1 6i Prof. Steinmann on Kukoxene, a New Mineral Species. 



dient of the mineral, which, therefore, is a combination of 

 phosphates, fluates, and silicates, the proportion of which, 

 however, it would be premature now to determine. 



Wavellite is the only native combination of phosphoric acid 

 and alumina; it consists, according to Berzelius, of phosphoric 

 acid 33.40, fluoric acid 2.06, alumina, 35.35, lime 0.50, oxide 

 of iron 1.25, water 26.8. There are three combinations of 

 phosphoric acid with iron ; a the earthy blue iron analyzed by 

 Klaproth, b the Vivianite by Vogel, and c the bog-iron ores 

 analyzed by Klaproth, d'Aubuisson and Pfaff, containing 



a b c 



Protoxide of iron, 47.S 41.0 Peroxide, 61 — 79 



Phosphoric acid, 32.0 26.4 2.5 — 8 



Water, - 20.0 31.0 0.1—22 



Sometimes silica or alumina are found in the last of these ; 

 but they appear not to be essential, and Professor Hausmann 

 is therefore perfectly right in considering them as being com- 

 binations of hydrous oxide of iron with phosphate of iron, in 

 variable proportions. 



The crystalline appearance of kakoxene shows, on the con- 

 trary, that it is the result of the power of crystallization ; and 

 as it is similar in some respects to the appearance of wavellite, 

 I am disposed to consider it as a combination of the same 

 kind, in which only part of the alumina is replaced by oxide 

 of iron. It is remarkable that the wavellite from Amberg, in 

 the Upper Palatinate, described by Fuchs under the name of 

 Lasionite, which likewise occurs in brown iron ore, neverthe- 

 less is perfectly white, and does not contain any iron, and is 

 therefore, even in respect to chemical composition, perfectly 

 different from kakoxene, although agreeing with it in the way 

 it occurs. 



The sandstones in which the Bohemian wavellite is found, 

 belong to the same formation of greywacke which contains 

 the beds of red and brown iron ore in the circles of Beraun 

 and Pilsen. From the circumstance, that sometimes white 

 short iron is produced from the ore of that formation, I sus- 

 pected tlve presence of phosphoric acid in it, which, in fact, 

 was found to be the case by Mr Zippe. The phosphoric acid 

 is, however, not solely confined to the iron ores, but it is like- 



