130 ^ Fourth Supplement to Danas Mineralogy, 



UnANTTE [p. 430]. — The yellow phosphate of uraniiim is not isomorphous -with 

 the green phospl^ate, according to Descloizeaux (L'Institut, No. 1207), for it has two 

 axes of double refraction, or is trimctricj and not dimetric. 



Vanadinite [p. 362, and 11, III]. — According to Rammelsberg {Fogg, xcviii, 249), 

 occurs in limestone in Carinthia near Windischkappel. Color bro^vnish, the smaller 

 crystals clear yellow ; no distinct cleavage ; largest crystals 3 mm, long and 1 thick. 

 G.=6-83, Canaval, 6-886, Rammelsberg. Form near that of pyromorphite; hexag- 

 onal prism /(oo) with the pyramids 1,2, and 2-2. 1:1=142° 30', 2 : 2=129° (ap- 

 proximately) ; /: 1=130^; /: 2=149° 12'. The angle 1 ; 1 in pyromorphite la 

 142^ 12' according to Miller (142° 15' from Bleistadt, G. Rose), 141° 3' f/om Mies, 

 G. Rose. Rammelsberg obtained on analysis, 



V 17-41 'P 0-95 f b 69 68 Pb 6o2 Cl 2-23 = 9679 



the loss in which is stated to be vanadic acid, making for the acid 20"62, and afford- 

 ing very nearly the formula tb'v -j~iPb CI = yanadic acid 19'60, oxyd of lead 70*67, 

 lead 7*29, chlorine 2-44. 



Konngott reckons the loss (Pogg. xcix, 95) as oxygen, and makes the acid YO' in- 

 stead of VO', and thus approximates the formula to that of pyromorphite, it be- 



coming T*b® v+iPbCI=Yanadic acid (VO^) 20^2, phosphoric acid 0'97, oxyd of 

 lead 69*54. chlorine 2"21, lead 6*46. One-fifteenth of the acid is phosphoric. 

 Dr. J. Schabus has examined the crystals from Obir near Windischkappel in Ca- 



rinthia. The ditfercnt crystals have the following planes.— (1) /, 1 ; (2) /, 1, f ; (3) 



/. 1, 2-2; (4) 0,1 1, §.; (5) 0, I 3, 1-2. Angle of pyramid 1, 142° 58' (pyra- 

 midal); 78° 52^ (basal, in different crystals 78° 46'— 78° 54'); 0:1=140° 34'. 

 Schabus has obtained the following for the corresponding basal angles of mimetene 

 and pyromorpliite. Mimetene from England 79° 24'; from Johanngeorgenstadt 

 79° 44', 79° 56', 80° 4', 80° 43'; from Zschopau, 80° 11'; from Pennsylvania, 80° 

 SO'; of Pyromorphite from Bleistadt, 80^^ 40',— Pogg. c, 297. 



YiviANiTK fp. 415. and III]. — A massive indigo-bUie vivianite from Allentown, 

 Monmouth Co., N. J., contains according to C A. Kurlbamn, Jr. (Am, J. Scl, [2], 

 xxiii, 422): 



^ S-acS 3Pe 18-45 te 27*62 fig 0*03 II 25*60 = 101*35 



Warwickite fp. 395, and 11. — Prof. Sliepard states, in his Mineralogy, that the 

 larger crystals of "VVarwickite afford BB. fluorine, and contain a large proportion 

 of manganese. 



[The examinations of Hunt, and Smith and Brush, of the crystals both large and 

 small, have not detected any fluorine. The original analysis by Prof. Shepard (Am. 

 J. Sci., xxxvi, 87, 1839) is stated to liave afforded, Titanium 64'7l, iron 7*14, yttrium 

 080, fluorine 2733, aluminium a /rai.'#=99-98, in which no manganese is mentioned, 

 besides no magnesia or boracic acid. — d.] 



"Wavelute [p. 423]. — At Steamboat, Chester Co., Pa., in a mine of liraonite, wa- 

 rellite has been found in great abun Jance forming stalactites and in botr\^oidal forma. 

 The stalactites are onefourth of an inch or more thick and have a filiform centre of 

 hydrated iron ore. The exterior is sornetirx\es smooth like Gibbsite, which it then 

 closely resembles, but is usually drusy with minute rhombic crystals transparent or 

 nearly so; and frequently coated with atKither mineral yet undetermined. Dr. 

 Genth has examined the waveUite and obtained for its composition (Am. J. Sci., [2], 

 xxiii,423): 



P 34-68 Si 36-67 fi 2829 1 tract Limonite 022 =-99-86 



[The pri^^ms afford the angle 12S°— 124°. — n.] 



Wolfram [p. 351, and I, II, III].— A fine crystal frr^m Zinnwald afforded Weid- 

 inger (Zeitschr. Pharm., 1855, 71, Lieb. u. Ivopp., 1865, p. 963): 



W Ti f^ iin 6a . S 



7562 1-89 8-73 12'17 2*27 0*31 = 100'99 



