MIM.I;\I.S \\IIKII BECOME MA<;M;TIC 633 



.1 . l-'nxiltiliti/ below 4. 



1. Cclatiiiixrs with HCI. 



ALLANITE, (Ca.Fe) 2 (Al.Ce.Fe) 2 (A10H)(SiO) 4 ; Brown 

 to pitch-black ; Str. Gray ;'H. 5.5-6 ; G. 3.90 ; F. 2.5 ; 

 V; p. 468. 



ILVAITE, CaFe 2 (Fe 2 .OH)(SiO 4 )2; Iron-black; Str. 

 Black; H. 5.5-6; G. 4.05; IV; p. 472. 



2. Do not gelatinize with HCI. Shows tungsten, 6, p. 587. 



WOLFRAMITE, (Fe.Mn)WO 4 ; Black; Str. Black; 



H. 5.5; G. 7.35; F. 3-3.5; V; p. 542. 

 Reinite, FeWO 4 ; Blackish brown ; Str. Brown ; H. 4 ; 



G. 6.64; F. 3-3.5; II. 



3. Shows titanium ; b, p. 570. 



Neptunite, (Na.K) 2 (Fe.Mn)Ti(SiO 3 ) 4 ; Black; Str. 



Brown; H. 5-6 ; G. 3.23; F. 3-4; V. 

 B. Fusibility above 4. 



1. In the closed tube yields water. 



LIMONITE, 2 (Fe 2 O 3 ).3 H 2 O ; Dark brown; Str. 

 Yellow-ocher ; H. 5-5.5 ; G. 3.80 ; p. 363. 



GOTHITE, Fe 2 O 3 .H 2 O; Brown to black; Str. Yellow- 

 ocher ; H. 5-5.5 ; G. 4.35 ; p. 363. 



TURGITE, 2Fe 2 O 3 .H 2 O; Reddish-black; Str. Indian- 

 red; H. 5.5-6; G. 4.14; p. 363. 



2. In the closed tube yields no water. 



a. Fused in a soda bead on wire in the O. F. with a 

 little niter shows green sodium manganate; 6, 

 p. 574. 



FRANKLINITE, (Fe.Zn.Mn)O.(Fe.Mn) 2 O 3 ; Iron-black; 

 Str. Dark brown ; H. 6 ; G. 5.15 ; I ; p. 375. 



Jacobsite, (Mn.Mg)O(Fe.Mn) 2 O 3 ; Black; Str. Brown- 

 ish; H. 6; G. 4.75; I. 



Bixbyite, FeMnO 3 ; Black; Str. Black; H. 6-6.5; 

 G. 4.91; F. 4.5; I. 



The powdered mineral fused with soda on coal yields 

 an antimony coat. 



Melanostibian, 6 (Fe.Mn)O, St^Os ; Black; Str. Cherry- 

 red; H. 4; G.? ; IV? 



6. Fused with soda, boiled in 1 cc. strong HCI, and reduced 

 with tin shows titanium ; 6, p. 570. 



ILMENITE, FeTiO 3 ; Iron-black; Str. Black; H. 6; 

 G. 5.18; III; p. 346. 



