We show that self-assembly of germania nanoparticles in basic aqueous solutions occurs at a critical aggregation concentration CAC corresponding to the OH molar ratio. A combination of SAXS measurements of pH, conductivity and small angle X-ray scattering was used to monitor the effect of incremental additions of. Through a series of high-pressure X-ray diffraction experiments combined with in situ laser heating, we explore the pressure-temperature phase diagram of germanium Ge at pressures up to GPa and temperatures K. In the pressure range - we observe an orthorhombic transformation Ge-IV, FA Trumbore, “Solid Solution of Impurity Elements in Germanium and Silicon”, “Thermodynamic Properties of Liquid Solutions of the Ge-Mn System. Alloy Phase Diagrams, 10 4, 313 1989. Equi Diagram, Google Scholar Journal Article