Crystal garden growth

Crystal garden growth

A600/0831 Rights Managed

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This image is part of the sequence Science: chemical reaction showing growth of alum crystal garden


Caption: Crystal garden. First of five photographs showing the growth of a "crystal garden". A saturated solution of potassium aluminium sulphate (alum) is poured into the well at the base of the cardboard tree and begins to soak up through the card. The water in the solution evaporates from the surface of the card, especially at tips of the branches, and potassium aluminium sulphate crystals begin to form. The card at the tips of the branches has been impregnated with multicoloured dyes to colour the crystals, which are normally white. The crystals continue to grow for several hours, until all the water in the solution has evaporated. (See photo's A600/832 to A600/835).

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Keywords: alum, chemical, chemistry, compound, compounds, crystal garden, crystals, growth sequence, potassium alum, potassium aluminium, reaction

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