241 



4. Chloruret of Potassium and Cadmium. [2 KC1 -f Cd Cl.] 



Rhombohedral. a : c= 1 : 1 '6483. 

 w B =l-58409 B = 1-58420 



w H =l-62083 e H =l-62100 



5. Chloruret of Ammonium and Cadmium. [2NH 4 Cl-f-CdCL] 



Rhombohedral. a : c= 1 : 1-5704. 

 W B = 1-59581 e B = 1-59610 



WH =1-64142 e H = 1-64180 



6. Nitrate of Soda. NaO, NO 5 . 



Rhombohedral. a : c= 1 : 1 1 903. 

 w B = l-57933 e B = 1-33456 



o H =l-62598 e H =l-34395 



7. Nitrate of Potash. KO, NO 5 . 



a B = 1-49939 /3 B = 1-49881 y B = 1-33277 

 a H = 1-54045 /3 H = 1-53848 y H = 1-34359 



8. Citric Acid. 3(C 4 H 2 O 4 , HO) + HO. 



a B = 1-50542 /5 B = 1-49432 y B = 1-48964 

 a H =l-52541 )3 H = 1-51398 y H =l'50978 



9. Sulphur. S. Prismatic, a : b : c 1 : 0-5264 : 0'4279. 



B = 2-22145 /8 B =2-02098 y B = 1-93651 

 a H = 2-32967 /3 H =2-11721 y H =2'01704 



10. Quartz. SiO 2 [for control]. 



w B =l-54106 e B = l-55012 



W H = 1-55806 e H = 1-56758 



11. Anatase. TiO 2 . 



w B =2-51118 eB =2-47596 



w H =2-64967 e H =2-58062 



12. Apatite. From Tumilla. 



W B = 1-63463 e B = 1-63053 



W H = 1-65934 e H =l-65260 



13. Beryl. From Elba. 



WB = 1-57028 c B = 1-56540 

 W H = 1-58884 C H = 1-58261 



