# Comment on High-Pressure Behavior of Hydrogen and Deuterium at Low Temperatures

## TL;DR

This paper critically examines claims of a new solid phase of D2 at high pressure and low temperature, arguing that the data do not support the original claim based on Raman analysis and phase transition theory.

## Contribution

The paper provides a critical analysis challenging the existence of a new D2 solid phase, offering alternative interpretation of Raman data and phase transition theory.

## Key findings

- Original data does not support the new D2 phase claim
- Reinterpretation of Raman data suggests different phase behavior
- Highlights importance of rigorous data analysis in phase identification

## Abstract

X.-D. Liu et al. [Phys. Rev. Lett. 119, 065301 (2017)] report on the existence of a new unique solid phase of D2, which makes the high-pressure low-temperature behavior distinct from H2. Here, based on the analysis of their Raman data and phase transition theory, we show that the presented data do not support this claim.

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Source: https://tomesphere.com/paper/1901.05286