Phase transformations in feldspar group minerals with paracelsian topology under high temperature and high pressure
LA Gorelova - Russian Geology and Geophysics, 2023 - pubs.geoscienceworld.org
Feldspar group minerals (feldspars) form up to 60 vol.% of the Earth's crust. The knowledge
of their stability under extreme conditions (high-pressure and high-temperature) allow to …
of their stability under extreme conditions (high-pressure and high-temperature) allow to …
High-pressure crystal chemistry
CT Prewitt, RT Downs - Reviews in mineralogy, 1998 - degruyter.com
The response of earth materials to increasing pressures and temperatures is an area of
research that is of interest to many investigators in geochemistry and geophysics. There …
research that is of interest to many investigators in geochemistry and geophysics. There …
Structural stability of silica at high pressures and temperatures
The high-pressure phase diagram of Si O 2 has been calculated using density-functional
perturbation theory. We find that phase transitions of silica do not correspond to any …
perturbation theory. We find that phase transitions of silica do not correspond to any …
Formation and structure of a dense octahedral glass
We have performed in situ x-ray and neutron-diffraction measurements, and molecular
dynamics simulations, of G e O 2, an archetypal network-forming glass under pressure …
dynamics simulations, of G e O 2, an archetypal network-forming glass under pressure …
Mechanical strength and coordination defects in compressed silica glass: Molecular dynamics simulations
Contrary to ordinary solids, which are normally known to harden by compression, the
compressibility of Si O 2 (silica) glass has a maximum at about 2–4 GPa and its mechanical …
compressibility of Si O 2 (silica) glass has a maximum at about 2–4 GPa and its mechanical …
Anatomy of black veins in Zagami: clues to the formation of high-pressure phases
F Langenhorst, JP Poirier - Earth and Planetary Science Letters, 2000 - Elsevier
Black melt veins in the Martian basaltic meteorite Zagami were investigated using analytical
transmission electron microscopy, with the goal to constrain the mechanisms and PTt …
transmission electron microscopy, with the goal to constrain the mechanisms and PTt …
Local Defect Structures and Ion Transport Mechanisms in the Oxygen-Excess Apatite La9.67(SiO4)6O2.5
Apatite-type oxides of general formula La9. 33+ x (SiO4) 6O2+ 3 x/2 have been attracting
considerable interest recently because of their observed high oxide-ion conductivity and …
considerable interest recently because of their observed high oxide-ion conductivity and …
The stability and P–V–T equation of state of CaSiO3 perovskite in the Earth's lower mantle
Energy dispersive X‐ray diffraction measurements for polycrystalline CaSiO3 perovskite
were carried out at in situ transition zone and lower mantle P‐T conditions (P= 18–96 GPa …
were carried out at in situ transition zone and lower mantle P‐T conditions (P= 18–96 GPa …
Mixed alkali systems: structure and 29Si MASNMR of Li2Si2O5 and K2Si2O5
B De Jong, HTJ Supèr, AL Spek… - … Section B: Structural …, 1998 - journals.iucr.org
Li2Si2O5, Mr= 150.05, λ (Mo Kα)= 0.71073 Å, 293 K, orthorhombic, Ccc2, a= 5.807 (2), b=
14.582 (7), c= 4.773 (3) Å, V= 404.2 (3) Å3, μ (Mo Kα)= 0.78 mm− 1, Z= 4, Dx= 2.466 Mg m …
14.582 (7), c= 4.773 (3) Å, V= 404.2 (3) Å3, μ (Mo Kα)= 0.78 mm− 1, Z= 4, Dx= 2.466 Mg m …
Charge distribution as a tool to investigate structural details. II. Extension to hydrogen bonds, distorted and hetero-ligand polyhedra
M Nespolo, G Ferraris, G Ivaldi… - … Section B: Structural …, 2001 - journals.iucr.org
It is shown that one of the main reasons for most failures of the methods for calculating
distance-dependent bond strengths is related to the distortion of the coordination polyhedra …
distance-dependent bond strengths is related to the distortion of the coordination polyhedra …