PHYSIOGRAPHY. 269 



White Antimony White Arsenic. 



support. It is soluble in nitro-muriatic acid. It is frequently produced 

 during chemical operations, and crystallized from sublimation. 



2. It consists of 



Antimony 84-32 



Oxygen 15-68 



3. It occurs in small quantities in veins, traversing primitive or grey- 

 wacke rocks, associated with ores of lead and antimony, with Blende, 

 Calcareous Spar and Quartz. 



4. Beautiful varieties of aggregated tabular crystals are found at 

 Przibram in Bohemia, and prisms of considerable thickness at Brauns- 

 dorf in Saxony. Other localitities are Malaczka in Hungary, Baden in 

 Nassau, and Allemont in Dauphiny. 



WHITE ARSENIC. Octahedral Arsenic-Acid. 

 MOHS. 



Primary form. Regular octahedron. 



Reniform, botryoidal, stalactitic, thin crusts. Massive : 

 pulverulent.. 



Color white, often inclining to yellow. Streak white. 

 Lustre vitreous, inclining to adamantine. Translucent . . . 

 opake. 



Sp. gr. = 3-69S. Taste sweetish astringent. 



1. If exposed to a high degree of temperature, it is entirely volatil- 

 ized ; upon ignited charcoiil, it emits a strong garlick smell. Its while 

 smoke condenses itself again upon cold bodies. It is .soluble in water, 



2. Analysis. 

 By BERZEL.IUS. 



Arsenic 75-82 



Oxygen . \ 24-18 



3. It is found in metalliferous veins, where it probably owes its exist- 

 ence to the decomposition of other minerals. It has been found at An- 

 dreasberg in the Hartz, at Joachimsthal in Bohemia, and at Bieber in 

 the principality of Hanau, &c. 



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