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Two-dimensional natural pyrite crystals and their formation

Published online by Cambridge University Press:  05 July 2018

Z. Sawlowicz ,
A. Łatkiewicz  and
E. Stefaniak
Z. Sawlowicz
Affiliation:
Institute of Geological Sciences, Jagiellonian University, ul. Oleandry 2a, Kraków, Poland
A. Łatkiewicz
Affiliation:
Institute of Geological Sciences, Jagiellonian University, ul. Oleandry 2a, Kraków, Poland
E. Stefaniak
Affiliation:
Institute of Physical Chemistry, Lublin Catholic University, Lublin, Poland
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Abstract

Two-dimensional pyrite crystals (40–80 µm wide and 2–3 µm thick) and large thin crusts are reported from the mudstones from the Carboniferous coal basin in Poland. Crystals occur on a flat surface, originally probably a crack in the rock, and are composed of uniform particles (150–200 nm wide). A hypothetical pathway of the formation of 2D pyrite crystals is presented: (1) formation of pyrite particles (or monosulphide precursors) in the suspension introduced onto the surface of the crack, and forming a film with a smooth meniscus at the air/suspension interface on the rock substrate; (2) thinning of the suspension film due to the water loss, increase of particle concentration, and formation of the first monolayers; (3) growth leading to the formation of thin crystals complying with pyrite crystallography.

Keywords

two-dimensionalpyriteuniform crystalscoalmodel
Type
Research Article
Information
Mineralogical Magazine , Volume 69 , Issue 4 , August 2005 , pp. 455 - 461
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2005

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