schaller: gem tourmalines 



145 



Mean refractive index about 1.66, double refraction low. In 

 thin section yellow and non-pleochroic. Formula Fe 2 3 .9MnO. 

 4P 2 5 .14H 2 0, (Analysis 2). 



Sicklerite. Named after the Sickler family, formerly of Pala. 

 Found in cleavable masses at the Vanderburg-Naylor Mine on 

 Hiriart Hill near Pala. Dark brown color with a light yellow- 

 brown streak. D. 3.45. Refractive indices about 1.74, double 

 refraction moderate. Pleochroic in yellow and brown. For- 

 mula Fe 2 3 .6Mn0.4P 2 5 .3(Li,H) 2 0, (Analysis 3). Readily fusible 

 before the blowpipe giving a lithium flame. Results from the 

 alteration of lithiophilite. 



In addition to the above named new minerals, there occur at 

 Pala, associated with them, the following whose properties and 

 relations to one another will be given in detail in the full report : 

 lithiophilite, hureaulite, strengite (the same as the angelardite of 

 Lacroix, 3 ) triplite, purpurite, 4 manganite and psilomelane. 



Analyses and Ratios of New Minerals 



FeO 



MnO 



CaO 



Fe 2 3 



Mn 2 3 .... 



P 2 5 



H 2 O(110°) 

 H 2 0+. . 



Li 2 



Insoluble. 



PALAITE 



Analysis 



7.48 



40.87 



1.77 



0.16 



39.02 



10.43 



trace 

 0.89 



100.62 



Ratios 



5.00 



1.93 

 4.07 



SALMONSITE 



Analysis 



0.13 

 37.74 

 1.06. 

 9.53 



34.86 



0.43 



15.30 



1.40 



100.45 



Ratios 



9.18 



1.00 



4.10 



14.17 



SICKLEBITE 



Analysis 



33.60 

 0.20 



11.26 

 2.10 



43.10 



1.71\ 

 3.80/ 

 4.18 



99.95 



Ratios 



6.28 



1.09 

 4.00 



2.92 



3 Loc. cit., p. 522. 



4 Compare this Journal, 1: 113. 



1911. 



