MALTHE. 



Localities. Stein dorfel, in basalt. Beraun 

 in Bohemia, in greenstone. 



Brit. Mus., Case 26. 



Malthe, Beudant. See Eakthy Bi- 

 tumen. 



Mancinite. a broTvn silicate of zinc 

 from Mancino, near Leghorn. 



Mangan-amphibole. The name given 

 by Hermann to Manganese-spar from Cum- 

 mington, Massachusetts, U. S. S.G. 3-42. 



Analysis, by Hermann : 



Silica 48-91 



Protoxide of manganese . 46'74 



Lime 2-35 



Magnesia .... 2-00 

 Protoxide of iron . . trace 



100-00 

 Manganblende, Breithaupt Manga- 

 nese Blende, Jameson. Cubical. Occurs 

 in cubes and octahedrons. Cleavage perfect, 

 parallel to the faces of a cube. Generally 

 occurs massive, sometimes botryoidal. Co- 

 lour iron-black, acquiring a brown tarnish 

 by exposure. Lustre submetallic. Streak 

 dark green. Opaqu.e. Fracture fine-grained. 

 H. 3-5 to 4. S.G. 4. 



Comp. Sulphide of manganese, or Mn S = 

 manganese 63-3, sulphur 36-7 = 100. 

 Analysis, from Mexico, by Del Rio ; 

 Manganese .... 54-5 



Sulphur 39 



Quartz 6-5 



100-0 



BE fuses "with difficulty at the thinnest 

 edges. 



Soluble in acids with the evolution of 

 abundance of sulphuretted hydrogen. 



Localities. The gold mines of Nagyag in 

 Transylvania, -svith Tellurium, &c. Preciosa 

 Mine, Puebla, in Mexico; with Tetrahe- 

 drite. 



Brit. Mus., Case 5. 



M. P. G. Principal Floor, Wall-case 20. 



Manganese Aksenical, Dufrenoy. See 

 Kaneite. 



Manganese Hydrate Cuprifere, See 

 Melaconite, Kupferschwarze, and Pe- 



LOKONITE. 



Manganese Noir, Brochant. See Haus- 



MANNITE. 



Manganese Oxide Carbonate, Hauy. 



See DiALLOGlTE. 



Manganese Oxide Hydrate, Haily. 

 See Hausmannite. 



Manganese Oxide Hydrate Concre- 

 TioNNE, Haiiy. See Psilomelane. 



MANGANITE. 227 



Manganese Oxyde Metalloide, Haiiy. 

 See Manganite. 



Manganese Phosphate. See Triplite. 



Manganj^se Silicate '\ 

 Rose, Dufrhioy. f See Rhodo- 



Manganese Silici- t nite. 

 Fere, Haiiy. J 



Manganese Spar, Jameson. See Rho- 

 donite. 



Manganese Sulfure,^ 

 Haily. I See Mangan- 



Manganglanz, Leon- T blende. 

 hard. j 



IManganite, Haidinger, v. Kohell, Nicol. 

 Rliombic: primary form a right rhombic 

 prism. Occasionally hemihedral. Occurs in 

 columnar crystals striated vertically, and 

 often grouped in bundles ; also fibrous and 

 massive, or radiating; granular. Colour 

 dark steel-grey, passing into iron-black. 

 Opaque; sometimes brown by transmitted 

 light, in very thin fragments. Lustre 

 submetallic. Streak reddish-brown; black 

 in massive varieties. Rather brittle. Frac- 

 ture uneven. H. 3-5 to 4. S.G. 4-2 to 4-4. 



Fig. 276. 



Comp. Hydrated peroxide of manganese, 



M^n, H=: peroxide of manganese 89-79 (man- 

 ganese 62-78, oxvgen 27-22), water 10-21 = 

 100. 

 Analysis, from Ihlefeld, by Turner ; 

 Manganese .... 62*77 

 Oxygen .... 27-13 

 Water .... 10-10 



100-00 

 BB alone infusible : with borax affords a 

 violet-blue globule. 



Completely soluble in muriatic acid, with 

 evolution of chlorine. 



Localities. — Englii-h. Upton Pyne, Devon- 

 shire : fig. 276. Mendip Hills (at Churchill, 

 &c.) Somerset. Cornwall ; Botallack Mine, 

 St. Just; Restormel Iron-mines, acicular; 

 massive at Trebartha ; Veryan and Indian 

 Queen Mine. Hartshill, Warwickshire, la- 

 mellar and compact. — Scotch. Granam in 

 Aberdeenshire, j?,(7. 276. — L-ish. Near Howth, 

 CO. Dublin. Cork ; Ross, Leap, Noharval, 

 Castle ventr}'-. Kilfaunabeg near Ross. — 

 Foreign. Ihlefeld in the Harz, associated 

 with Calc Spar and Barvtes, in veins tra- 

 q2 " 



