Enrico Clerici

Enrico Clerici (15 October 1862 – 26 August 1938) was an Italian mineralogist and geologist. From 1903 on he worked at the University of Rome. He published in 1907 the composition of a solution with a density of 4.25 g/cm³ at 20 °C, to determine the density of minerals. The Clerici solution is a mixture of thallium formate (Tl(CHO₂)) and thallium malonate (Tl(C₃H₃O₄)) in water.^{[1] [2]}

References

1. E. Clerici (1907). "Preparazione di liquidi per la separazione dei minerali". Atti della Reale Accademia Nazionale dei Lincei: Memorie della Classe di Scienze Fisiche, Matematiche e Naturale (in Italian). 16: 187.
2. ".". The Mineralogical magazine and journal of the Mineralogical Society. 28: 188. 1949.