The Mg/2+/-Fe/2+/ order-disorder and the thermodynamics of the orthopyroxene, /Mg,Fe/2Si2O6 crystalline solution. Part 1 - A Fe 57 Moessbauer resonance study of the Mg/2+/-Fe/2+/ distribution in orthopyroxenes at 500, 600, 700 and 800 C

Iron 57 Mossbauer resonance determination of distribution isotherms for bibalent Mg and Fe ions between M1 and M2 sites in orthopyroxene

On the uniqueness of paths for spin-0 and spin-1 quantum mechanics

The uniqueness of the Bohmian particle interpretation of the Kemmer equation, which describes massive spin-0 and spin-1 particles, is discussed. Recently the same problem for spin-1/2 was dealt with by Holland. It appears that the uniqueness of boson paths can be enforced under well determined conditions. This in turn fixes the nonrelativistic particle equations of the nonrelativistic Schrodinger equation, which appear to correspond with the original definitions given by de Broglie and Bohm only in the spin-0 case. Similar to the spin-1/2 case, there appears an additional spin-dependent term in the guidance equation in the spin-1 case. We also discuss the ambiguity associated with the introduction of an electromagnetic coupling in the Kemmer theory. We argue that when the minimal coupling is correctly introduced, then the current constructed from the energy-momentum tensor is no longer conserved. Hence this current can not serve as a particle probability four-vector.Comment: 19 pages, no figures, LaTex, shortened version for Phys. Lett.

Thermodynamic behavior of trivalent gallium, aluminum and iron distributions in garnets

Data on distribution of ions of gallium, aluminum, and iron among tetrahedral and octahedral sites in garnet

A first experimental test of de Broglie-Bohm theory against standard quantum mechanics

De Broglie - Bohm (dBB) theory is a deterministic theory, built for reproducing almost all Quantum Mechanics (QM) predictions, where position plays the role of a hidden variable. It was recently shown that different coincidence patterns are predicted by QM and dBB when a double slit experiment is realised under specific conditions and, therefore, an experiment can test the two theories. In this letter we present the first realisation of such a double slit experiment by using correlated photons produced in type I Parametric Down Conversion. Our results confirm QM contradicting dBB predictions

Recent trends in refractory practices in reheating and heat treatment furnaces

It is indeed a pleasure and a privilege to speak to such, a distinguished audience. Having worked for a number of years on both sides of the fence, albeit imaginary, of refractory application and manufacture it is a pleasure for me to see both the groups together In this seminar. Proper co-ordination and co-operation among the refractory manufacturers would make the efforts to achieve better results in the field of refractories easier and quicker. My personal experience In switching sides has been extremely enlightening to comprehend the entire gamut of refractory technology. Of course the tendency on my part to perce-ptibly increase in physical dimension in latter years, would have made walking in and out of hot furnaces rather inconvenient.Hence possibly the switchover has proved to be advantageous-personally. However if frank and free dis-cussions amongst the different groups lead to better understandings, coordinations and cooperations, then I would be amply rewarded in sharing some of my thoughts on the subject