748 



126 



Nr. 



Hrystabystein 



Brydningsforhold 



D 



19 



23 



24 



26 



26 



27 



30 



29 



28 



31 



Am H^P 0' 



Am Z/2 As 0' 



K' ijs 0«* 



Rb^ S2 O** 



üa S2 06 + 4 Æ2 



Sr S^ 0^ + iH'' 



Pb S' 0^ + iH'' 



Ni SO* +&B^ 



NiSeO' +6fi2 



Zn SeO" +&m 



BeSO* + in\o 



Tetragonal 



Tetrngonal 



Bexagonal 



Hexagonal 



Bexagonal 

 Hexagonal 

 Hexagonal 



Tetragonal 

 Tetragonal 

 Tetragonal 



Tetragonal 



1 .5468 



1 .5496 



