Mineralogical Notices. 245 
| Art. XXIIL—Mineralogical Notices.* 
I. New Species. 
1. Triromite, (S. H. Weibye and N. J. Berlin, Pogg., Ixxix, 
299, 1850. )—Crystals tetrahedral ; surfaces smooth and having a 
reddish crust ; cleavage indistinct. Lustre submetallic vitreous. 
Color dull brown ; streak dirty yellowish-gray. Translucent only 
on the edges. H. between feldspar and apatite. G/=4:16—466.. ~* 
B.B, becomes white, intumesces somewhat, and sometimes de- Pa 
crepitates. In a matrass yields water and gives a weak fluorine 
reaction. With borax dissolves to a reddish yellow glass, which 
is colorless on cooling. With muriatic acid, when pulverized, 
yields chlorine and gelatinizes. Composition according to N. J. 
Berlin, (specific gravity of specimen, 4:24.) 
om = ‘ —_—. : fe Wa Ma, Cu, Sn, W, . 
2013 2:24 4036 15:11 046 515 O22 183 146 . sh (462 = 
loss by ignition 7°86=99°44, ; ; . 2g 
The production of chlorine on heating with,muriatie acid we 
shows that the mineral contains the cerium either wholly or in ne 
| part, as peroxyd. The mineral appears therefore to beahydrous © _ 
silicate of the peroxyds of cerium and lanthanum and of lime. : ei 
| This mineral is from the island of, Lamé near Brevig in Nor- °'- * 
way, and occurs with leucophane and mosandrite in a coarse @ = 
syenite. . 5 ea 
-., 8%.- * 
2. Caraptenre, (Weibye and Sjégren, ibid.)—Probablymono-- 
clinic ; found only in imperfect prismatic crystals of 120° nearly, .~ Pe 
showing sometimes traces of other vertical faces. Cleavage basal, «7 
perfect. Surfaces smooth, with little lustre; on fracture, weak ‘« "*, 
Vitreous. Color light yellowish brown. llatyéllow.” % 
Be paque. H. near that of feldspar ; 
Oxygen, 24:15 
