The Causes of Tungsten Oxides’Colours

Details: Category: Tungsten Information; Published on Monday, 02 February 2015 18:16; Written by cq; Hits: 1503

The colours of tungsten oxides are due to light absorption and selective reflection (and/or transmission). This is called subtractive colouration. The colour of the oxides changes with the electronic properties of the oxides which, perse, are a result of the crystal symmetry of the solid. Changes in size, crystallinity or temperature can significantly change the colour, as demonstrated in this article. Chemical vapour transport of tungsten renders the preparation of single crystals of tungsten oxides, but also tungsten metal, to further exploit their interesting structural, optical and electronic properties.

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