Publications

Chopelas A, Nicol MF (1982) Pressure dependence to 100 kbar of the phonons of MgO at 90 and 295 K. J Geophys Res 87: 8591‑8597

Chopelas A, Nicol MF (1982) Pressure dependence to 100 kbar of MgO phonons, in High Pressure in Research and Industry, Backman C-M, Johannisson T, Tegner L, eds., Institute of Physical Chemistry, Uppsala.

Chopelas A, Boehler R (1984) MgO:V2+ pressure scale for diamond anvil cells. Mat Res Soc Symp Proc 22: 275‑280

Chopelas A, Boehler R (1989) Thermal expansion measurements at very high pressure, systematics, and a case for a chemically homogeneous mantle. Geophys Res Lett 16: 1347‑1350

Chopelas A (1990) Thermal expansion, heat capacity, and entropy of MgO at mantle pressures. Phys Chem Minerals 17: 142‑148

Chopelas A (1990) Thermal properties of forsterite at mantle pressures derived from vibrational spectroscopy. Phys Chem Minerals 17: 149‑157

Chopelas A (1990) Thermal properties of solids at high pressures from vibrational spectroscopy: MgO and MgAl2O4. High Pressure Research 5: 711‑713

Boehler R, von Bargen N, Chopelas A (1990) Melting, thermal expansion, and phase transitions of iron at high pressures. J Geophys Res 95: 21731‑21736

Anderson OL, Chopelas A, Boehler R (1990) Thermal expansivity versus pressure at constant temperature: a re-examination.  Geophys Res Lett 17:685-688

Chopelas A (1991) Thermal properties of β‑Mg2SiO4 at mantle pressures derived from vibrational spectroscopy: Implications for the mantle at 400 km depth. J Geophys Res 96: 11817‑11829

Chopelas A (1991) Single crystal Raman spectra of forsterite, fayalite, and monticellite. Am Mineral 76:1101-1109

Chopelas A, Hofmeister AM (1991) Vibrational spectroscopy of aluminate spinels at 1 atm and of MgAl2O4 to over 200 kbar. Phys Chem Minerals 18: 279‑293

Hofmeister AM, Chopelas A (1991) Thermodynamic properties of pyrope and grossular from vibrational spectroscopy. Am Mineral 76: 880‑891

Hofmeister AM, Chopelas A (1991) Vibrational spectroscopy of end‑member silicate garnets. Phys Chem Minerals 17: 503‑526

Boehler R, Chopelas A (1991) A new approach to laser heating in high pressure mineral physics. Geophys Res Lett 18: 1147‑1150

Chopelas A, Boehler R (1992) Raman spectroscopy of high pressure MgSiO3 phases synthesized in a CO2 laser heated diamond anvil cell. High Pressure Research: Application to Earth and Planetary Science. Syono Y, Manghnani M, (eds) Terrapub, Tokyo. pp 101‑108

Chopelas A, Boehler R (1992) Thermal expansivity in the lower mantle. Geophys Res Lett 19: 1983‑1986

Boehler R, Chopelas A (1992) Phase transitions in a 500 kbar ‑ 3000 K gas apparatus. High ‑ Pressure Research: Application to Earth and Planetary Sciences. Syono Y, Manghnani MH, (eds) Terra Scientific Publishing Company, Tokyo. pp 55‑60

Angel RJ, Chopelas A, Ross NL (1992) Stability of high-density clinoenstatite at upper-mantle pressures. Nature 358: 322-324

Chopelas A (1992) Sound velocities of MgO to very high compression. Earth Planet Sci Lett 114: 195‑192

Yuen DA, Cadek O, Chopelas A, Matyska C (1993) Geophysical inferences of thermal ‑ chemical structures in the lower mantle. Geophys Res Lett 20: 889‑902

Anderson OL, Oda H, Chopelas A, Isaak DG (1993) A thermodynamic theory of the Grüneisen ratio at extreme conditions: MgO as an example. Phys Chem Minerals 19:369-380

Zhang L, Chopelas A (1994) Sound velocity of Al2O3 to 616 kbar. Phys Earth Planet Inter 87: 77‑83

Cadek O, Yuen DA, Steinbach V, Chopelas A, Matyska C (1994) Lower‑mantle thermal structure deduced from seismic tomography, mineral physics and numerical modelling. Earth Planet Sci Lett 121: 385‑402

Chopelas A, Boehler R, Ko J (1994) Thermodynamics and Behavior of γ‑Mg2SiO4 at high pressure: Implications for Mg2SiO4 phase equilibrium. Phys Chem Minerals 21: 351‑359

Boehler R, Chopelas A, Zerr A (1995) Temperature and chemistry of the core‑mantle boundary. Chem Geol 120:199-205

Chopelas A (1996) The fluorescence sideband method for obtaining acoustic velocities at high compressions: application to MgO and MgAl2O4. Phys Chem Minerals 23:25-37

Chopelas A, Reichmann HJ, Zhang L (1996) Sound velocities of five minerals to mantle pressures determined by the sideband fluorescence method. Geochemical Society Special Publication No. 5: Mineral Spectroscopy: A Tribute to Roger G. Burns, Dyar MD, McCammon C, Schaefer MW, eds, pp. 229-242

Chopelas A (1996) Thermal expansivity of lower mantle phases MgO and MgSiO3 perovskite at high pressure derived from vibrational spectroscopy. Phys Earth Planet Inter 98:3-15

Hugh-Jones D, Chopelas A, Angel R (1997) Tetrahedral compression in (Mg,Fe)SiO3 orthopyroxenes. Phys. Chem Minerals 24:301-310.

Serghiou G, Zerr A, Chopelas A. (1998) Phase transitions and disordering of CaSiO3 under pressure, Rev High Pressure Sci Technol 7:359-361

Serghiou G, Zerr A, Chopelas A, Boehler R (1998) The transition of pyrope to perovskite. Phys Chem Minerals 25:193-196

Chopelas A (1999) Estimates of mantle relevant Clapeyron slopes in the MgSiO3 system from high pressure spectroscopic data. Am Mineral, 84:233-245

Chopelas A (2000) Thermal expansivity of mantle relevant magnesium silicates from vibrational spectroscopy at high pressures, American Mineralogist, 85:270-278

Serghiou G, Chopelas A, Boehler R (2000) Explanation of pressure induced transformations in chain silicates based on their modular structures, J Phys: Cond Matter,12:8939-8952.

Serghiou G, Boehler R, Chopelas A (2000) Reversible coordination changes in crystalline silicates at high pressure and ambient temperature J. Phys.: Condens. Matter 12: 849-857

Chopelas A, Serghiou G (2002) Spectroscopic evidence for pressure-induced phase
transitions in diopside, Phys Chem Minerals, 29: 403 -408

G. Serghiou, A. Chopelas, R. Boehler (2003); “Four to sixfold coordination changes in crystalline silicates at high pressure”, Journal of High Pressure Research 23: 45-53

G. Serghiou, A. Chopelas, R. Boehler (2004) “The Role of Medium Range Order in Phase Transitions in Chain Silicates Upon Compression”, Journal of Physics: Condensed Matter 16: S1255-S1261

Chopelas, A. (2005) Single Crystal Raman Spectroscopy on Uvarovite (Ca3Cr2Si3O12). Physics and Chemistry of Minerals,

Chopelas A (2006) Modeling the thermodynamic parameters of the six endmember garnets at ambient and high pressures from vibrational data. Physics and Chemistry of Minerals 33:363-376

Evans BE, Kuehner SM, Chopelas A (2009) Magnetite-free, yellow lizardite serpentinization of olivine websterite, Canyon Mountain complex, N.E. Oregon, Am Mineralogist, 94:1731-1734

Chopelas A (2011) Single-crystal Raman spectra of YAlO3 and GdAlO3: comparison to several orthorhombic ABO3 perovskites. Phys Chem Miner:DOI 10.1007/s00269-00011-00444-00261

Submitted.

Zuidweg, M.; Chopelas, A,Effect of Compositional Variation on the Raman Spectrum Across the Tremolite-Ferroactinolite Join, Submitted.

In Preparation

A Chopelas (2011) Thermodynamic properties of Perovskites from Single crystal spectra at high pressures

Chopelas, A. Single Crystal Raman Spectra of Garnet Solid Solutions along the Pyrope-Almandine Binary.

Chopelas, A. Single Crystal Raman Spectra of Garnet Solid Solutions along the Grossular-Andradite Binary.