Magnetite computation

In Figure 2, the MCssbauer spectrum of sample 2 (Table I) and a matching computer-simulated model spectrum are shown. This spectrum was recorded over a period of 30 hours while sample 2 was under a flowing CO/CO2 (15 85) gas mixture at 613 K. Following the completion of the experiment, the average magnetite particle... 

Magnetite is the ancient lodestone used as an early compass. More recently, ferrites have found use as memory devices in computers, as magnetic particles on recording tapes and as transformer cores. 

Chamritski I, Bums G (2005) Infrared- and Raman-active phonons of magnetite, mghemite, and hematite, a computer simulation and spectroscopic study. J Phys Chem B 109 4965-4968... 

Pacific Rise (solid squares) and Juan de Fuca (solid circles) hydrothermal vent solution samples (10.11). Pathways from analog stockwork alteration computational models (after Janecky and Shanks ( )) are shown as lines starting from small solid circle symbols. Solid lines represent reaction paths with an initial H2S concentration in hydrothermal solution of 6.5 mM. Dashed lines represent reaction pathways calculated using hydrothermal solution composition of 8.5 mM H2S. Hydrothermal solution reaction pathways illustrated are (1) anhydrite+fayalite reactants with suppression of magnetite and all silica polymorphs and (2) anhydrite+fayalite reactants with magnetite precipitation allowed and suppression of all silica polymorphs. Restriction of the solution H2S and data to within... 

Fig. 1. Vitrinite reflectance measured on lignite B as a function of experimental run duration at 200°C, 2.0 kbar aqueous fluid pressure, with t02 defined by the hematite-magnetite and magnetite + quartz-fayalite solid buffers (data from Table 1 and Appendix A). The laboratory rate curve is visually estimated the approximate quasi-threshold value for %R is 0.54. Also illustrated in the computed EASY%Ro model for vitrinite maturation at 200°C. EASY%Rq rate model curves agree with experimentally determined rates for the 250 and 300°C isotherms, but are low for the 200°C and slightly high for the 400 0 runs (J. J. Sweeney, personal communication, 01/10/03).

The stabilization mechanisms of diversely stabilized magnetite particles in aqueous carriers are now described in detail. For the calculation a special computer software [17] was used The dimensionsless individual energies VIkT and the superposition of these energies were calculated as functions of particle distance d. 

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