MELLILITE. 125 



MASCAGNINE OE SULPHAT OF AMMONIAC. 



SALT. 



Mascagnine or Sulphat of Ammoniac. JAM. Syst. VoL 

 III. p. 16. Man. p. 13. 



Prismatic, according to MITSCHERLICH. Stalacti- 

 tic : composition impalpable. Mealy efflorescence. 



Colour yellowish-grey, lemon-yellow. Semi-trans- 

 parent ...opake. 



Taste pungent, bitter. 



It is soluble in double its weight of water. It attracts 

 moisture from the atmosphere, and is entirely volatile in 

 a higher temperature. It consists of 



Sulphuric Acid 53-29. 



Ammonia 22-80. 



Water 23-91., 



and its formula is N H s"+ 2 Aq, according to BEHZE- 

 LIUS. It occurs in the neighbourhood of Vesuvius and 

 Etna, in the Solfatara near Puzzuolo, and in the Lagunes 

 near Siena in Tuscany. 



MELLILITE. 

 Mellilite. JAM. Man. p. 325. Mellilite. PHILL. p. 208. 



Prismatic. P + oo = 115. r =: 70 (nearly). 

 HAUY. According to PHILLIPS, they are square 

 prisms, having the lateral edges replaced. 



Colour yellow, inclining to red or green. Opake. 



Gives sparks with steeL 



Before the blowpipe it melts without ebullition into a 

 greenish glass. Reduced to powder, it gelatinises with 

 nitric acid. According to CARPI, it consists of 



Silica 38H)0. 



Lime 19-60. 



