The scientist we are looking for this time is considered one of the founders of modern geochemistry. They developed a classification of chemical elements based on the elements’ affinity for different host phases in the layers of the Earth, as well as an indicator for the stability and distortion of crystal structures.

Our chemist was named after a friend of their father’s—a German chemist who, among other contributions, discovered thiophene.

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• The Guess the Chemist answer was published on March 20, 2022.
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