ON SOME NEW OCCURR. OF TITANITE F. KRAGERØ. 37 



The type is shown in fig. 3, with the following forms: jlllj, 

 |T12J, jOlOi & jOOlj and fig. 4 with jllOj & jTllj also. 



Twinning seems to be rare, only two twins after the com- 

 mon law: jlOOj tw.plane, being found among a great many 

 single individuals. 



The faces are unsually dull but sometimes as if varnished, 

 of a redbrown colour, finely white-sprinckled : the thin section 

 shows the cause of the sprinckhng: once perhaps yellow or yel- 

 lowish green and translucent to transparent, the titanite is now 

 altered into a mixture of minute crystals of octahedrite (anatase) 

 in a groundmass of allotriomorphic granular calcite, with a little 

 quartz. The octahedrite (anatase) crystals are from 0"1 to 0*5 mm. 

 long, well developed with jlllj, jlOOj and sometimes jOOlj, of 

 a redbrown or purple colour, very splendent. They have been 

 identified by the angle 111 to llT, measured provisionally to 137° 

 in medium and in thin-section by the cleavage parallel to |111| 

 and jOOlj, and by the neg. optical character. 



One handspecimen from this locality contains, besides se- 

 veral of these pseudomorphs, an individual not yet wholly altered, 

 with part of yellowish translucent substance, strongly resemhng 

 the mineral from the third locality. 



Titanite from Frydensborg. 



This titanite is quite fresh, yellowish green to brownish yel- 

 low, translucent, and occurs embedded with calcite, rutile, he- 

 matite, etc., in a chloritic rock somewhat similar to the mother 

 rock' of the last named titanite. The rutile has been observed 

 here in allotriomoi phic grains forming a nucleus in the midst of 

 a titanite individual. 



Only single individuals have been found, which are of a 

 very persistent type, represented in fig. 5. 



The following forms have been noticed: jlll|, J131J, jlllj, 

 JT12J, |T13J, jT21j, j021j, jToij, jOOlj, jOlOj and jllOj, of which, 

 to my knowledge, }T21J is nowhere observed before- 



