Mineralogy. 187 



Besides these there are found metals of the alumina group (with oxides 

 soluble in caustic alkalies) , of the Zirconia group (with oxides insoluble in 

 alkalies, but precipitated from their salts by sulphate of potash), and of 

 the Yttria group (oxides insoluble in alkalies, soluble in carbonate of am- 

 monia, and not precipitated by sulphate of potash). The two latter groups, 

 which have not been previously found in meteorites, form the principal part 

 of the undissolved gray porous mass, but their quantity is so small that the 

 author has been unable to determine with certainty what members of 

 these groups are present. 



The crystalline grains, which are less soluble than the rest of the mass, 

 consist of iron and carbon, with small quantities of sulphur and phospho- 

 rus. Although it is difficult, if not impossible, to stop the solution at the 

 proper point, so as to insure this substance being pure, Forchammer has 

 made two analyses, and found 11*06 and 7*23 per cent, of carbon. A car- 

 bonate of iron having the formula Fe 2 C, would contain 9*66 per cent, of 

 carbon, and this is probably its constitution. Its specific gravity is 7' 172. 



This meteoric iron belongs to a very rare variety, and contains so large 

 a quantity of carbon, that it may be called meteoric cast-iron. That found 

 in Greenland by Parry, as well as another specimen mentioned by Forch- 

 ammer were perfectly malleable. — Poggendorff's Annalen, vol. 93, p. 155. 



Analysis of some Minerals. By Carl Von Hauer. 

 Delvauxite. — The analyses of this mineral differ greatly from those 

 given by Delvaux. Hauer finds a much smaller quantity of water and 

 only traces of carbonic acid. His numbers for the air-dried mineral 



I. II. 



Silica 2-08 1-24 



Lime 7-07 7*39 



Peroxide of iron 46*40 46*34 



Carbonic acid trace trace 



Phosphoric acid 1867 17*68 



Water , 26*04 26*71 



100*27 99*36 



No. 1, from Berneau, Belgium ; No. 2, from Leoben in Styria. 



The mineral when dried over chloride of calcium, lost 9*02 and 9*92 

 per cent., and abstracting this quantity of water and the silica, which is 

 obviously a fortuitous constituent, the results stand thus, — ■ 



I. II. 



Peroxide of iron 5203 5254 



Lime 7*94 8*37 



Phosphoric acid 20*93 20*04 



Water 1908 19*04 



99*98 99*99 



Leading to the formula 2(CaO) P0 5 -f 5 (Fe 2 3 ) P0 5 + 16 HO, which 

 is analogous to that given by Berzelius for the uranite of Autun, 2 (CaO) 

 P0 5 + 4 (Ur 2 3 ) P0 5 + 15 HO. 



KaJcoxene.' — The specimen analysed consisted of silky needles and 

 rounded masses, and also of dirty green kidney-shaped forms resembling 

 wavellite. The former only were analysed. 



Insoluble in hydrochloric acid. 3*63 



Peroxide of iron 45*05 



Lime trace 



Phosphoric acid > 18*56 



Water 30*94 



98*18 



