See Saus- 



See Pharma- 

 See MispicKEL. 



FELDSPATH OPALIX. 

 FfxdspAth Opalin, Haiiy. See Labra 



DORITE. 



Fei.dspath Ten ace, Haiiy. 



SURITE. 



Felsobanyite. See Gibbsite. 



Feminine. See Gem. 



Fer. French for Iron. 



Fer Arseniate, Haiiy. 

 cosiderite. 



Fer Arsenical, Haiiy. 

 (See also Leucopyrite.) 



Fer Arsenical Axotome, 

 See Leucopyrite. 



Fer Azure, Haiiy; Yivianite. 

 Blue Iron-earth. 



Fer Calcareo-siliceux, Haiiy. 

 Lievrite. 



Fer Carbonate, Dufrenoy, Levy. 

 Chalybite. 



Fer Carbure, Haiiy. See Graphite. 



Fer (Jhromate, Hauy^ hrochant See 

 Chromic Iron. 



Fer Hydro-oxice, Bournon. See Limo- 

 nite. 



Fer Magnetique, Brochant. See Mags 

 Netite. 



Fer Muriate, Haiiy. See Pyrosmalite. 



Fer Natif, Haiiy. See Native Iron. 



Fer Oligiste, Haiiy,. See Specular 

 Iron. 



Frr Oxalate, Levy. See Oxalite. 



Fer Oxide, Berzelius. See Specular 

 Iron. 



Fer Oxide 

 Chalybite. 



Fer Oxide 



Dufrenoy. 

 See 



See 

 See 



Carbonate, Hi 



auy. 



See 



See 



Hematite, Haiiy. 

 Brown Hematite (Limonite). 



Fer Oxide Hydrate, Haiiy. See 

 Goethite and Limonite. 



Fer Oxide Resinite, Haiiy. See Pitti- 

 cite. 



Feu Oxide Rubigineux Massive, Haiiy ; 

 Mo«Ass-ORE. See Bog Iron-ore. 



Fer Oxidule Titane, Haiiy. See Crich- 

 tonite. 



Fer Oxydule, Haiiy. See Magnetite. 



Fer Oxydule Titanifere, Haiiy. See 



ISERINE. 



Fer Phosphate, Haiiy. See Yivianite. 



Fer Spathique, Brochant. See Chaly- 

 bite. 



Fer Speculaire, Brochant. See Spe- 

 cular Iron. 



Fer Sulfure, Haiiy. See Pyrites. 



Fer Sulfure Aciculaire Radie, Haiiy. 

 See Marcasite. 



Fer Sulfure Arsenicalb, Haiiy. See 

 Arsenical Pyrites. 



•Fer Sulfure Aurifere, Haiiy. See 

 Auriferous Pyrites. 



FERROCOBALTINE. 337 



Fer Sulfure Blanc, Haiiy. See Mar- 

 casite. 



Fer Sulfure Capillaire, Haiiy. See 

 Millerite. 



Fer Sulfure Epigene. See Hepatic 

 Pyrites. 



Fer Sulfure Ferrifere, Haiiy. See 

 Pyrrhotine. 



Fer Sulfure Jaune, Dufrenoy. See 

 Pyrites. 



Fer Sulfure Magnetique, Haiiy. See 

 Pyrrhotine. 



Fer Sulphate, Haiiy. See Copperas. 



Fer Sulphate Rouge, Dufrenoy. See 



BOTRYOGENE. 



Fer Titane, Cordier. See Ilmenite. 



Fergusonite, Haidinger. Pyramidal : he- 

 mihedral. Occurs in pyramidal cr\ stals of 

 a brownish-black colour. Opaque, but in 

 thin laminae translucent, and of a pale 

 liver-brown by transmitted light. Lustre 

 dull externally; of fractured surfaces bril- 

 liantly vitreous and submetallic. Streak 

 pale brown. Fracture imperfect-conchoidal. 

 H. 5-5 to 6. S.G. 5-8 to b-m. 



Fig. 180. 



Camp. 6(Y, Ce) Ta. 





Ajialysis, by Hartivall x 





Tantalic acid 



. 47-75 



Yttria .... 



. 41-91 



Oxide of cerium . 



. 4-68 



Zirconia 



. 3-02 



Oxide of tin 



. 1-00 



Oxide of uranium 



. 0-95 



Peroxide of iron . 



. 0-34 



99-65 



BB alone infusible, but becomes deep 

 yellow, and subsequently pale yellow. Dis- 

 solves slowly in borax, foi-ming a glass 

 which is yellow while hot; but if saturated, 

 is rendered turbid by flaming, and acquires 

 a dingy yellowish -red colour. 



Locality. This rare mineral ivas dis- 

 covered by Giesecke, disseminated in 

 Quartz at Kikertaursak, near Cape Fare- 

 well, in Greenland. 



Name. In honour of Robert Ferguson of 

 Raith. 



Ferrocobaltine. a variety of Cobaltine 

 in w^hich three-fourths of the cobalt is re- 

 placed by iron. It is met with at the Ham- 

 burg Mine, Siegen, in Westphalia. 



