MINER ALOGV. 465 



Aicai'uite. — A kind of nickelifeioiis native iron Ibund in the drift of 

 the Gorge Eiver, wbicli empties into the Awarna, or Big Bay, on the west 

 coast of the middle island of Xew Zeahind. It is believed to have been 

 derived from a peiidotite, now altered largely into serpentine, and is 

 associated with gold, platinunj. cassiterite, chromite, magnetite. Its 

 hardness is about 5, and the speeific gravity 8.1. The composition is 

 expressed by the formula FeNi2, as shown by an analysis by W. Skey, 

 viz : 



Ni Fo Co S SiOi 



67.03 31. Oy 0.70 0.v!2 0.43=100 



This terrestrial uickeliferous iron is closely allied to the similar me- 

 teoric mineral which has been called octibbehite, found in Oktibbeha, 

 County, Mississippi. (Described by G. H. F. IXlrich in Araer. Journ. 

 Sci., 1887, XXXIII, 244.) 



Barkevildte, etc. — In a preliminary account of the results of an ex- 

 tended study of the minerals of the augite-syenite and elaeolite-syenite 

 veins of Southern Norway, W. C. Brogger has given brief accounts of 

 a number of new species. Full descriptions are promised later. The 

 names of these are, barkevikife, calciothoritc, melanocerite, nordenskioldine, 

 roseiibuschite. They are characterized briefly as follows: 



Barkevikite is a mineral belonging to the amphibole group, and most 

 closely related to arfvedsouite ; it is distinct, however, in optical char- 

 acters. 



Calciothoritc is a hydrous silicate of thorium and calcium, and it is 

 inferred, as seems very probable, that it is an alteration product of an 

 original thorium silicate (ThOjSiO)) ir,omorphous with zir(;on. Thorite, 

 orangite, eucrasite, freyalite, are other hydrous silicates that probably 

 have had a similar origin. 



Melanoceritc is a complex silicate of the cerium metals, yttrium and 

 calcium, with other substances in small amounts, including 3 i)er cent, 

 boron trioxide. It occurs in dark-brown crystals, belonging to the 

 rhombohedral -system, and tabular in hal)it. 



Nordenskioldine, luimed after the Swedish mineralogist and explorer, 

 A. E. Nordenskiold, is a mineral of remarkable composition, viz, a borate 

 of tin and calcium, CaO.Sn02.n2G:j. It has a sulphur-yellow color ; its 

 hardness is 5.5 to G, and its specific gravity 4.20. It appears in tabular 

 rhombohedral crystals. 



RosenhuscJdte, named after Professor Kosenbusch, of Heidelberg, is a 

 silicate of calcium and sodium with zirconium, titanium, and lanthanum 

 :n small amount. It belongs to the nionoclinic system and its crystals 

 are near wollastonite and pectolite in angle, and it is accordingly called 

 azirconium-pectolite. The color is orange-gray; the hardness is 5 to 6, 

 and the specific gravity 3..'J0. 



This account is given in the Geol. Forening Forhan<llingar (Stock- 

 holm), 1887, vol. IX, 247, and an abstract is given in Groth's Zeit- 

 H. Mis. 142 30 



