388 



0. Andersen — Aventurine Feldspar. 



Table 6 













AbrsAlija ; n 



= 1-545 







Measured 



P 



<t> 



Form 



i 



r 



Calculated 



from 



measurements 



Calculated 



from 

 axial ratios 



Measured 



Calculated 



from 

 axial ratios 











Pol« 



) : Normal to 001 (p P and P ) 







45° 



4' 



22° 



11' 



20° 43' 



20° 44' 



57° 55' 







50 



32 



18 



2 



20 46 



58 17 







54 



32 



15 



2 



20 45 



58 26 





112 



62 



40 



10 



1 



20 47 



58 22 



58° 34' 





67 



26 



7 



24 



20 44 



57 49 







68 



40 



7 



3 



20 49 



58 24 











1 20 50 



58 27 







48 



30 



22 



31 



21 42 



21 42 



56 48 





112 



52 



16 



19 



21 



21 35 



56 7 



56 18 



62 



40 



12 



12 



21 29 



56 34 





66 



14 



10 



55 



21 41 



56 29 













Pole 



: Normal to Oil 



) (p M andtf> M ) 





150 







1 19 27 



19 30 



63 22 









1 19 40 



63 16 







45 



53 



17 



6 



19 20 



19 19 



63 55 



63 33 



150 



46 



12 



16 



39 



19 16 



63 26 











1 19 17 



63 29 





1 Direct measurement. 



with the a-axis. Projections of the long edges of lamellae 

 after (150) and (150) formed -77° or -84° with the a-axis. 

 Lamellae after (110) were generally elongated approximately 

 parallel to (001). 



