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Electron Microscopy Sciences Duplex Reference Specimen
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Catalog No. 5024818
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An alternative and very sensitive test is by means of an alloy with two major Copper/Zinc phases separated by an atomic number difference of 0.1. The light phase illustrated in the micrograph has a mean atomic number of 29.47 and the dark phase a mean atomic number of 29.37.

Catalog No. 50-248-18 Supplier Electron Microscopy Sciences Supplier No. 7952101
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An alternative and very sensitive test is by means of an alloy with two major Copper/Zinc phases separated by an atomic number difference of 0.1. The light phase illustrated in the micrograph has a mean atomic number of 29.47 and the dark phase a mean atomic number of 29.37.

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