Moggi-Cecchi, G.Pratesi, I.A. Franchi, R.C. Greenwood, Museo di Scienze Planetarie, Via Galcianese 20/h, I59100 Prato, Italy, e-mail: [email protected], Dipartimento di Scienze della Terra dell'Università degli Studi di Firenze, Via G.La Pira 4, I-50123 Firenze, Italy, e-mail: [email protected], Planetary and Space Sciences Research Institute, The Open University, Walton Hall, Milton Ke...

CHONDRITE PARTIAL MELT RESIDUE. M. Humayun, K. Keil and A. Bischoff, National High Magnetic Field Laboratory & Dept. of Geological Sciences, Florida State University, Tallahassee, FL 32310, USA ([email protected]), Hawai’i Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawai’i at Manoa, Honolulu, Hawai’i 96822, USA ([email protected])...

Introduction Orthopyroxene is an important mineralogical constituent of petrological models of the Earth’s upper mantle. Therefore, the reconstructive (or first-order) phase transformation between orthoenstatite (OEN, orthorhombic symmetry, space group Pbca) and highpressure clinoenstatite (HP-CEN, monoclinic symmetry, space group C2/c) is of great interest for geophysical applications. In part...