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Weathering Sequence and Alteration Products in the Genesis of the Graskop Manganese Residua, Republic of South Africa
Birnessite Dolomite Infrared spectroscopy Manganese Nsutite Petrography Wad Weathering X-ray powder diffraction
2012/1/10
Although numerous, small, manganese oxide deposits associated with dolomite in the Eastern Transvaal escarpment, Republic of South Africa, have been known for many years, their mineralogical make-up i...
The Alteration Products of Potassium Depleted Oxybiotite
Alteration Products Potassium Oxybiotite
2012/2/15
Artificial weathering of biotites, which contain various levels of structural ferric iron, by NaCl and NaBPh4 solutions produces minerals and structures similar to those described for naturally weathe...