G2 



NOTES ON SOME EECENTLY DISCOVERED AND 



OTHER MINERALS OCCURRING IN TASMANIA. 



By W. F. Petterd. 



Bead November 15, 1897. 



1. Aihenite (Sulphatiobismuthite of lead and copper). 



Occurs in small acicular crystals which are longitudinally 

 lined, also massive. It is commonly tarnished copper tints. 

 Rare in siderite with bismuthinite. Block 291, North-East 

 Dundas. 



2. Analcite (Hydrated silicate of aluminium and sodium). 



Small crystals are somewhat abundant in vesicular basalt 

 at the Penguin River. 



3. Bismuthinite (Sulphide of bismuth). 



Common in acicular crystals associated with tetrahedrite 

 from the Curtin-Davis group of mines, North-East Dundas. 

 The tetrahedrite also contains bismuth, which possibly re- 

 places portion of the antimony of that mineral. The 

 associated minerals are mainly chalcopyrite and siderite. At 

 the East Hercules Mine it occurs in chloritic schist with 

 pyrite and chalcopyrite. At the South Mount Black P.A. it 

 has been obtained from tourmaline and quartz in schist 

 rock. 



4. Boulangerite (?) (Sulphantimonite of lead). 



A mineral resembling this, but of which no quantitative 

 analysis has been made, comes from Block 291 mine, North- 

 East Dundas. It is evidently a sulphantimonite of lead, 

 with bismuth, iron, and copper, the first-mentioned constituent 

 giving strong reactions. It is largely mixed with chalcopyrite, 

 arsenopyrite, and pyrite, and is rich in silver. (R. H. 

 Walcott). 



5. Chalcotrichite (Fibrous cuprite). 



Found by Mr. R. Williams at the Colebrook Mine. It 

 occurred in capillary tufts, of a beautiful crimson cclour, 

 surrounded by a thin coating of native copper in the liniurite 

 rock. 



