Molybdenum Mo

The most sensitive technique for solution analysis is cold vapor AAS or AFS using collection of the mercury vapor on a gold trap or directly in the graphite tube, treated with a permanent modifier. 

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Molybdenum (Mo) and copper (Cu) were used quite frequently also. 

Micronutrient An element required by plants and bacteria, in proportionately smaller amounts, for survival and growth. Micronutrients include Iron (Fe), Managanese (MN), Zinc (Zn), Boron (B), and Molybdenum (Mo). 

Fig. 6.1 The fundamental structural unit found in the Chevrel phases (cluster MoeXg full circles Mo atoms) displayed in three ways to emphasize different views of the connectivity. In (a) an octahedron of molybdenums (Mo-Mo = 2.7 A) is encased in a cube of chalcogens (Mo-S 2.45 or Mo-Se 2.6 A). Scheme (b) exhibits the same cluster as consisting of an octahedron with its triangular faces capped by chalcogenides. In (c), the cluster has been reoriented so that a threefold axis is vertical. (Reproduced from [10])...

As mentioned above, some chemistry of a few heavier elements is also of concern in the development of the geosphere and of living systems as we shall see later. A striking case is the chemistry of molybdenum (Mo) and tungsten (W), which we take here with vanadium (V). The first two elements are in the second and third series of transition metals and all three are found in higher combining ratios and with a greater preference for S rather than O, W less so than Mo (the... 

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