On Tvibasio Phosphoric Acid. 103 



PO 5 =20.44 



CuO=61.29 



HO=10.77 



1.50 Fe 2 O s 

 4. Dihydrite, CuO 5, P0 3 + 2 HO, lias been analyzed by 

 ArfVedson under the Dame of Phosphor-Kupfererz. Hermann 

 made the first analysis. 



H. PO 5 =25.30 

 OuO=68.21 

 HO = 6.49 



Afvs. P0 5 =24.7<» 

 CuO=68.20 

 H0 = 5.97 

 5. Phosphoro calcite (CuO 5, P0 5 + 2 HO) + (CuO 5, P0 5 +3 

 HO) occurs principally in Taigilsk, also (a) in Rheinbreiten- 

 bach ; it has been analyzed by Klaproth, Kuhn, Lynn and Her- 

 mann. 



(a) 



H. P0 5 =23.75— 23.47— 24.55 

 CuO = 68.75— 07.73— 67.25 

 HO= 7.50— 8.80— 8.20 



Kip. P0 5 = 

 CuO=68.13 



HO= — 



K. P0 5 =21.52 

 Cu0=68.74 

 HO= 8.62 



L. P0 5 =21.69 

 CuO :62.85 

 BO=15.45 



6. Ehlite, CuO 5, P0 5 + 3 HO, has been analyzed by Berg 

 mann. 



