STRATOPEITE. 



Stratopeite, Igelstrom. Probably an 

 altered form oi Vxhodonite (Manganese Spar). 

 Occurs amorphous-massive, of a pitch-black 

 colour, or brown, or brownish-red, in thin 

 splinters. "Yields to the knife, and affords a 

 brown streak. Fracture flat-conchoidal. 

 S.G. 2-64. 



^ Comp. MgS Si2 + 4 (5* n, ¥e) Si + 12H. 

 Analysis, by Igelstrom : 



Silica 85-43 



Peroxide of manganese . 32-41 



Peroxide of iron . . . 10-27 



Magnesia .... 8-04 



Water .... 13-75 



100-00 

 BB fuses to a black transparent globule. 

 Locality. — Pajsberg's iron mine, Philip- 

 stadt, Sweden. 



Stream Tin. Rounded fragments of Oxide 

 of Tin (Cassiterite). They are so called 

 from the circumstance of their being ob- 

 tained by washing the deposits formed, in 

 the valleys, by the disintegration of the 

 rocks constituting the neighbouring hills. 



3I.P.G. Principal floor. Wall-case 8, 

 Nos. 413 to 435 (British) ; 39 (East Indies) ; 

 37 (Victoria and Australia). 



Striegesan, Breithaupt. A variety of 

 Wavellite, from Striegis, in the Erzgebirge. 

 Striped Jasper, Kirwan. See Eibbon 

 Jasper. 



Stroganowite, Hermann. An altered 

 form of Scapolite, which it much resembles 

 both in form and appearance. Colour clear, 

 pale oil- green, or yellowish green. Lustre 

 subvitreous, inclining to greasy. Cleaves 

 in two directions, nearlv at right angles to 

 each other. H. 5-5. S'G. 2-79. 

 Analysis, by Hermann : 



Silica 40-58 



Alumina .... 28-57 



Lime 11-05 



Chloride of lime . . . 14-55 



Soda 3-50 



Protoxides of iron and man- 



• 0-89 



STRONTIAXITE. 



365 



100-14 



Locality. Found in loose blocks near the 

 river Sljudenka, in Dauria. 



Name. After Count Stroganow. 



Stroganowite agrees with Cancrinite, ex- 

 cept that a considerable proportion of lime 

 replaces a corresponding proportion of soda. 

 It was subsequently united by Dufrenoy to 

 Wernerite, in consequence of its rectangular 

 cleavage. 



Strohsteix, Werner. See Carpholite. 



Stro^mbolo. See Lig>'ite. 

 Stromeyerine, Beudant, or Strojiet- 

 ERiTE, Haidinger. Rhombic : isomorphous 

 with Copper Glance. Occurs also compact. 

 Colour dark steel-grey. Lustre strong me- 

 taUic. Streak shining. Sectile. Very brittle. 

 Fracture brilliant, granular and impeifect- 

 conchoidal. H. 2-5 to 3. S.G. 6-25. 



Comp. Sulphide of silver and copper, or 

 Cu2 S + Ag S = sulphur 15-7, silver 52-9, 

 copper 31-4 = 100. 



Analysis, from Eudolstadt, by Sander ; 

 Sulphur .... 15-92 



Silver 52-71 



Copper . . . . 30-95 

 Iron 0-24 



99-82 



BB gives off an odour of sulphurous acid, 

 and fuses readily to a grey semi-malleable 

 globule, having a metallic lustre. Colours 

 fluxes green by the copper it contains. Cu- 

 pelled with lead, yields silver. 



Dissolves in nitric acid, with separation of 

 sulphur. 



Locality. Schlangenberg, or Zmeino- 

 gorsk, south of Barnaoul, in Siberia, asso- 

 ciated with Copper Pyrites, Calc Spar, and 

 Hornblende. Rudolstadt, in Silesia. Co- 

 piapo, in Chili. Combarvalla, in Peru. 



Name. After Stromeyer, by whom it 

 was first distinguished and described as a 

 new species. 



Brit. Mus., Case 10. 



Stromite. a variety of Diallogite, na- 

 med after the Director of Mines, Strom. 



Stro3IXite. a name given by Traill to 

 the Strontianite from Stromness, in the 

 Orkneys. See Barystrontiaxite. 



Stroxthian, TFerner. Stroxthiaxite, 

 - Kirwan. Stroxtiaxe, Jameson. Strox- 

 TIAXE CARBONATEE, Haily. See Strox- 

 tianite. 



Stroxtiaxe suLFATEEj^HaiYy. See Ce- 

 lestixe. 



Stroxtiaxit, Hausmann, v. Kohell, Nau ■ 

 mann. Strontiaxite, Nicol, Dana, Greg §• 

 Lettsom. Rhombic : primary form a right 

 rhombic prism. Occurs crystallized in hexa- 

 hedral prisms, which are modified on the 



Fig. 416. 



L4j; 



\ 



Fig. 417. 



edges, or terminated by pyramids : also in 

 fibrous, stellated, columnar-globular, and 



