Knowledge of the electronic structure of crystalline and non-crystalline earth materials at ambient and high pressure are essential in order to understand the atomic origins of electronic, thermodynamic, and mechanical properties of these materials in the Earth’s crust as well as Earth and planetary interiors (Hemley 1998; Laudernet et al. 2004; Stixrude and Karki 2005; Mao and Mao 2007; Price 2007; Stixrude 2007). Pressure-induced changes in the electronic structure of crystalline and amorphous silicates and oxides (glasses and melts) with low-z elements (e.g., Si, O, B, Li, C, etc.) have implications for...

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