80 THE ROYAL SOCIETY OF CANADA 



Analysis 2 — Lamellae of High Nickel-irox Alloy 



S. G 7. 9 at 16.50°C. in air. % 



Fe 60.74 



Ni 37.38 



Co 0.67 



Cu 0.64 



P 0.65 



Cr, Mn, V, Ti, Si.) ^, , 



' , ' ' ' > Not detected 



Insol » 



C Minute amount probably 



present 



100.08 



From metallographic and microscopic examination of the complex 

 lamellar structures it seems likely that the P found is due to the 

 presence of attached or partially resorbed microscopic crystals of 

 (FeNijsP (Analysis 4). No doubt some were also included loose in 

 cavities. If the analysis be recalculated on this assumption using 

 the theoretical composition of (FeNi)3P and calculating Co and Cu 

 as Ni we obtain the following values: 



C/ 



/c 



Fe • 61.55 



Ni 38.45 



100.00 



This is evidently the same alloy as the "Taenite" isolated by Fletcher 

 from the Youndegin meteorite,^ and it answers well as to structure 

 and mode of occurrence to the general description of "Taenite" 

 according to Cohen. - 



It would have been possible to prepare a better sample of this 

 material by selecting only the single lamellae which are usually quite 

 pure, but unfortunately the complex forms with multiple lamellae 

 had to be included to make up sufficient weight, and these were very 

 apt to carry crystals of phosphide. 



Physical Properties 



The alloy has a brilliant tin-white colour with marked resistance 

 to oxidation. In samples heat tinted by the method of Stead it 

 shows up very beautifully with only a yellow tint even when the 



iMineralogical Magazine, vol. XII, No. 56. 

 ^Meteoritenkunde Heft I, page 99 er seq. 



