Nordstrandite – A new occurrence from Hungary | Szegedi Tudományegyetem, Ásványtani, Geokémiai és Kőzettani Tanszék

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Mai névnapok:

Károly, Karola

Nordstrandite – A new occurrence from Hungary

Reference:
Acta Mineralogica-Petrographica, Szeged 2008, Vol. 48, pp. 43-48.

Szerző:
Péter- Kovács-Pálffy
Felicitász Velledits
Péter Kónya
Mária Földvári
Kamilla Gálné Sólymos

Abstract:
A new occurrence of nordstrandite was described from NE Hungary (Aggtelek-Rudabánya Mts). This mineral appeared in red clayed matrix of conglomerates accumulated in dolines from Triassic platform limestone. It was investigated by X-ray diffractometry, thermal analyses, SEM-EDS. By X-ray analyses it was possible to separate the nordstrandite from other crystalline modifications of Al(OH)3. Nordstrandite appears as individual or radial crystal aggregates in voids (fissures or cavities). In our case the nordstrandite precipitated from amorphous Al(OH)3 gels, from the alkaline phreatic solutions, infiltrating along the fissures of the clayed matrix of conglomerates. Nordstrandite was most probably formed during Late Miocene-Pleistocene.

 

Letöltés

 

acta2008-2009, Aggtelek-Rudabánya Mountains (NE Hungary), Nordstrandite, SEM-EDS., terra rossa, thermal analyses, X-ray diffractometry

 

 




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