632 MINERALOGY 



Tin, Sn; Tin-white; Str. Tin-white; H. 2; G. 7.2; 



F. 1 ; IV. 



Palladium, Pd ; Steel-gray ; Str. Gray ; H. 4-4.5 ; G. 



11.55; F. Dif.jl. 

 Iridosmine, Ir, with Pt, Os, Rh ; Tin-white ; Str. Gray ; 



H. 6-7 ; G. 19-21 ; Inf. ; III. 

 Iridium, Ir, with Pt ; Tin-white ; Str. Gray ; H. 6-7 ; 



G. 22.7; F. Inf.; I. 



Awaruite, FeNi 2 ; Iron-black; Str. Black; H. 5.5-6; 



G. 8.3 ; Massive. 

 Josephinite, Fe 2 Ni 5 ; Color, Gray; Str. Steel-gray; H. 



5 ; G. 6.20 ; F. Inf. ; Mass. 



VIII. The powdered mineral dissolved in borax on wire yields a 



manganese reaction, a, p. 574. The minerals 

 included here are infusible. 



A. In the closed tube yields water. 



MANGANITE, Mn 2 (OH) 2 O 2 ; Iron-black; Str. Dark 



brown ; H. 41 ; G. 4.3 ; IV ; p. 340. 

 1. With soda in R. F. on coal yields a zinc oxide coat; a, 



p. 573. 

 Chalcophanite, (MnZn)Mn 2 O 5 .H 2 O; Bluish black; Str. 



Dark brown ; H. 2.5 ; G. 4 ; III. 

 Pyrochroite may at times be very dark and yield a dark 



streak, p. 362. 

 Psilomelane and pyrolusite below may contain a little 



water. 



B. Yields little or no water. 



PYROLUSITE, MnO 2 ; Iron-black; Str. Black; H. 



2-2.5 ; G. 4.75 ; Pscudomorphs ; p. 352. 

 PSILOMELANE, MnO 2 , with MnO; Iron-black; Str. 



Brownish ; H. 5-6 ; G. 4.3 ; Massive ; p. 368. 

 BRAUNITE, MnMnO 3 ; Black ; Str. Brownish black ; 



H. 6-6.5 ; G. 4.8 ; II. 

 HAUSMANNITE, Mn 3 4 ; Black; Str. Brown; H. 



5-5.5; G. 4.8; II. 

 Polianite, MnO 2 ; Steel-gray; Str. Black; H. 6-6.5; 



G. 5.00; II. 

 Pyrophanite, MnTiO 3 ; Deep red ; Str. Ocher-yellow ; 



H. 5 ; G. 4.54 ; Cl. Rhom. ; III. 



IX. The -powdered mineral heated in the R. F. on coal becomes 



magnetic. 



