244 MOLYBDIC OUHRE. 



MoLYBDic Ochre, Shepard. See Molyb- 



DINE. 



MoLYBDiNE, Greg §• Lettsom. Occurs as 

 an incrustation or pulverulent. Colour va- 

 rious shades of yellow, to pale green. Dull. 

 Earthy. Opaque. 



Molybdic acid, or Mo = oxygen 

 33-3, molybdena 66-7 = 100. 



BB on charcoal fuses to a slag ; with salt 

 of phosphorus affords a green glass. 



Dissolves readijy in muriatic acid, and 

 the solution is turned blue by metallic iron. 



Localities. — English. Caldbeck Fells, 

 Cumberland, massive and disseminated on 

 Molybdenite. — Scotch. Mount Coryby, 

 Argyleshire. East Tulloch, Perthshire. — 

 Foreign. See those of Molybdenite with 

 which it occurs. At Altenberg in Saxony, 

 it is found crystallized in rhombic prisms. 

 (^Breithaupt.^ 



Molybdine is only used in laboratories for 

 extracting molybdenum, and for making 

 molybdic acid. 



Brit. Mus., Case 39. 



MoNAziTE, Breithaupt. Oblique. Occurs 

 in oblique rhombic prisms, generally small 

 and tabular, or very short, with an imper- 

 fect basal cleavage. Colour hyacinth-red, 

 clove-brown, or brownish-yellow. Translu- 

 cent at the edges. Lustre dull-resinous. 

 Streak white. Brittle. H, 5 to 5-5. S.G. 

 4-9 to 5 02. 



Fig. 293. 



Comp. (Ce, La, Th)3 P. 





Analysis, by Kersten ; 





Sesquioxide of cerium . 



26 00 



Oxide of lanthanum . 



23-40 



Thoria. 



17-95 



Protoxide of manganese 



1-86 



Binoxide of tin . 



2-10 



Lime .... 



1-68 



Phosphoric acid . 



28-50 



Potash and binoxide of tita- 





nium . . . . 



traces 



101-49 



BB infusible, but turns grey, or greenish- 

 yellow. 



Dissolves in muriatic acid with evolution 

 of chlorine, leaving a white powder undis- 

 solved. 



MONTICELLITE. 



Localities. Near Slatoust in the Ural, in 

 granite, with flesh-red Felspar. Yorktown, 

 Westchester county, New York, with Silli- 

 manite. The gold -sand of Kio Chico in 

 Antioquia. Halle, Norway. 



Brit. Mus., Case 57. 



Name. From ^v«?o;j to live alone. 



MoNAZlTo'iDE, Hermann. Probably only 

 a variety of Monazite, with which it is 

 identical in crystallization and external 

 characters. Colour brown. H. 5. S.G. 5281. 



MoNHEiMiTE. A name given to Kapnite, 

 in honour of Von Monheim, by whom it has 

 been analysed. See Kapnite. 



MoNOPHANE, Dufrenoy, is Epistilbite : it 

 occurs on Quartz in small white crystals, 

 apparently derived from oblique rhombic 

 prisms. Scratches phosphate of lime. S.G. 

 2-05, 



BB fuses. 



Locality. Unknown. 



MoNRADiTE, Erdmann. Massive, gran- 

 ular ; also foliated. Colour yellowish, with 

 a tinge of red. Lustre vitreous. Translu- 

 cent. H. 6. S.G. 3-267. 



Com,p. (Mg, Fe)5 is'i^ + H. 



Analysis, by Erdmann : 



Silica ..... 56-17 

 Magnesia .... 31-63 

 Protoxide of iron . . 8-56 

 Water 4-04 



100-40 

 BB alone infusible: with borax affords 

 an iron reaction. 

 Locality. Bergen in Norway. 

 Name. After Mons. Monrad. 

 MoNROLiTE, Silliman. A variety of Ky- 

 anite from Monroe, Orange co., New York. 

 Analysis, by Smith 8f Brush : 



Silica 37-20 



Alumina .... 59-02 

 Peroxide of iron . . . 2-08 

 Loss by ignition . . .1-03 



99-33 



Brit. Mus., Case 32. 



MoNTiCELLiTE, Brooke. A variety of 

 Chrysolite found in small imbedded crystals, 

 having the general aspect of Quartz. Colour 



Fig. 294. 



yellowish : sometimes colourless and nearly- 

 transparent. H. 5 to 6. S.G. 3*245 to 3-275. 



