642 MINERALOGY 



. Not completely soluble in water. 



a. Alone yields an azure-blue flame. 



Spangolite, (A1.C1)SO 4 .6 Cu(OH) 2 .3 H 2 ; Dark green ; 



Cl. basal; H. 2-3 ; G. 3.14; F. 3 ; III. 

 Connellite, Cui 5 (Cl.OH) 4 SO 16 .15 H 2 O ; Blue; H. 3; 



G. 3.36 ; F. 2.5 ; III. Prismatic. 



b. Do not yield an azure-blue flame. 

 BROCHANTITE, Cu 4 (OH) 6 SO 4 ; Deep emerald-green; 



H. 3.5-4; G. 3.9; F. 3.5 ; IV; p. 541. 

 Stelznerite, CuSO 4 .2Cu(OH) 2 ; Green; G. 3.88 ; IV. 

 Langite, CuSO 4 .3 Cu(OH) 2 .H 2 O ; Blue, greenish blue; 



H. 2.5-3; G. 3.50; F. 3.5; IV. 



Herrengrundite, 2(Cu.OH) 2 SO 4 .Cu(OH) 2 .3 H 2 ; Em- 

 erald-green; H. 2.5; G. 3.1; F. 3.5. ; V. 

 Cyanotrichite, Cu 4 Al 2 S0 10 .8 H 2 O ; Clear blue ; Pearly ; 



G. 2.7; F. 3; IV. 

 Lindackerite, (Cu.OH) 4 Cu 2 Ni 3 (SO 4 )(AsO 4 ) 4 .5 H 2 0; 



Verdigris- to apple-green ; H. 2-2.5 ; G. 2.25 ; F. 2-3 ; 



IV. 

 Dolerophanite, (Cu 2 O)SO 4 ; Brown ; F. 3 ; V ; Yields 



little or no water. 



c. With von Kobell's flux shows lead. 



Arzrunite, PbS0 4 .PbO, 3CuCl 2 Cu(OH) 2 .H 2 ; Blue ; F. 



2; IV. 

 Linarite, [(Pb.Cu)OH] 2 SO 4 ; Azure-blue; Cl. pina- 



coidal; H. 2.5; G. 5.45; F. 1.5; V. 

 Caledonite, [(Pb.Cu)OH] 2 SO 4 ; Bluish green; Cl. 



basal; H. 2.5-3; G. 6.40; F. 1.5; IV. 



3. The powdered mineral heated in the closed tube with a few 

 small fragments of coal yields an arsenic mirror; 

 b, p. 585. 

 a. The powdered mineral in R. F. becomes magnetic. 



Chenevixite, Cu 2 (Fe.O) 2 (AsO 4 ) 2 .3 H 2 O ; Dark to olive- 

 green ; Dull ; H. 4.5 ; G. 3.94 ; F. 2.5 ; Massive. 

 6. With soda and borax in R. F. on coal yields a zinc oxide 



coat. 

 Veszelyite, 7 (Cu.Zn)O.(As.P) 2 O 5 .9 H 2 O ; Greenish blue ; 



H. 3.5-4; G. 3.79; VI. 



c. With von Kobell's flux shows bismuth ; b, p. 580. 

 Mixite, Cu 2 (Cu.OH) 8 Bi(AsO 4 ) 5 .7H 2 O; Pale green; H. 

 3-4 ; G. 3.8 ; F. 2 ; Capillary. 



