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Science 10 February 1967:
Vol. 155. no. 3763, pp. 686 - 687
DOI: 10.1126/science.155.3763.686
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Articles

Indium as an Impurity in Ancient Western Mexican Tin and Bronze Artifacts and in Local Tin Ore

Earle R. Caley 1 and Dudley T. Easby Jr. 2

1 Department of Chemistry, Ohio State University, Columbus 43210
2 Metropolitan Museum of Art, New York 10028

The presence of indium in a nodule of cassiterite from the State of Guerrero increases the probability that ancient tin and bronze artifacts from Guerrero, which contain indium as an impurity, were made locally from metal extracted from local tin ore.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)