A lattice-dynamical treatment of displacive phase transitions leads naturally to the softmode
model, in which the phase-transition mechanism involves a phonon frequency that falls to …

Laser micro-Raman spectroscopy has been used to study 20 of the most commonly
occurring sulphides (ie iron sulphides, copper sulphides and some sulphosalts) which cover …

To date, only five natural carbonate minerals of calcite structure have been studied by
Raman spectroscopy. These include calcite (CaCO3), magnesite (MgCO3), siderite …

The room-temperature Raman spectra of aragonite, magnesite and dolomite have been
recorded up to 30 GPa and 25 GPa, respectively and no phase changes were observed …

Carbonate minerals may be recycled into the mantle at subduction zones. However, the
evolution of carbonate minerals in equilibrium with aqueous fluids as well as the nature of …

Phase transitions in calcite, a naturally occurring crystalline form of CaCO3, have been
investigated by three different experimental techniques:(1) in-situ X-ray diffraction (XRD) …

This paper reviews the inelastic-neutron-scattering measurements and theoretical lattice-
dynamics calculations, which have aimed at providing a microscopic understanding of the …

Calcite, CaCO3, undergoes several high pressure phase transitions. We report here the
crystal structure determination of the CaCO3-III and CaCO3-VI high-pressure polymorphs …

Raman spectroscopy was used to distinguish the individual members of the two feldspar
subgroups. All feldspars were found to exhibit a characteristic, intense line between 500 and …

Calcite, CaCO3, is a common carbon-bearing mineral found on the Earth's surface. As
carbon dioxide in the atmosphere can be sequestered in carbon-bearing minerals …