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Wax Crystals in Gas Oil

When cooled to a temperature below about 2oC, the waxes in
fuel oils such as this tend to crystallise out. Wax crystal size and
shape can be varied by altering the rate at which the oil is cooled.
This image illustrates the appearance of the crystals within the cooled oil.
By filtering out the oil, structural information about the crystals themselves
can be demonstrated.
Bar = 10um