196 



form in all these minerals. It is most frequently found in 

 arfvedsonite, through which it passes in all directions. 



By examining the thin sections it was found, that the 

 britholite is penetrated by aegyrite- needles, which are not 

 placed in distinct positionjS in reference to the separate britho- 

 lite individuals. 



Among the single individuals a grayish brown amorphous 

 substance is often found , probably a product of alteration of 

 the britholite. In some cases this substance ramifies into the 

 single individuals and makes the transverse sections opaque, 

 even at a very small thickness of the sections. 



Schizolite, a new mineral. 



By Chr. Winther. 



This mineral, which G. Flink found in 1897 in the Juliane- 

 haab district in South Greenland , was provisionally designated 

 by him as «pink columns» (Meddelelser om Grønland XIV, 

 257). It is found in the locality of Tutop Agdlerkofia in 

 grained albite. Besides a column of this mineral, embedded in 

 the pegmatite from the nephelite-syenite which exists at Kau- 

 ger dinar suk, is found on a single piece in Fl ink's collec- 

 tion from that locality. 



The new mineral, on account of its properties, is allied 

 to the pectolite group and may best be characterised as an 

 especially manganous species of the same. 



The name has been formed from aj^iZo) -, cleave, on 

 account of the minerals marked cleavage. 



Physical properties. The schizolite appears as prismatic 

 columns varying from pink to brown , which are found partly 

 separate, partly in radially columnar groups spread in the mass 

 of grained albite. The color is originally quite light red, but by 

 alteration it becomes more brownish. The columns are varying 



