Knowra Mineral physics Mineral physics Mineral physics studies minerals’ physical and chemical properties, especially under the high pressures and temperatures found inside planets. It connects laboratory measurements and theory to planetary structure and behavior.
Mineral phase transition : A change in a mineral’s crystal structure or state as conditions such as pressure, temperature, or composition vary. Phase changes in deep minerals alter density, elasticity, and planetary interior boundaries.
Crystallography : The study of crystal structures and how their atomic arrangements determine symmetry and properties. Crystal symmetry underlies the structures and directional properties measured in minerals.
Earth's lower mantle : The deep rocky layer extending from about 660 kilometers to the boundary with Earth's core. Its dominant minerals are studied at pressures and temperatures inaccessible at the surface.
Francis Birch : An American geophysicist who developed foundational high-pressure studies of Earth materials. His measurements linked mineral properties at high pressure to seismic interpretations of Earth's interior.
Equation of state : A relation connecting a material’s pressure, volume, and temperature or internal energy. Equations of state translate mineral measurements into density profiles for planetary interiors.
Crystal structure : The repeating three-dimensional arrangement of atoms, ions, or molecules in a crystalline solid. Mineral behavior depends on how atoms are arranged and bonded in crystals.
Earth's core : Earth’s central metallic region, consisting of a liquid outer core and a solid inner core. Mineral-physics constraints help evaluate the composition and physical state of core materials.
Percy Bridgman : An American physicist known for experimental research on matter under high pressure. His high-pressure techniques helped make laboratory studies of deep-Earth materials possible.
Seismic anisotropy : The dependence of seismic-wave speed on the direction in which waves travel through a material. Crystallographic alignment in mantle minerals can produce directional seismic speeds.
Mineral chemistry : The study of the chemical composition and elemental substitutions in minerals. Substitution among elements changes mineral stability, density, and elastic properties.
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