644 MINERALOGY 



to dark green; Cl. basal; H. 2.5 ; G. 3.1; F. 4-4.5; 

 VI. 

 6. With von Kobell's flux shows lead, p. 579. 



Vauquelinite, (Pb.Cu) 3 (P.O 4 ) 2 .2 (Pb.Cu)Cr0 4 ; Green, 

 brown; Resinous; H. 2.5-3; G. 5.95; F. 2?; V. 



c. In S. Ph. shows uranium; a, p. 576. 

 TORBERNITE, Cu(UO 2 )2(PO 4 ) 2 .8 H 2 O ; Emerald- to 



apple-green ; Cl. basal ; H. 2-2.5 ; G. 3.50 ; F. 3 ; 

 II; p. 519. 



d. Phosphates of copper only. 



LIBETHENITE, Cu(Cu.OH)P0 4 ; Dark to olive-green; 

 H. 4; G. 3.70; F. 2.5; IV; p. 513. 



PSEUDOMALACHITE, (Cu.OH) 3 P0 4 ; Dark to emer- 

 ald-green ; H. 4.5-5 ; G. 4-4.4 ; Massive. 



Dihydrite, Cu(Cu.OH) 4 (PO 4 ) 2 ; Dark emerald-green; 

 H. 4.5-5; G. 4.20; F. 2.5; VorVI?. 



Tagilite, Cu((5u.OH)PO 4 .H 2 O; Emerald-green; H. 

 3-4; G. 4.07; F. 2.5 ; V; Fibrous. 



5. Alone yields an azure-blue flame. 



+ . With von Kobell's flux shows no lead. 



ATACAMITE, Cu 2 Cl(OH) 3 ; Deep emerald-green; H. 

 3-3.5 ; G. 3.75 ; F. 3-4 ; IV ; p. 334. 



Footeite, 8 Cu(OH) 2 .CuCl 2 .4 H 2 O ; Deep blue ; V. 



Nantokite, CuCl ; White; Adamantine; H. 2-2.5; 

 G. 3.93; F.I. 5; I. Yields no water. 



. With von Kobell's flux shows lead. 



Percylite, PbCuCl 2 (OH) 2 ; Indigo-blue; Brilliant; Cl. 

 cubic; H. 3; G. 5.08; F. 1; I. 



Cumengite, PbCuCl 2 (OH) 2 ; Indigo-blue; Cl. pyrami- 

 dal ; H. 3 ; G. 4.71 ; F. 1 ; II. 



6. Decomposed with HC1, leaving a residue of silica ; d, p. 592. 



CHRYSOCOLLA, CuSiO 3 .2 H 2 ; Green to turquoise- 

 blue ; H. 2-4 ; G. 2.12 ; F. Difficult ; Massive, p. 503. 



DIOPTASE, H 2 CuSiO 4 ; Emerald-green; Cl. rhombo- 

 hedral ; H. 5 ; G. 3.35 ; F. Difficult ; III ; p. 452. 



7. Not included above. 



CtTPRITE, Cu 2 O ; Ruby-red ; Adamantine ; H. 3.5-4 ; 



G. 6.00 ; F. 3 ; I ; p. 337. 

 a. Fused with soda it yields a sulphur reaction. 



COVELLITE, CuS ; Indigo-blue; Cl. basal ; H. 1.5-2; 



G. 4.6; F. 2.5; III; p. 306. 



