TRICLASITE. 



Lime 12-73 



Protoxide of iron ., . 1-00 

 Protoxide of manganese . 0-47 

 Fluoric acid . . . .0-83 

 Alumina, . . . .0-42 

 Water 015 



100-01 



BB swells up and fuses with difficulty to 

 a glass nearly transparent to milk-white; 

 with borax, forms a transparent colourless 

 glass. 



Localities. Occurs most commonly in 

 Dolomite and granular limestone — in the 

 limestone of Glen Tilt, and in many parts 

 of Scotland ; at St. Gotthard, the Tyrol, the 

 Bannat, Gulsjo in Sweden, the Pyrenees, 

 Siberfa, North America. 



Name. From a locality, the valley of 

 Tremola, in Switzerland, where it was first 

 discovered. 



Brit. j\Ius., Case 33. 



3I.P.G. Horse-shoe Case, Xos. 1007, 

 105-2, 1053. 



Triclasite, Eaiiy. '\ From t^/V, 



Triklasite, L. Gmelin, W?-/p/e,and ^Aa- 

 Diifrenoy J iri;, cleavage, in 



allusion to its threefold cleavage. See Fah- 



LUNITE. 



Trihedral Arseniate of Copper, 

 Bournon. See Clinoclase. 



Trinacrite, v. Walter shansen. A dull 

 brown micaceous mineral, the composition 



of Avhich is represented by the formula 11^ 



Si + 3ft si + 9H. 



Locality. Sicily. 



Name. From Trinacria, an ancient name 

 for Sicily. 



Tripel, Werner. See Tripoli. 



Tripe stone. The name given to An- 

 hydrite when composed of contorted plates, 

 which bear a sort of resemblance to the 

 convolutions of the intestines. It is found 

 chiefly at Wieliczka and Bochnia, in Poland. 



Triphan, Hausmann,^ See Spodu- 

 V. Kobell. f MENE. Dei'ived 



Triphane, Brochant, ffrom r^Kpa-vr,;, ap- 

 Haily. j pearhig three-fold. 



Triphyline,. Dana, Fnchs, Nicol. Rhom- 

 bic. Basal cleavage perfect. Commonly 

 occurs in coarsely granular, crystalline 

 masses. Colour greenish-gre\' ; bluish in 

 places, becoming brown and opaque when 

 weathered. Slightly translucent, with a 

 strong waxv lustre. Streak greyish-white. 

 H. 5. S.G.'3-6. 



Camp. 8(Li,Mn,Fe)P=lithia 3-42, prot- 



TPvIPLITE. 



387 



oxide of manganese 4*28, protoxide of iron 

 49-89, phosphoric acid 42-41 = 100. 



Analysis, from Bodenmais, by F. Oesten : 

 Phosphoric acid . . .44-19 

 Protoxide of iron . . 38-21 



Protoxide of manganese . 5-63 

 Lithia . , . . . 769 

 Magnesia .... 2-39 

 Lime ..... 0-76 



Soda 0-74 



Potash 0-04 



Silica .... 0-40 



100 05 



BB decrepitates and then fuses very easily 

 and quietly to a dark steel grey, magnetic 

 globule, at the same time colouring the flame 

 pale bluish-green, reddish at intervals; and 

 after moistening with sulphuric acid, a 

 deeper bluish -green. 



Easily soluble in muriatic acid ; the so- 

 lution evaporated to dryness and boiled with 

 [ alcohol, imparts a purple-red colour to the 

 flame of the alcohol. 



Locality. Rabenstein, near Bodenmais, 

 in Bavaria. 



Name. From •^?'V, three, and <ptjX'/i, family, 

 in allusion to its being composed of three 

 phosphates. 



Brit. Mus., Case 57. 



Triple Sulphlret, Phillips. See 



Bot'RNONITE. 



Triplite, Dana, Haiismann, Nicol. Rhom- 

 bic : primary form a rectangular prism. 

 Occurs in compact crystalline masses, with 

 a lamellar structure and a cleavage in 

 three directions perpendicular to each other. 

 Colour from pitch-blai^k to clove-brown. 

 Opaque. Semi-transparent in thin frag- 

 ments. Lustre resinous, adamantine. Streak 

 vellowish-grev. Fracture flat-conchoidal. 

 H. 5 to 5-5. S.G. 3-43 to 3-8. 



C'omp. Phosphate of protoxides of man- 

 ganese and iron, or Mn4P + Fe4P=4(Mn 

 Fe)P. 



Atialysis, from Limoges, by Beriielius : 

 Phosphoric acid . . . 32-78 

 Protoxide of manganese . 32 60 

 Protoxide of iron . . 31-90 



Phosphate of lime . . 3-20 



100-48 



BB on charcoal fuses readily, effervescing 

 strongly, and yielding a black, metallic- 

 shining, strongly magnetic globule, which, 

 when heated with carbnnate of soda in the 

 cc 2 



