126 



The size of the crystals of type I is generally more con- 

 siderable than of those of the following type ; the crystals from 

 Tu top Agdlerkofia may reach to several cms., and they 

 appear rather considerable, as they are often combined in stel- 

 lated groups; they are, however, rather rarely of a distinct 

 crystalline form, and it is still more rarely to succeed in get- 

 ting them entire out of the surrounding mass in which they 

 are very firmly imbedded. The crystals from Kangerdluar- 

 suk are smaller (up to !'='"■), but they are of a good crystalline 

 form and rather easily loosened. 



Type II comprises all the other crystals, especially the 

 mentioned, quite small ones (I — 5°*"^) from Kangerdluarsuk, 

 further the small crystals from Naujakasik, of about the 

 same size (Winther var. A), and finally the mentioned large 

 crystal (ca. 5'='°) from Siorarsuit. 



The connection with type I is formed by the crystals from 



Kangerdluarsuk that are 

 sometimes very like to those of 

 the preceding type from the same 

 place. Generally, however, they 

 are isodiametric or flattened after 

 />{ûl0}, and sometimes very 

 simple consisting only of the 

 three pinacoids. It is this form 

 that, when viewed from o{lOO}, 

 may appear as a cube, when 

 viewed from c(00l} as a rhom- 

 bohedron, while it, when viewed 

 from è{010} the angles of which are 95° 45=^/4' and 84° l-iV4', 

 is seen to occupy a position between these forms. Most 

 frequently the forms are more complicated, and among the 

 supervening faces are above all to be noted ^г(|01), r(l02} 

 and ^[l 1 l); these six faces form a very often returning com- 

 bination shown in figure 10. 



-o. 



Fig. 10. Schizolite. 



