382 



W. E. Ridden — Mineralogical Notes. 



time has a pale yellowish gray color. The planes on both are 

 smooth but unsuited for correct measurement. 



These symmetrically compounded crystals of zircon and 

 xenotime were first noticed . by Zschau on specimens from 

 Hittero, Norway. In 1879 I found similar crystals at the 



Mills' gold mine* (placer washing), in Burke County, N. C. 

 The xenotime here figured is especially interesting from the 

 presence of the rare planes P (001) and d (100); both of 

 which have been observed by Flink on Norway crystals.f The 

 basal plane I have myseJf observed on a large crystal from the 

 bastnsesite locality % in Colorado. 



Of the seventeen distinct crystals of xenotime found at this 

 locality, seven (the largest) had zircons enclosed in parallel 

 position and one showed the plane 3-3 (311). Of the as- 

 sociated minerals, there were noticed two varieties of zircon : 

 the ordinary gray crystals and the soft dark-brown cyrtolite 

 variety with curved faces. The latter seems to be the only 

 kind as yet found compounded with xenotime. 



Xenotime-zircon, from Mitchell County, N. C. — On the 

 cyrtolite from the Deake mica mine I have lately observed a 

 single instance of xenotime occurring (in patches only) in par- 

 allel position ; resembling greatly the Henderson County crys- 

 tals above described. The associations were gummite and 

 uraninite. 



Xenotime, from McDowell Co., N". C — I have lately re- 

 ceived from Mr. T. S. Ash, several xenotime crystals that were 

 found near Dysartsville,§ McDowell County, N. C. ; one of 

 these is 14 mm in diameter. One clear brown crystal (3x5 mm ) 

 exhibits a type of form which I have not seen credited to 

 the species. The crystal is made up of only the one form 

 8 (1, 111), but the faces, while smooth and polished, are 



* This Journal, vol. xxi, p 244. 



% This Journal, vol. xxix, p. 248. 



8 Three miles west from the Mills mine above cited. 



f This Journal, xx, p. 273. 



