Conformation of hydrogen in deep earth

摘要

Hydrogen is the simplest atom and the most abundant element in the universe. Molecular hydrogen is a common form of hydrogen. The phase transition of molecular hydrogen at the ultrahigh pressure is the subject of great theoretical and experimental interest in the 1980's. However, whether there exists molecular hydrogen in deep earth is an important problem. This paper presents our recent results. We have found the peaks of molecular hydrogen (?) by Raman spectroscopy in diamonds from Liaoning and Hunan Provinces following the discovery of potassium-, sodium- and copper-bearing chloride inclusions in diamonds. These diamonds have not any fractures. The characteristics of these diamond samples and their Raman spectral peaks are shown in table 1 and figure 1.