

 enamel. It occurs in granite veins traversing mica-slate, 

 at Killiney near Dublin in Ireland, along with prismatic 

 Triphane-spar and rhombohedral Quartz. 







