654 REPORT OF NATIONAL MUSEUM, 1897. 



Chalcopyrite — CuFcS: — (iorclou mine, Yuoval, New South Wales. (Cat. No. i7996, 



U.S.N.M./ 

 Bcrtbierite— FeSb,S4— Braunsdorf. Saxony. (Cat. No. 12997, U.S.N.M.) 

 Bouinonite— PbiCuiSbiiStt— Kapnik, Hungary. (Cat. No. 45670, U.S.N.M. ) 

 TetralK'drito—CusSbjS;— Cornwall, England. (Cat. No. 11054, U.S.N.M. ) 

 Tennantite—Cn.AsjS-— Cornwall, England. (Cat. No. 14081, U.S.N.M.) 

 Barite—BaSO,— Westmoreland, England. (Cat. No. 49798, U.S.N.M.) 

 Celestite-SrS( ),— Girgenti, Sicily. (Cat. No. 49798, U.S.N.M.) 

 Anglesitt'— PbS04— Moute Poni, Sardinia. (Cat. No. 51976, U.S.N.M. ) 

 Cypsum-CaSO,.2HjO— Hillsboro, New Brunswick. (Cat. No. 1.5705, U.S.N.M.) 

 Alunite— K(A10):j(SO|):.3H.O— Rosita Hills, Custer County, Colorado. (Cat. No. 



51710, U.S.N.M.) 



Brocliautito — Cu4(OH)oS04 — Horn silver mine, Frisco County, Utah. (Cat. No. 



81120, U.S.N.M.) 



Iron and its combinations. — The compouud.s of iron occur widely dis- 

 seminated mid in great numbers. Combined witli sulpliur, arsenic, 

 and other elements it forms a number of compounds, such as pyrite, 

 FeSj; pyrrhotite, FeuSi^; chalcopyrite, FeCuSij, and arsenopyrite, 

 Fe(As,S)>. With oxygen it forms anhydrous and hydrous compounds, 

 such as hematite, Fe20;i, and limonite, Fe40;i(0H),;. Alone or with 

 other elements it enters into the composition of numerous oxidized 

 species, as in siderite, FeCOa: griinerite, FeSiO^; tautalite, FeTa^O^; 

 strengite, YeFO,:2lI^O; coquimibite, (Fe,Al).(S04)>9Il,0, and wolfram- 

 ite, (Fe,Mn)W04. Combined with chlorine it is found in lawrencite, 

 FeCli, and molysite, FeCla. 



Examples. 



Pyrite— FeSi— Mexico. (Cat. No. 8216, U.S.N.M.) 



Marcasite-FeS,— Cornwall, England. (Cat. No. 44S68, U.S.N.M.) 



Pyrrhotite — FeuSi^ — Gaj) mine, Lancaster County, Pennsylvania. (Cat. No. 80841, 



U.S.N.M.) 

 Leucopyrite -FesAs^— Ellenville, New York. (Cat. No. 81827, U.S.N.M.) 

 Arsenopyrite— Fe(As,S)2— Freiberg, Saxony. (Cat. No. 82347, U.S.N.M.) 

 Hematite— FejOa— Elba. (Cat. No. 48469, U.S.N.M.) 

 Limonite— Fe40;i(OH„)-Saxouy. (Cat. No. 2321, U.S.N.M.) 



Magnetite— Fe304 — Mineville, Essex County, New York. (C^at. No. 50469, U.S.N.M.) 

 Chromite — FeCr^O^ — Sonoma County, California. (Cat. No. 15972, U.S.N.M.) 

 Frankliuite — ZuFe204 — Franklin, Sussex County, New Jersey. (Cat. No. 47676, 



U.S.N.M.) 

 Siderite— FeCO;,— Freiberg, Saxony. (Cat. No. 49843, U.S.N.M.) 

 Chalcodite—H3(FeOH)fiAl(Si:,08);j— Antwerp, New York. (Cat. No. 47377, U.S.N.M.) 

 Columbitc— FeCb^Oo- Stoueham, Maine. (Cat. No. 13824, U.S.N.:\I.) 

 Tantalite— FeTaiOa — Etta mine, Pennington County, South Dakota. (Cat. No. 



48355, U.S.N.M.) 

 Dufreuitc—Fes(OH)^(PO,):i— Rockbridge County, Virginia. (Cat. No. 82405, 



U.S.N.xM.) 

 Strengite— FeP04.2H.20—Waldgirmes, Giessen, Germany. (Cat.No.51621, U.S.N.M.) 

 Vivianite— Fe;iP.,08.8H20— Mullica Hill, New Jersey. (Cat. No. 45217, U.S.N.M. ) 

 EU'onorite — Fe:j(0H):i(P0.|)j.2i^H20 — Waldgirmes, Giessen, Germany. (Cat. No. 



47006, U.S.N.M.) 



Cacoxeuite — Fej(0H):;P04.4iH-O — Nobles mine, Ijaucaster County, Pennsylvania. 



^Cat.No.4322, U.S.N.M.) 

 Scorodite— FeAs0.,.2H2U— Red Mountain, Colorado. (Cat. No. 81190, U.S.N.M.) 



