182 Scientific Intelligence. 



Rutherford. It occurs as an alteration-product forming a crust 

 over masses of pitchblende (U 3 8 87'7 p. c, sp. grav. — 8"84). 

 It has a yellow color and specific gravity of 4*82 ; it is highly 

 radio-active. An analysis gave : 



U0 3 C0 2 PbO FeO CaO H 2 Gangue 



83-8 12-1 1-0 0-8 1-1 0-7 .0-8=100-3 



For this the composition UO„.CO„ is calculated. — Centralbl. Min., 

 p. 761, 1906. 



Hkllandite is a silicate of complex composition containing 

 yttrium and erbium with aluminium and calcium chiefly ; it is 

 described by W. C. Brogger from the pegmatite veins in the 

 neighborhood of Kragero, Southern Norway. It occurs in pris- 

 matic crystals referred to the monoclinic system. The material 

 was more or less altered ; the freshest had a nut-brown color 

 with hardness = 5 - 5 and sp. gravity = 3-70; more altered crys- 

 tals had a brownish red color with the sp. gravity ranging from 

 3-55 to 3-33. An analysis of somewhat altered crystals by L. 

 Andersen-Aars gave : 



Si0 2 A1 2 3 Fe 2 3 Mn,0 3 Ce 2 3 Y 2 3 Er a 3 Th0 2 CaO MgO Na 2 K 2 

 23-66 1012 2-56 5-91 l'Ol 19-29 15-43 0-62 9-81 0-10 0"23 0-06 



H 2 11-75 = 100-55 



A relation in form and composition to guarinite is suggested, as 

 also to dauburite and topaz. — Zeitschr. Kryst., xlii, 417. 



Podolite is described by W. Tschirwinsky as a phosphate 

 and carbonate of calcium having the composition 3Ca s P 2 8 . 

 CaC0 3 , analogous to apatite. It occurs in the phosphorite of 

 ■Government Podolia in South Russia. Minute prismatic hex- 

 agonal crystals, yellow in color, are noted ; also small spherulitic 

 forms with fibrous structure. Only a minute quantity of the 

 crystals was available for analysis ; from this the approximate 

 results obtained were : 



P 2 5 39-04 CaO 51-15 Fe 2 3 3-04 C0 2 3-90 = 9714 



The evolution of C0 2 was obtained from perfectly clear and 

 homogeneous crystals, free from calcite, when treated with 

 hydrochloric acid. The name carbapatite earlier suggested for 

 this mineral by P. Tschirwinsky is now withdrawn by him. — 

 Centralbl Min., No. 9, 1907, p. 279. 



Nepouite is a hydrated silicate of nickel and magnesium 

 described by E. Glasser from New Caledonia. It is related to 

 the similar compounds called garnierite and noumeite, but occurs 

 in minute hexagonal scales often grouped in vermicular forms 

 analogous to the chlorites. Analyses lead to the formula 

 3(Ni,Mg)O.SiO„.2H 2 0, but show a wide variation in the relative 

 amounts of nickel and magnesia, from NiO 50*7 and MgO 3"00 to 

 NiO 18-21 and MgO 29*84. — Bull. Soc. Frang. Min., xxx, 17, 

 1907. 



Goeceixite and Harttite are phosphates identified by E. 

 Hussak among the "favas" of the diamond-bearing sands of 



