2/2 OXIDE OF URANIUM. 



Oxide of Uranium. See Pitchblende. 



Oxide of Zinc. See Zincite. 



Oxide Rouge de Titanium, La Metherie. 

 See Rutile. 



Oxychlokide of Copper. See Ataca- 



MITE. 



OxYCHLORiDE OF Lead. See Mendipite 

 and Matlockite. 



OxYDE ZiNCiQUE. See Zincite. 



OxyduIjAted Copper. See Red Copper. 



OxYDULATED Iron, Phillips. See Mag- 

 netite. 



Oxysulphide of Zinc. See Voltzite. 



Ozarkite. An amorphous or fibrous- 

 radiated form of Thorasonite. It occurs as- 

 sociated with Elseolite and Apatite at the 

 Ozark mountains, Arkansas. 



Ozocerite, or Ozokerite, Glocker, Phil- 

 lips, Dufrenoy. A mineral resin, resembling 

 a resinous wax in consistence and trans- 

 lucence. Amorphous, sometimes fibrous or 

 foliated. Colour yeliowish-brown by trans- 

 mitted light, dark leek-green by reflected 

 light. Lustre glimmermg, glistening on 

 principal fracture. Subtranslucent. Has 

 an agreeable aromatic odour. Softens by 

 the heat of the hand, and may be kneaded 

 like wax. Structure sometimes foliated. 

 Fracture flat-conchoidal in one direction, in 

 another splintery : can be reduced to powder 

 in a mortar. S.G. 0-955. 



Comp. CH, or carbon 86, hydrogen 14 

 = 100. 



Fuses at 140° F., and boils at from 121° to 

 210° C. (249-8° to 410° F.), distilling to a 

 clear oily fluid, which becomes solid on 

 cooling. Burns with a bright clear flame, 

 ■without leaving an}^ residue. 



Forms a yellow solution readily in oil of 

 turpentine; with difficulty in ether or 

 alcohol. 



Not acted on by acids. 



Localities. — British. Urpeth Colliery, near 

 Newcastle-on-Tyne ; Uphal, Linlithgow- 

 shire. — Foreiqn. Moldavia ; at Slanik and 

 Zietrisika, in sandstone, in sufficient quan- 

 tity to be used for economical purposes ; in 

 Austria, at Truskawiezi, in Galicia, and 

 Gresten, near Garning. Wet tin in Prussia. 



Name. From o'C'-'v, to smell, and ^^'ri^o?, wax. 

 M.P.G. Horse-shoe Case, Nos. 95 to 97. 



Magnus, Schrotter, and Malaguti agree 

 in representing Ozocerite as a mixture of 

 several substances, differing in their physical 

 properties, yet possessing the same ultimate 

 chemical constitution. 



PALAGONITE. 



Paco, or Pacos. The Peruvian name for 

 an earthy-looking ore, composed of Brown 

 Oxide of Iron, with almost imperceptible 

 particles of Native Silver, or chloride of 

 silver, disseminated through it. 



The greater part of the silver extracted 

 by mining in Peru is found in this species 

 of ore. This mineral is the Argentiferous 

 Gossan of the Cornish miners. 



Pagoda Stone, Muirhead. The Chinese 

 name for a dark brown limestone containing 

 Orthoceratites. These when polished and 

 framed are held in great estimation in 

 China as ornaments for state apartments. 

 They are said to be common at Yunnan. 

 The Chinese name of " pagoda-stone " owes 

 its origin to the general belief that the 

 Orthoceratites (which show, in their al- 

 veoles and in the septa passing through 

 them, a certain resemblance to a Pagoda) 

 have been formed underground in places 

 where the towers of the buildings in ques- 

 tion have cast their shadows on the surface 

 of the ground. 

 Pagodite. See Agalmatolite. 

 Paisbergit, Igelstrom. A variety of 

 Rhodonite from Paisbergs Iron Mine, in 

 Phillipstadt, Sweden. S.G. 3-63. 

 Analysis, by Igelstrom : 



Silica 46-46 



Protoxide of manganese . 41-88 

 Protoxide of iron . . .3-31 



Lime 8-13 



.... 0-91 



100-69 

 Palagonite, v. Waltershausen. A hy- 

 drous Scapolite. Amorphous, in grains and 

 fragments. Colour amber- yellow to yel- 

 lowish-brown, and blackish. Lustre vitre- 

 ous to resinous. Transparent to translucent. 

 Streak yellow. Easily frangible. Fracture 

 conchoidal, or uneven. H. 4 to 5. S.G. 

 2-4 to 2-7. 



Comp. 2(A1, ffe) Si + 



(Ca, Mg, Na) Si2 



6H. 





Analysis, bv v. Waltershausen 



Silica .' . . . .'41-90 

 Alumina . . . . 12-72 

 Peroxide of iron . . . 16-74 



Lime 6-71 



Magnesia .... 6-86 

 Soda 1-92 



