SOME CRYSTAL MEASUREMENTS OF CHILLAGITE. 



211 



TABLE I. 



Face. 



Miller 

 Indices. 



Measured <fi. 



E<f>. 

 1 



Measuied! 

 p. 



V 



Calcul- 

 ated 



4> 



Calcul- 

 ate! p. 



P<f> \ 



s P . 



C 



001 



/ / 



O 1 







2 





o 







O 1 







c' 



001 



- 



2 



17 



2 



- 







- 



17 



e 



Oil 



+5 



i 



2 



57 16 



^ 







56 49 



5 



27 



y 



119 



-45 38 



3 



13 49 



1 



45° 



13 30 



38 



19 



*.v 



J3 



-47 5 



3 



14 11 



4 



>> 



tf 



2 5 



41 



*y 



}> 



+46 13 



3 



14 21 



4 



i3 



» 



1 



51 



*y 



>f 



-43 10 



1 



14 7 



4 



>> 



?J 



1 50 



37 



f 



115 



|+44 58 



- 



23 17 



\ 



,, 



23 23 



2 



5 



f 



)f 



|-45 2 



~k 



23 20 



- 



)t 



}J 



2 



3 



•c 



t) 



+45 9 



i 



23 23 



i 



"2 



„ 



,, 



9 







f 



,, 



-44 49 



i 



23 23 



2 



,, 



1 „ 



11 







Crystal No, 2. — The chief forms developed are c, 9, x&nd 

 f . Of these c and f are the dominant ones, the latter 

 being symmetrically developed. In the case of the forms 

 and x only one face of each was found. The form y is 

 represented by three faces, but only one of these is reason- 

 ably well developed. The faces represented by the forms 

 0,X and x were not observed on any other crystal measured. 

 The chief forms are represented in figs. 1 and 2, Plate XVI. 









TABLE 



II. 













Face. 



Miller 

 Indices. 



Measured (^ ; E<£. j 



Measured 

 p. 



V 



Calcul- 

 ated 



Calcul- 

 ated p . 





Bp. 



C 



001 



2 



o 







i 



2 





O 1 







o / 







c' 



001 



4 





4 



1 



- 







- 



4 







32 



44 1 



65 



3 



5 







66 27 



44 



21 



X 



94 



10 1 



73 



46 



2 



J, 



73 48 



10 



2 



*y 



1 19 



+43 8 1 



12 



53 



i 



2 



45° 



13 30 



1 52 



37 



y 



V 



- 44 38 I - 



13 



26 



- 



„ 



f) 



22 



4 



*y 



)) 



+46 35 



- 



14 



38 



- 



„ 



»> 



1 35 



1 8 



*£ 



1 16 



+43 12 



4 



20 



38 



8 





19 49 



1 48 



49 



*£ 



»* 



-43 7 



- 



21 



26 



- 





»» 



1 53 



1 37 



£ 



1 15 



-44 30 



- 



23 



16 



- 



)t 



23 23 



30 



7 



>> 



,, 



+45 13 



i 



| 23 



34 



2 



f) 



t> 



13 



11 



„ 



» 



+45 17 



- 



j 23 



42 



1 





M 



17 



19 



f 



1 15 



-45 51 



- 



1 23 



45 



- 







51 



22 



*d 



1 14 



-41 48 



- 



| 28 



8 



- 





28 23 



3 12 



22 



# 



j> 



+45 20 



i 



2 



28 



45 



2 





)5 



20 



1 3 



*P 



1 11 



-46 



1 



57 



19 



~2 



}) 



56 49 



1 



30 



>y 



>i 



+45 50 



t 



i 5 7 



32 



3 



>> 



,, 



50 



43 



*X 



3 43 



+36 2 





67 



19 



2 



36°52 



68 22 



50 



1 3 



* , 



.. 



+36 1 h ' 72 



43 



2 



„ ' „ 51 



4 21 



