CATALOGUE OF MINERALS. 



Same. 



Formula. 



System of 

 crystallization. 



D. OXYGEN COMPOUNDS. 



I. BINARY COMPOUNDS. 



1. Oxides of the Elements of the Hydrogen Group. 



A. ANHYDROUS OXIDES. 



1. Monometric. 



Mg 1 



143. Periclase 



144. Red Copper * 



145. Martite* 



146. Iserine 



147. Irite? 

 143. Spinel * 



149. Magnetite* 



150. Magnoferrite 



151. Franklinite* 



152. Chromic Iron * 



153. Pitchblende 



154. Melaconite * 



155. Plumbic Ochre * 



Fe 



Fe (e, Ti) 



(ir,6s,Fe) (Ir,Os,Cr) 2 3 ? 



* Mg XI 



Fee 



t Mg 3 SV 



(Fe, 2n) 3 (3?e, Mn) 



(Fe,Mg)(l,r) 



2. Hexagonal. 

 S 



1 

 1 

 1 

 1 

 1 

 1? 



156. &quot;Water * H 6 



157. Zincite * n 6 



158. Corundum* &1 6 



159. Hematite* 3Pe 6 



160. Ilmenite * i, 1Pe, 6 



161. Plattnerite JPb 6? 



162. Tenorite u 6? 



* Mg may be replaced by Ca, Fe, Mn, or 2u, alone or in combination. 



f Rammelsberg gives the formula Mg m Pe a , and gives 3 and 4 as the probable 

 values of m and n. 



