650 MINERALOGY 



CALAMINE, (Zn.OH) 2 Si0 3 ; White, yellow, blue; H. 



4.5-5; G. 3.45; IV; p. 472. 

 Clinohedrite, H 2 CaZnSiO 5 ; Amethystine to white; H. 



5-6 ; G. 3.33 ; F. 4 ; IV. 

 Leucophoenicite, (Mn.Ca.Zn) 5 (Mn.Ca.ZnOH) 2 (Si0 4 )3 ; 



Purple-red ; H. 5.5-6 ; G. 3.84 ; F. 3 ; V. 

 4. Not included above, 

 a. Easily soluble in HC1. 



ZINCITE, ZnO: Deep red to orange-yellow; Cl 



basal; H. 4-4.5; G. 5.55; Inf.; Ill; p. 339. , 

 6. The nitric acid solution shows phosphoric acid with 



ammonium molybdate. 

 Hopeite, Zn 3 (PO 4 ) 2 .4 H 2 ; Grayish white ; Cl. pina- 



coidal; H. 2.5-3; G. 2.76; F. 3; IV. 

 c. Not easily soluble in HC1. 



GAHNITE, ZnAl 2 O 4 ; Dark green; H. 7.5-8; G. 4.55; 



Inf. ; I ; p. 377. 



JEFFERSONITE, (Ca.Mn)(Mg.Fe.Zn)(SiO 3 ) 2 ; Green- 

 ish black to brown; Cl. prismatic; H. 5-6; G. 

 3.6 ; F. 4 ; V ; p. 424. 

 Disluite, (Zn.Fe.Mn.Mg)(Al.Fe)0 ; Green-black, green, 



gray; H. 7.5-8; G. 4.5; Inf.; I. 

 B. With Von Kobell's flux shows bismuth ; p. 580. 



1. The powdered mineral when heated in the closed tube with 



a few fragments of coal yields an arsenic mirror, 



p. 585. 

 a. The S. Ph. bead in R. F. is green (uranium). 



Walpurgite, Bi, .(UO 2 ) 3 (OH) 24 (As0 4 ) 4 ; Wax-yellow; Cl. 



pinacoidal; H. 3.5; G. 5.76; F. 1.5; VI. 

 6. The S. Ph is not green, or shows no uranium. 



Atelestite, (Bi.2 OH)(BiO) 2 AsO 4 ; Sulphur-yellow; H. 



3-4; G. 6.40; F. 1.5; V. 

 Rhagite, 3 Bi(OH) 3 .2 BiAs0 4 ; Yellow to greenish; 



Resinous; H. 5; G. 6.80; F. 1.5; Mammillary. 



2. Effervesces with warm dilute HC1 (carbonates). 

 a. Yields little or no water. 



Bismuthosphserite, (Bi.O) 2 CO 3 ; White to gray ; Dull ; 



H. 3-3.5; G. 7.42; F. 1.5; Massive. 

 6. Yields water. 



Bismutite, (BiO)(Bi.2 OH)CO 3 ; Yellowish to grayish; 



Dull; H. 4-4.5; G. 6.88. 



