Dynamic compression results are reported for single-crystal forsteritc loaded along the orthorhombic a and c axes to pressures from 130 to 165 GPa. Hugoniot states for the two axes are well described by a single curve offset to densities 0.15-0.20 g/cm 3 lower than earlier data for single-crystal forsteritc shocked along the b axis above 100 GPa. Earlier data of Syono et al. [ 1981a] show margi...

Time resolved electron paramagnetic resonance ~EPR! measurements on a photoexcited chromium doped forsterite ~Cr:Fo! single crystal are reported. The spectral changes with time, magnetic field, crystal orientation, microwave power and, in particular, photoexciting wavelength, provide a selective picture of the various chromium dopants and the absorption–relaxation cycle associated with each opt...

We present mid-infrared spectral mapping observations of the core-collapse supernova remnant 1E 0102.2−7219 in the Small Magellanic Cloud using the InfraRed Spectrograph (IRS) on the Spitzer Space Telescope. The remnant shows emission from fine structure transitions of neon and oxygen as well as continuum emission from dust. Comparison of the mid-IR dust emission with observations at x-ray, rad...

Using a Michelson white-light interferometer, we measure the group-delay dispersion and third-order dispersion coefficients, d2(phi)/d(omega)2 and d3(phi)/d(omega)3, of chromium-doped forsterite (Cr:Mg2SiO4) over wavelengths of 1050-1600 nm for light polarized along both the c and b crystal axes. In this interval, the second-order dispersion for the c axis ranges from 35 fs2/mm to -14 fs2/mm, a...

Pressure-volume X-ray diffraction data were collected at eight pressures to 17.2 GPa for synthetic single-crystal forsterite, Mg2Si04. Birch-Murnaghan equation-of-state parameters were determined to be Ko = 125(2) GPa and K~ = 4.0(4). To ensure hydrostatic conditions, we monitored the diffraction-peak shapes while the sample was in different pressure media: 4:1 methanol-ethanol, He, and Ar. The...

A body of dolomite marble near Chotěboř was found in migmatized biotite paragneiss the Moldanubicum directly on border with migmatites/orthogneisses Kutná Hora Crystalline Complex. The area underwent significant tectonic reworking rocks along Přibyslav mylonite zone. Therefore, only small relics early prograde HT/LP metamorphism at T > 650 - 700 °C were preserved this marble. They are repres...

Vibrational and thermodynamic properties of forsterite at mantle conditions Li Li , Renata M. Wentzcovitch, Donald J. Weidner, Cesar R. S. Da Silva 1. Department of Geosciences, Mineral Physics Institute, Stony Brook University, Stony Brook, NY, 11790, USA 2. Department of Chemical Engineering and Materials Science, Minnesota Supercomputing Institute for Digital Technology and Advanced Computat...