Mineralogical Applications of Crystal Field Theory, Second by Roger G. Burns PDF

By Roger G. Burns

ISBN-10: 0511524897

ISBN-13: 9780511524899

ISBN-10: 0521017858

ISBN-13: 9780521017855

ISBN-10: 0521430771

ISBN-13: 9780521430777

The hot variation of this landmark quantity takes under consideration the mammoth volume of recent spectral info on minerals, and describes quite a few functions of crystal box conception to the earth and planetary sciences. a different viewpoint of the second one version is that it highlights the houses of minerals that lead them to compounds of curiosity to strong kingdom chemists and physicists.

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Extra resources for Mineralogical Applications of Crystal Field Theory, Second edition (Cambridge Topics in Mineral Physics and Chemistry)

Example text

Thus, d and s orbitals are said to have the same parity. However, d orbitals (g) and/? orbitals (w) have opposite parities. Also, the plus and minus signs associated with the orbitals illustrated in fig. 2 refer to the mathematical signs of the wave functions. The electron density is always positive, however, and is obtained by squaring a wave function. Sometimes, an alternative designation is used for the two groups of d orbitals, namely de and dyfor the eg and t2g orbitals, respectively. , shells.

6), which is a measure of the degree of covalent bonding. Transition metal ions with 3d4 to 3d7 configurations in coordination with ligands at the beginning of the spectrochemical series generally have high-spin configurations, whereas low-spin states exist in complexes with ligands at the end of the series. Thus, fluoride compounds of the first transition series contain cations in high-spin states, whereas low-spin states exist in cyanide complexes. The crossover point from high-spin to low-spin configuration varies from one cation to another, and may be ascertained from magnetic susceptibility measurements, interatomic distances in crystal structure refinements and information from spectroscopic techniques such as X-ray photoelectron (XPS), X-ray absorption (EXAFS, XANES) and Mossbauer spectroscopies.

The quantum number ml occurs in solutions to both the 0(9) and disfunctions of the Schrodinger equation and can take all integral values from +/ to —/, or (2/ + 1) values in all. For example, for a given principal quantum number n and with / = 0, there is only one possible orbital, namely one with ml = 0. Thus, there is only one s orbital associated with each principal quantum shell. , orbitals. For a given n and with 1=1, there are three possible values for raz: - 1 , 0 and +1. , orbitals. Similarly, there are five different d orbitals, since / = 2 and ml can take the values 2, 1,0, - 1 , and - 2 .

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Mineralogical Applications of Crystal Field Theory, Second edition (Cambridge Topics in Mineral Physics and Chemistry) by Roger G. Burns


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