Dódony, István

Kovács Kis, Viktória

English

The association and structural relationships of moganite, a recently described silica polymorph, and microcrystalline silica were studied using petrographic microscopy. X-ray powder diffraction, and scanning and transmission electron microscopy. We studied a chalcedony sample, a common fibrous microcrystalline silica variety from Gyongyossolymos, northern Hungary. Morphological and optical characteristics such as fiber striations and wrinkle banding and the association of mineral phases (quartz, moganite and cristobalite) are reported. Selected-area electron diffraction patterns of twinned domains with periodic and non-periodic twin planes are discussed in relation to moganite and quartz structures

Kovács Kis Viktória

Dódony István

University of Szeged

Mineralogical and microstructural features of chalcedony from Mátra Mts, Northern Hungary - a tem study

http://acta.bibl.u-szeged.hu/25120/1/mineralogica_045_fasc_001_101-106.pdf

Mineralogical and microstructural features of chalcedony from Mátra Mts, Northern Hungary - a tem study

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University of Szeged