Comlrinations of different Metals and Chlorine, C^c. 85 



than one combination of these difierent metals and chlorine, 

 but without success. 



I have jjrocured a compound of manganese and chlorine, 

 by evaporating to dr\ness the white muriat of iliis metal, 

 and heating to redness the residue in a glass tube, having 

 only a very small orifice. Muriatic acid vapour was pro- 

 <luced, and a fixed compound remained, which required a 

 red heat for its fusion, and was not altered by the st'-ongest 

 heat that could be eiven to it in the glass tui)e ; but was 

 rapidly decomposed \\ hep heated in an open vessel, muriatic 

 acid fumes bemg evolved, and oxide of manganese formed, 

 which was black or red, according to the intensity of the 

 heat applied. The compound of man^ianese and chlorine 

 is a very beautiful substance, it is of great brtlliancv, ge- 

 nerally of a pure delicate light pink cohiur, and of a lamellar 

 texture consistmg of broad thin plates. 



There is not much d.fficidtv in obtaining this compound 

 pure. Iron, wiih which manganese is commonly con- 

 taminated, may be sep;iraied by two or three repetitions of 

 the solution of the conipound in water, the evaporation to 

 dryness of the clear filtered muriat, and fusiojj of the re- 

 sidue procured by evaporation. Indeed, I think this a 

 good general method for purifying manganese from iron. 

 One of the combinations of the latter nieta! and chlorine 

 being volatile, heat must separate it from the compound of 

 manganese. And I have thus oDtained it so free from iron, 

 that triple prussiat of potash added to its solution in water 

 ■gave merely a white precipitate without the slightest tint of 

 bjiie. 



This compound deliquesces when exposed to the atmo- 

 sphere, and IS converted into the white muriat. Like ter- 

 rane, it affords a trifling residue when heated with water. 

 The residue is oxide of iiiani;anese, white at first, but soon 

 becoming red, and even black ; it varies in qiantiiy, ac- 

 cording to the exclusion of air in the formation of the 

 combination. 



Kitty grains of the compound dissolved in water, with 

 the exception of one gram; this residue was separated by 

 decaniation of the fluid, washed, dried, and htaled to red- 

 ness, it was in the state of black oxide. '1 he colourless 

 solution was precipitaied by nitrat of silver. The horn 

 filverf unied, wiun dried, -Aas ct|ual to lOS irrains. Hence, 

 omitting the one gram of mixed oxid-J, lUO of this coni- 

 pounil appear to consist of 



34 clilorine 

 46 manganese 

 loo" The 



