Health & Environmental Research Online (HERO)


Print Feedback Export to File
7788469 
Journal Article 
Formation of manganese oxides in soils 
Vodyanitskii, YN; Vasil'ev, AA; Lesovaya, SN; Sataev, EF; Sivtsov, AV 
2004 
Yes 
Eurasian Soil Science
ISSN: 1064-2293
EISSN: 1556-195X 
37 
6 
572-584 
English 
WOS:000222292800003 
The frequency of occurrence of manganese oxides differs in fine earth of steppe and forest soils. Manganese oxides are more abundant in fine earth of steppe and forest-steppe soils as compared to taiga soils. The spectrum of Mn minerals is found to be wider in steppe soils (five oxides, i.e., vernadite, todorokite, cryptomelane, bernessite, and hausmannite) than in taiga soils (only three oxides, i.e., vernadite, todorokite, and cryptomelane). The frequency of occurrence of manganese oxides reaches on average 62% in ortsteins versus 33% in the fine earth of taiga soils. Vernadite absolutely predominates among manganese oxides in ortsteins, which is proven by a high share (70% on average) of amine-soluble Mnh-amine in its total amount. The share of vernadite assessed by the Mnh-amine value increases with a growing content of Mn in ortsteins. In humid regions, vernadite is formed only in carbonate-free horizons of raw-humus burozems. 
lithiophorite