544 



Annals New York Academy of Sciences 



7.6A 



10. OA 



14. OA 



130 



120- 



110 



100 



90 



g 80 



o 

 o 



LU 

 (/) 



S 70 



Q. 



to 



8 60 



ORGUEIL, (C), ORIENTED SAMPLE 

 (U.S. NATIONAL MUSEUM, 

 WASHINGTON, D.O" ■ 



ORGUEIL, (A), ORIENTED 

 SAMPLE, (THE AMERICAN 

 MUSEUM OF NATURAL 

 HISTORY, NEWYORK, N.Y. 



26 



Figure 2. Record of manual, step-scanning counts in the low angle region. Norelco 

 X-ray diffractomeler, CuKa radiation, fixed time basis. Each point on the graph was counted 

 for 134 seconds, and the scale factor was 256. 





