[johkstok-ellsworth] ANNAHEIM METEORITE 8Ô 



central part consisted of troilite while the outer portion consisted of 

 a mixture of troilite and graphite (PL XIV, Figs. 19, 20). The iron 

 near the nodule was unusually rich in the massive phosphide of 

 Analysis 3, a thin layer of the phosphide forming a lining between 

 the iron and the zone of troilite-graphite intergrowth, as shown in 

 diagram. 



s. s. 



Diagram of troilite— graphite nodule, about twice natural size. 



1. Iron rich in phosphide. 



2. Thin layer of phosphide. 



3. Troilite-graphite intergrowth. 



4. Chromiferous troilite. 



5. Indicating approximate position of grain of apatite. 



The central mass of troilite seemed to be pure except around the 

 outer edge where it gradually merged into the troilite-graphite mixture. 

 It exhibited one good cleavage or parting (PI. XI\^, Fig. 19) and was 

 not attracted by a horseshoe magnet. Small pieces of the crushed 

 material to the amount of . 5 gram were selected under the binocular 

 and on analysis yielded the following results: 



S. G. =4.814 at 19.65° in air. 



Fe 62.91 



Cr 0.96 



Ni 0.28 



Cu 0.16 



Co Trace 



S 35.45 



99.76 



