Mineralogical Notices. 247 
5. Ditunire, associated with Diaspore, (A. Hutzelmann, cited 
in Pogg., Ixxviil, 575, from the Bulletin of the Freunden der 
Naturwiss. in Vienna. \—Ther re are three substances forming to- 
gether the gangue of the diaspore of Schemnitz:—One (A 
gray, vy ‘Greenish, with a weak greasy lustre and faint ane 
lucence 2-735. secon is white, 
hy ‘with | an even and flat conchoidal fracture, and firm; 
H.=3°5; G.=2°835. Adheres a ee’ to the tongue. A third 
C) is white, opaque, earthy; H.=18—2-0; G.=2°574. Ad- ws. 
heres strongly to the tongue. The first and third have — an- 
alyzed by Karafiat, the second by Hutzelmann, as follow 
by Al Ca Mg Fe Mn K&Na H 
A. 4950 2745 556 072 103 trace 1020 510= 99 
B, 2240 5640 trace O44 trace trace trace  21°13=100- * 
c 2353 53:00 O88 176 20 
Excluding the magnesia and reducing to a per-centage, B and 
Si #1 i t 
= 22°41 5645 a 14 } 
24°36 54°8 2076 ‘ 
The frst (A) is near agelanolite;, vier fora iB: a Be, 
K Sito Bi é ~¢ 
The otfier two are probably identical, tice to ‘thas the name eg 
Dilinite is applied. Haidinger deduces the formula 412 Si}4H= — Sak: 
Silica 24-97, alumina 55-56, water 19-47; and this he a 
may be resolved into Al Sip ort, the formula of Paani a 
kaolin, and A112, a hydrated alumina. [The formula Al? 
is still nearer C, giving silica 24-39, alumina 54: 23, water 21-38.] 1 
he diaspore of this locality has the specific gravity 3:340. og |* 
6. Bronentarpire, (M. A. Damour, Ann. des Mines, [4], xvi, + ~ 
227. )—Brongniardite i is an ore of antimony, lead and silver, from. oo 
the mines of Mexico, whee it was brought by M. de Castelnau. 
The specimen was a compact mass weighing about 153 AS om P 
and having one surface ‘Gpriniled with pyrites. The lowing * 2 ae 
are its characters :—Massive, without cleavage. . Lustre inaiatiic% ag ‘ 
resembling that of polybasite or bournonite. . Streak-powder sy... 
grayish-bla ck. Hardness above that of calcite, but scratched of 
a point of iron. ‘Specific gravity at 18° C., 5+ cc. #. 
-B. on en pp fuses —, at a.temperaturé, be- » 
low red heat,. 0 : 
