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File:Bismuth crystal macro.jpg

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Description
English: Bismuth crystal. Bottom front edge has a length of about 3.5cm. Iridescent colour is created due to interference effects in a thin oxide layer, which forms when the hot crystal is pulled out of the bismuth melt.
Español: Cristal de Bismuto. El borde frontal inferior tiene un largo de aproximadamente 3.5cm. El colour iridiscente es creado debido a efectos de interferencia en una capa delgada de óxido, la cual se forma cuando el cristal caliente es sacado del bismuto derretido.
Français : Cristal de Bismuth. L'arête du bas mesure environ 3,5cm. La couleur irridescente est due à des effets d'interférences dans la fine couche d'oxyde, qui se forme lorsque le cristal chaud est sorti du bismuth liquide.
Date 5 January 2006
Source Own work
Author Dschwen
Picture of the day

This image was selected as picture of the day on Wikimedia Commons for 8 February 2006. It was captioned as follows:

English: Synthetic Bismuth crystal, discolorations due to a thin oxide layer.
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