L62 On Tribasic Phosphoric Acid. 



phate in the year 1 v l v . We have to except, however, the Trip- 

 lite, a mineral that was analyzed in L802, by Vanquelin. 



1801 1846. Pseudomalachite, Karsten (Klaprolh N. Schrift. 

 ( . - Nat Preuude iii. 304 i. 



Bermann (J. pr. < !h. X X X VII.). 



Mai \ minerals existed of this constitution which had been 

 analyzed before Hermann. Be was, however, the first to 

 analyze them all and classify them. Be heats to red heat, and 

 counting the loss as water, fuses with caustic soda. The residue 

 after washing i> oxyd of copper. Aiter testing the wash- 

 water for AJj 8 and Mn<). in their absence he calls the »lit'- 

 ference phosphoric acid. 



1. Tromboliihe y CuO 3, PO' 2+6HO, was first analyzed by 



■ r. 



II. PO B = tl.00. 

 CuO=39.20. 

 HO L6.80. 



2. Libethenite, CuO t, PO HO. 



.o I. PO HO) • (CuO I. PO 8 ■ 2 HO). 

 Cu( u. PO • •_' IK) 

 ie mentioned 1 v 1l' 1>\ Leonhardl (Leonhardl and Sclby'a 

 Mineral. Stud.). Kuhn analyzed it in L 844, also Berthier and 

 I [ermann. 



K. P( » 29.4 I 

 CuO 66.94 

 BO kOl 



B. I'« »' 28.70 



CuO 63.90 



HO T.i" 



II. PO 26.61 



CuO I 



IK» 5.50 



, . .7,7/,.. Cu< » i. PO"+3 HO, analyzed first by Hermann 



