ANKERITE FROM SANDHURST, VICTORIA — CO0K8EY. 6.5 



and this again : — 



(CaFeC,Oe) + f (CaMgC^Oe) 



in which it is seen that n is equal to f. This mineral therefore, 

 according to Boricky's nomenclature, must be placed with the 

 ankerites, but differs from the normal however in that n is f in- 

 stead of 1. 



In Australia generally this mineral has been rarely observed. 

 In New South Wales, Queensland, and Tasmania it has not been 

 recorded. In Victoria, A. R. C. Selwyn and G. H. F. Ulrich* state 

 that a mineral similar in composition was met with in veins and 

 patches in decomposed basalt at Philiplsland ; and in South Australia 

 it has been found at Gill'sBlufF, near Lyndhurst, and at theWalleroo 

 Mine. Brown spar and ferroealcite have been observed in several 

 places, but they vary very considerably in composition from anker- 

 ite itself. 



* A. R C. Selwyn and G. H. F. Ulrich— Phys. Geogr., Qeol. and Min. 

 Vict., 1866, p. 75. 



