Ash of Eyjafjallajökull VI

24 04 2010
ash Eyjafjallajökull volcano Iceland mineral

Mineral ash from the Eyjafjallajökull volcano. This crystalline shard of mineral dust fell on Sweden on 15th-16th April 2010 as seen through a Zeiss polarizing microscope. The colour is due to birefringence typical of crystals rather than glass. This particle was removed from a larger ash particle about 1mm in size. The same particle was "glued" together with much smaller particles and was accompanied by particles of glass. A dense cloud of 1mm particles each made of shards like this can do serious damage to a jet engine. The graduated scale shown is 50 microns.

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