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32.5 x 32.5 cm ⏐ 12.8 x 12.8 in (300dpi)
SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Ruthenium. Samples of the element Ruthenium (Ru). Ruthenium is a hard, white transition metal in the platinum group. Ruthenium is mainly used as an alloy with platinum and palladium to make electrical contacts.
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