115 



The length of the individual crystals may be as much as 

 4 cm. They are semi-transparent and of a greyish-white 

 colour. 



Analcime. 



This mineral has been found only in very few fragments 

 in East-Greenland, from three different localities. As a rule, 

 the crystals are fairly large. They have not been found in 

 association with other zeolites. 



The east side of Henry Land. Here the analcime was 

 found crystallized in cavities in grey basalt. The crystals 

 usually fill the greater part of the cavity so that distinct faces 

 are rarely seen. The crystals are always icositetrahedra and 

 may attain a length of 1^2 cm. The part nearest the basalt 

 is clear and translucent, the rest of the crystals is whitish and 

 semi-transparent. 



Turner Sund, opposite the landing-stage. From here 

 was obtained a small fragment of a grey, compact basalt con- 

 taining numerous cavities , the walls of which are thickly 

 studded with crystals, the smaller cavities being quite filled up 

 with them. The size of the crystals is somewhat insignificant 

 i. e. up to 4^™. The crystal form is that of the icositetrahedron 

 with fairly well-developed, bright faces. The crystals are semi- 

 transparent and whitish. 



Кар Brewster. Numerous cavities were seen to occur 

 here in a dark-grey compact basalt, the walls of the cavities 

 being covered with analcime crystals varying in size from 1 to 

 jQmm The smaller cavities are usually quite filled up. In one 

 of the larger cavities, the spaces between the chabazite crystals 

 are partly filled with calcite The crystals are exclusively icosi- 

 tetrahedra. The faces are usually very well-developed and 

 bright in the case of the smaller crystals, in the larger ones, 

 however, they are rather strongly curved. The smaller crystals 

 are semi-transparent and greyish, the larger ones are white 

 and opaque. 



