KcHAf.LER.] 



Minerals from Leona Heights. 



213 



I = oo2 = J 120 } . This new prism was observed but once, as 

 an extremely narrow face, giving, however, a fairly good 

 reflection. 



g = 14 = \ 141 \ . This new pyramid was observed on only one 

 crystal, though both faces of the form are present, one 

 face giving a good reflection and the other face a poor one. 

 The form lies in the /one .1/ w. 



The crystals show two habits. In one the form p — JlOlj 

 is very large, and the crystals are tabular parallel to this 

 form and sometimes extremely thin. In the second habit the 

 prism zone is well developed, and the faces elongated somewhat 

 in the direction of the vertical axis, giving a prismatic habit 

 to the crystals. Other forms are abundant on crystals of 

 this latter habit, notably the domes, p = {l0l\, q = )021j and 

 ir = j031i. Figs. 10, 11, Plate 1!), show the two habits. 



The combinations occurring are given in the following table: 



No c 6 a m I M h v q w p s z g 



1 a m — M — — p — — — 



2 — b a vi — M q — p 



3 — b a m — M h — q w p — s g 



4 — — a m — M — — q w p — 



5 c b a id — M h — — — j) s — — 



6 cbamlMhvq w p s 



7 — b am — M h — q — p — z — 



The following table gives a calculation of the two new forms, 

 / = jl20| and g = {ill}: 



u 

 & 

 



3 



Letter. 





Miller. 





P 



fo 







V 



x' 



(Prism) 

 (x : y) 



it' 



d' 

 = tgp 



1 



2 



1 



g 



oo2 

 14 



120 

 141 



■J7° 14' 

 140 45 



90° 00' 

 (54 23 



90 no' 

 52 50 



90° 00' 

 14 



37° 14' 

 34 47 



52° 46' 

 44 17 



0.7601 

 1.3193 



CO 



T.6147 



CO 



2.0851 



Chemical Properties. — All of the analyses showed merely a 

 trace of magnesia, and no iron. The crystals represent, there- 

 fore, a rather pure copper sulphate. The average of the analyses 

 gave: 



