14 * 



x * APPENDIX. 



393 A. Reissite. A name given by K. v. Frifczsch to a zeolitic mineral from Santorin 

 According to Hessenberg (his Min. Nc-tizen, No. 9, p. 22) it is orthorhombic with the axial 

 relation for the brachydiagonal, macrodiagonal, and vertical axis. 04231 : 1 : 0-2866 Ob- 

 served planes I, i-i, l-\ 2-2. Cleavage brachydiagonal. Lustre vitreous. Colorless to white 

 Fusible with intumescence to a blebby enamel. Gelatinizes with acids more readily after 

 fusion than before. The solution contains lime and alkalies. Hessenberg considers it prob- 

 able that reissite is identical with Breithaupt's species monophane, and distinct from 

 epistilbite. 



125. Rionite. A name given by Brauns to a bismuth-tetrahedrite from Cremenz Ein- 

 fischthal in Wallis Canton, Switzerland. It has a conchoidal fracture, an iron-black 'color, 

 black streak, and greasy-metallic lustre. An analysis gave S 29 "10, As 11-44 Sb219 Bi 

 1307, Cu 37-52, Ag 0"04, Fe 6-51, Co 1 "20=101 "07. Found associatad with chalcopyr'ite. 

 It is worked as an ore of bismuth. The composition places it near annivite p 103 (T 

 Petersen in Jahrb. Min., 1870, 590). 



The name Rionite was used formerly for a. supposed selenid of zinc, described by Del Rio, 

 and Riolite for a supposed selenid of silver as well as the preceding, but both names have 

 been dropped from the science, the material on which they were founded being only a 

 mixture. 



807 A. Rosthornite. H. Rofer, Jahrb. Min., 1871, p. 561. 



In lenticular masses in coal. G.=l - 076. Lustre greasy. Color brown, with garnet-red 

 reflections: in thin splinters wine -yellow. Composition : -6 24 H 40 O. Analysis by Mittereg- 

 ger (1. c. ) : 



C H O 



I 84 42 11-01 4-57=100-00 



At 96°C. commences to melt to a viscous brownish-red mass, which at 160° gives off bub- 

 bles and at 205° white fumes, heated to 225° the evolution of gas ceases, leaving a thin dark 

 purplish-red fluid. Insoluble in dilute nitric acid as also in potash or alcohol. Slightly solu- 

 ble in warm ether and entirely so in warm oil of turpentine. Completely soluble in benzole 

 at ordinary temperatures. From Sonnberge, Carinthia. Resembles jaulingite in physical 

 characters, while it is near euosmite in chemical composition 



499. Sarcopside. Sarkopsid, M. Webski/, ZS. G. Ges., xx. 245, 1868. 



Monoclmic '? occurring in irregular ellipsoids, sometimes in distorted six-sided plates. 



H. =4. G. =3 "692— 3 '730. Lustre glistening to silky and greasy. Color, on fresh surface, 

 flesh-red to lavender-blue. Translucent in thin splinters. Streak straw-yellow, some grains 

 give a green color. Composition : 4R 3 P + (R F1 + Jj H) Websky : 



p 



Fe 



Fe 



Mn 



Ca 



H 



Fl 



34 73 



8 83 



3053 



20-57 



3-40 



(1-64) 



undet. 



In the closed tube gives water which reacts for fluorine, turns dark -brown and assumes a 

 sub-metallic lustre. Fuses very easily, may be melted to a bead on platinum wire, and this im- 

 parts a blue-green color to the outer flame. With the fluxes reacts for iron and manganese, 

 and fused with bi-sulphate of potash in a closed tube reacts for fluorine, coloring brazil-wood 

 paper and etching the tube. Soluble in dilute muriatic and sulphuric acids. 



Occurs with vivianite and hureaulite in a granite vein on a ridge between Michelsdorf and 

 the valley of the Muhlbach in Silesia. This mineral corresponds so.closely to triplite (p. 543) 

 in chemical composition and pyrognostic characters, as also in density and hardness, as to 

 make it exceedingly probable that it may be a variety of that species. 



163 B. Sellaite. Siruver, Atti della R. Accad. di Torino, iv. 1868, 35. 



Tetragonal, Jon 1=123° 30', i-i on i-3 161° 34'. Cleavage parallel to i~ and ?'-£ perfect. 

 H. =5. G. =2 972. Lustre vitreous. Fracture conchoidal. Colorless. Transparent. Com- 

 position : MgFl ? In small fragments melts in the flame of a candle with intumescence. 

 Insoluble in water, also in acids, except concentrated sulphuric acid, with this it evolves 

 fluohydric acid. The sulphuric solution gave 39 -64 pr. ct. of magnesia, which with the other 

 chemical and physical properties of the mineral leads Striiver to consider the mineral a fluorid 

 of magnesium analogous to fluorite in composition. 



Found with anhydrite at Geibroula in Piedmont. 



659 A. Simoxtite. G. TscJiermak. Ber. Ak. Wien, November Heft, 1869. 



Monoclinic. Ratio of orthodiagonal, clinodiagonal, and vertical axis 1 : - 7453 : 0'5041 ; in- 



