Witherite crystals, SEM

Witherite crystals, SEM

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Credit: EYE OF SCIENCE/SCIENCE PHOTO LIBRARY

Caption: Witherite crystals. Coloured scanning electron micrograph (SEM) of crystals of witherite, or barium carbonate. These crystals have been grown in the presence of block copolymers, blocks of different polymerised monomers, leading to the formation of different crystals structures. Two crystal types are seen here (grey and green). Witherite is a rare mineral found in low temperature mineral veins, often associated with the lead ore galena. Magnification: x500 when printed at 10 centimetres wide.

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Keywords: barium carbonate, biomineralisation, block copolymer, chemical, chemistry, coloured, composite, compound, compounds, copolymers, crystal, crystals, false-coloured, geological, geology, mineral, scanning electron micrograph, scanning electron microscope, sem, sheet, thorny, witherite

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