Manganese compositional model

The physical description of strongly pressure dependent magnetic properties is the object of considerable study. Edwards and Bartel [74E01] have performed the more recent physical evaluation of strong pressure and composition dependence of magnetization in their work on cobalt and manganese substituted invars. Their work contrasts models based on a localized-electron model with a modified Zener model in which both localized- and itinerant-electron effects are incorporated in a unified model. Their work favors the latter model. 

The manganese content of the basal diets and of urine, feces and whole blood was measured using a Varian Techtron Atomic Absorption Spectrophotometer Model 1275. Urine samples were read directly using a graphite furnace attachment (Model GTA-95). Fecal composites were analyzed for fat content (13). Serum total cholesterol and HDL-cholesterol were enzymatically assayed (12,14). 

Model Ni/MnOx catalysts were prepared by 150-X nickel deposition onto an oxidized manganese disk under ultra-high vacuum. The surface composition of the catalyst wa-s followed as a function of time at 500 K in ultra-high vacuum. Rapid diffusion of reduced manganese oxide onto the nickel surface was observed. This oxide migration phenomenon was observed for a wide range of metal/... 

Where both cobalt and manganese are present in solution, the coprecipitation of hausmannite and C03O4 might be expected. Sinha et al. (25) found that random substitution of cobalt for Mn " or Mn could occur in such material occurrence of Co in manganese oxide crystal-lattice positions was noted by Bums (4). Apparently there are no thermodynamic data for mixed cobalt + manganese oxides, but the behavior of the ions can probably be represented over a considerable range of solid composition by a solid—solution model based on the equilibrium between the pure end members. Thus... 

In this paper preliminary results of the synthesis and characterization of model composites, consisting of Si wafers covered with thin layers of chromium, manganese and iron oxide and a silicalite-1 coating are presented. 

A) Composite diffraction pattern along the [001] zone of Au4Mn B) Schematic representation of composite diffraction pattern (open dots indicated locations of basic spots, full dots are superstructure spots) C) High-resolution image of the superstructure (on the right, a small area of basic AuaMn structure is also visible) D) Model of the one-dimensional superstructure only manganese columns are represented... 

---