6 



APPENDIX. 



289. EpipJianite. Igelstrom, CEfv. Ak. Stockh., 1868, p. 29. This name has been given to 

 a chlorite like mineral from Tvaran in Wermland, Sweden. The composition Igelstrom found 

 to be Si 37-10, S12P13, Fe 20"00, Mn tr, Mg 14-03, H 7-83=100-09. It approaches Kenngott's 

 eukamptite (p. 307) and gives the same formula plus one atom of water R- Si+5l Si +2 H. 



449. EuraUte. A name given by F. J. Wiik to a chloritic mineral occurring in seams in 

 clefts of hyperite rock in the parish of Eura, Finland. It is apparently amorphous, but 

 breaks under the hammer into prismatic fragments. H.=2 5. G-. =2'62. Color dark -green 

 to black. B. B. fuses easilv to a magnetic globule. Soluble in muriatic acid. An analysis 

 gave Si 33-68, Xl 12-15, £e 6"80, Fe 15-66, Mg 17 '92, Ca 1"34, H 11 49=99-04. Wiik sug- 

 gests that this composition is near delessite, which it also resembles in its mode of occur- 

 rence. (Jahrb. Min. p. 357.) 



474. Ferro-ih?ie?iite, a name given to a variety of columbite from Haddam, Connecticut 

 (Hermann, J. pr. Cheni., II. ii. 118). 



93 A. Glaucopykite. F. Sandberger, J. pr. Chem., II. i. 230. Orthorhombic. Planes 

 i-i, I, m-l. H.=4'5. G. =7'181. Lustre metallic. Color light lead-gray to tin-white. 

 Streak grayish -black. Composition Fe S 2 + 12 (Fe, Co, Cu) (As, Sb) ! =S 2"47, As 69-45, 

 Fe 28-08. Analysis R. Senfter (1. c.) : 



s 



As 



Sb 



Fe 



Co 



Cu 



2-36 



66-90 



3-59 



21-38 



4 67 



1-14=100-04 



In the closed tube gives a sublimate of arsenic with only a small amount of sulphid. B. B. 

 on charcoal gives arsenic fumes with an antimony coating. After roasting yields with soda 

 a magnetic slag with spangles of metallic copper. With the fluxes reacts for iron and cobalt. 

 Decomposed by nitric acid leaving a residue of antimonic acid. Found in the mines of 

 Guadalcanal in Andalusia, Spain. Belongs near Lolingite, p. 77. 



Guano Minerals. C. U. Shepard, Rural Carolinian, i. 470. The substances described 

 occur in the guano of Guanape Island, 400 miles north-east of the Chincha Islands. 



Guanapite occurs in irregular balls and veins looking bike red rock-salt but having a rhom- 

 bic cleavage. H. = l— 2. G. =23. Soluble in 4—5 pts. of water at 60°. Taste bitter and 

 saline. Analysis gave sulphate of potash 67 -75, sulphate of ammonia 27 "88, oxalate of am- 

 monia 3 -75 = 99 • 38. It loses ammonia on exposure to the air. Heated to redness leaves a 

 residue of about 70 pr. ct. of sulphate of potash. It is near Taylorite (p. 614) in composition. 

 Guanoxalate is stated to be a pseudomorph of birds' eggs ; the specimens are exteriorly 

 white, " and seem to retain portions of the original shell, but these when tested seemed to be 

 a mixture of phosphate and oxalate of lime." Within the substance is foliated and has a 

 rhombic cleavage. Color cream white; lustre pearly; translucent. H.=l— 2. G. =1'58. 

 When heated swells up, turns black, partially fuses, gives off ammonia fumes, and leaves 

 a white residue of sulphate of potash. Composition stated to be sulphate of potash 40 "20, 

 oxalate of ammonia 29 5 7, water 30 46=100-23 — a very doubtful compound. Oxammite, plios- 

 pfiammite, and biphosphammite are other names given by Shepard for supposed new species 

 consisting of oxalate of ammonia, phosphate of ammonia, and biphosphate of ammonia. 



422 A. Gumbelite. F. von Kobell, Ber. Ak. Miinchen, March 5th, 1870. 

 In thin, short fibrous layers in clay slate. Color light greenish- white. Translucent. Lus- 

 tre pearly. Soft and flexible. Analysis, v. Kobell (1. c. ) : 



Si £1 Fe Mg K H X a 



5052 31-04 3-00 1-88 318 7'00 l-46=98-08. 



( a ) Undecomposed mineral. 



The oxygen ratio of R, K, Si and H is as 1 : 12 : 21 : 5, which scarcely leads to a satisfac- 

 tory formula. In the closed tube yields water. B. B. exfoliates somewhat like pyropkyllite. 

 Fuses at 4. Not acted upon by acid. 



Found at Xordhalben near Steben, in Oberfrankem The composition approaches that of 

 pinite or neurolite (p. 482). 



HaUite. A name given by A. R. Leeds to a flexible micaceous mineral of a brown color, 

 occurring in Chester Co., Pa., and supposed to possess distinguishing optical properties. 

 (Jour. Frank. Inst., in. lxii. 70.) 



