ANALYSIS OT B1V.0NZITE. SSl 



XI. 



Analjjsis of tke Bronzite. By Mr, Klaproth*. 



A 



VERY remarkable fossil, found in large masses in the Bronzite. 

 strata of serpentine near Kranbat in Upper Stiria, has been 

 known within these few years by the name of bronzite. 

 The following are its characters, as given by Mr. G, R. 

 Ears ten. 



Its colour is a light iombac brown, *ts characters. 



It is in masses, disseminated in large pieces. 



It has a metallic semibrilliancy. 



Its fracture is lamellar, very distinct from simple splitting. 



The pieces separated are large grained. 



In thin plates, it is translucid : in the mass, opaque. 



Where scraped it appears white. 



It is semihard, and very brittle. 



Its specific gravity is not great. That of the specimen 

 analysed was 3-2. 



A. Exposed to a red heat for half an hour its colour Analysed, 

 was rendered a little lighter, and it lost half a part per 



cent. 



B. a. 100 grains of bronzite were thickened with a lix- 

 ivium containing 200 grains of potash, and then kept at a 

 red heat for half an hour. The mass, which had not en- 

 tered into fusion, was triturated in a mortar, then softened 

 with hot water, supersaturated with muriatic acid, and com- 

 pletely dissolved. Being evaporated to dryness, and then 

 treateii \y\th. water acidulated with muriatic acid, the silexSilex. 

 remained, which, after calcination, weighed 60 grains. 



b. The muriatic solution was neutralized cold with car- 

 bonate of soda- The precipitate, treated with a boiling 

 lixivium of potash imparted nothing to it. Weil washed 



and heated red hot, 10*5 grs. of oxide of iron remained. Oxide of iron. 



c. The colourless liquid, thus divested of iron, was 

 made to boil, after which a sufficient quantity of carbonate 

 •of soda was added to decompose it entirely. The preci- 



* Annales de Cbim. vol, LXV, p. 107. Translated from Geh- 

 len's Journal. 



pitate 



