ABSTRACTS 



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GEOLOGY. — Carnotite near Mauch Chunk, Pennsylvania. Edgar 



T. Wherry. U. S. Geological Survey Bulletin 580-F. Pp. 147- 



151. 1914. 



The location, history, geology, composition, origin, and commercial 



value of the deposit are briefly discussed. The results of a new 



analysis are given, the potassium being much higher than the calcium 



and the usual carnotite ratio of V: U = 1:1 being shown. 



E. T. W. 

 MINERALOGY. — Notes on wolframite, heraunite, and axinite. Edgar 

 T. Wherry. Proceedings of the U. S. National Museum, 47: 501. 

 1914. 

 Analyses of two specimens of wolframite and the calculated mineral 

 compositions are given. The convenience of chemical prefixes for 

 the end members of isomorphous series is illustrated by the adoption 

 of the following nomenclature: Ferrowolframite, FeW04; manganowolf- 

 ramite, MnW^04; calcioscheelite, CaW04; magnesioscheelite, MgW04; 

 cuproscheelite, CUWO4; ferrotantalite, Fe(Ta03)2; manganotantalite, 

 Mn(Ta03)2; ferrocolumbite, Fe(Cb03)2; and manganocolumbite, 

 Mn(Cb03)2. 



A ferric phosphate from Hellertown, Pennsylvania, showed wide 

 variations in composition, although it agreed in physical features with 

 beraunite. The variations may be explained by considering the 

 material a meta-colloid : In the original colloid condition it was an 

 adsorption compound of the constituent oxides and water; but, when 

 it attained its present form, the adsorbed constituents united as well 

 as they could into definite compounds, which formed mix-crystals. 



A supposed new mineral from Avondale, Pennsylvania, proved to be 

 axinite containing intergrown zoisite. 



E. T. W. 

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