Carl Plattner und Caesium Person-Info 

( Ich bin Carl Plattner)
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What is the Softest Metal? A Guide on Properties and UsesYijin Hardware

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— The traces of history with Caesium date back to the year 1800, specifically 1846, by a man named Carl Plattner. He investigated the mineral — The traces of history with Caesium date back to the year 1800, specifically 1846, by a man named Carl Plattner. He investigated the mineral ...
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