1. High Pressure Physics Centre of the Polish Academy of Science, Sokolowska 29/37, Warsaw, Poland
2. National Research & Development Institute for Non-ferrous and Rare Metals, 102 Biruintei Blvd, Pantelimon, Ilfov, Romania
3. National Institute for the Research & Development of Isotopic and Molecular Technology, 65-103 Donath Str. Cluj-Napoca, Romania