70 



CHEMISTRY. 



nnS^'^^^' ^ H^^ te^^Perature it burns in the open air, the vanour 

 condensing HI white crystals of the sesquioxide/(~^^, Z,"^^ 



^I"?.^: (Stibium) Sb.-Eq. 129. It forms three compounds with 



oxygen 



&ss.«.«,«f« Sbp3,-prepared by burning antimony in the open 

 an alkaline carbonate, or by the action of carbonate of notassa 

 W n T ""' ^t'''r'"°"'^'^' "•"=" P"' i"'° -«ter. It I a pale veT 



inTiCtr^Tii:'"'^-''^"^ '° ^^^^^'^ °-^^^-'-"^« "-^ '"■^■"he 



X«&mo«jo«s aaW, Sb,0,,_made by heating the oxide in onen 

 J±7tumomc acid, Sbp„— made by action of strong nitric acid in 



ro"rni.-r -r'^ ''--'--' ^-^-^ unitj rtSi 



anttlvlnThf' ■^'''^'»' (*^'«-/ «-'«-<'«y.)-made by burning 

 when nut intnwT Sf j, '^ ^,f .-^"M <*' common temperatures! 

 eenerJed 'nH .b?','"; ''y'''-';'^^''",™. ^eid and the sesqui'oxide are 

 geneiated, and the latter combmed with some undecomposed chloride 



:^^r%V'^''"'f'''rfV ^"^^'-^ --^ one' or two o he; 

 tant is th;";^, "■' ^^"Tf '"'P''"'-'i'^ oC which the most impor- 

 Ind fu lie rf '^^?«««^i*"-^^- it is a lead-gray substance, brittle 



together """^ "^'^^ ^^ ■"""'"§ ^"'P"^"' ^"'i ^°'™°»y 



SomTlTrl^r'-T^'"^"'^ ^y ''"'""S ^e^quisulphuretof anti. 

 tTon^enLes h K k'''"''''??''^'''^'' ^ P"*'^' double decomposi- 



of antimlv t/f ' ""T '«"^'' ""'"^^ ^i* undecomposed sulphuret 

 monv kthe ^ T™ ^'"'Ph"-^^l'- i" ^hich the sulphuret of' anti- 

 mony ,s the acid, and sulphuret of potassium the base. As the 



nhuet"of° r *" ''"f!^-'^'^ ''^~"'^' decomposed, the sesquisuU 

 phuret of antimony subsiding along with a variable portion of potassa 

 and oxide of antuTiony. This is the kermes, which may hence be 



some tffhe'rh" Tr'^'l"'- ''''' '"°">- ^^'^^ ^'"' "nta^ 

 some of the above sulphur-salt, together with potassa and oxide of 



andTs"^-' Ti'T "•" ^''*"°" "'■ ^"'P*-"™ acid, the sesquioxide 



this rtrx:.:^.^r""' '^="^'^^^' ^"' -'"^°"' "^^ p°'-- = 



The most important salt of antimony is tartar emetic ;—mB.ie by 

 bo, ng cream of tartar with the sesquioxide of antimony. iHs a 

 white, crystalline, soluble salt, which gives a brick-red predpitate (the 



atT'^uKhT' k",'" '"'p'k"""^" '^'''™§^"' " also 'yields p>Li;r 

 tates with the alkalies, earths, tannic acid, &c. ■' i- f 



