Energy levels of d1 and d9 ions in chemically significant symmetry sites

Kassman, Allen J.

doi:10.1021/ed051p605

Cited by 2 publications

(5 citation statements)

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“…The energy of the three levels A; (dz2), E' (dxy, d r 2 -y2), and E" (dxz, dyz) can be expressed as a function of the angle p between the metal-oxygen bonds and the direction perpendicular to the base of the triangular prism, and of two radial integrals x2 and a4 [19]. Usually, cy takes values between 1 and 2 [ 181.…”

Section: Localization Of Cu2+ In the B-alumina Latticementioning

confidence: 99%

EPR study of Cu2± ions in the conduction planes, of Na, Tl, and Ag ß-aluminas

Gourier

Antoine

Vivien

et al. 1977

Phys. Stat. Sol. (a)

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ESR studies are performed on single crystals of copper doped Na, TI, and Ag p-aluminas. When Cu2+ is introduced by ionic exchange for a few minutes in a molten CuCI-2yo CuCI, mixture, at 900 I<, the cupric ions lie in the conduction planes, and not in the spinel blocks of the superionic conductors. Cu2+ replace Na+ or TI+ in the axial BR and mO sites, and Agf in the 6h (or mO) positions. However Cu2+ never occupies the aBR position, although the aBR site is partially occupied by the conducting cation, specially for Ag p-alumina. The variation of the spin Hamiltonian parameters with the nature of the conducting cation, and witi: temperature is discussed. L'Btude R P E des alumnes p au sodium, au thallium et Q l'argent doppkes a u cuivre a ktB rBalisBe sur monocristaux. Lorsque les ions dopant Cu2+ sont introduits par un Bchange ionique de quelques minutes dans un mklange C~C1-27~ CuCI, fondu Q 900 K, ils se localisent dans les plans de conduction et non dans les blocs spinelle de ces composks. substitue N a + ou T1+ sur leurs sites axiaux BR et mO, et Ag' sur les positions 6h ou mO. Par contre CuZt ne se place jamais en position aBR, bien que celle ci soit partiellement occupke par le cation conducteur, notamment pour I'alumine p z i I'argent. La variation des parametres de I'hamiltonien cle spin de l'ion Cu2+ avec la nature du cation conducteur, et la tempkrature est discutke.

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Section: Localization Of Cu2+ In the B-alumina Latticementioning

confidence: 99%

EPR study of Cu2± ions in the conduction planes, of Na, Tl, and Ag ß-aluminas

Gourier

Antoine

Vivien

et al. 1977

Phys. Stat. Sol. (a)

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“…In Figures [3][4][5][6][7][8][9][10][11][12][13] we picture 11 other complexes derived from that in Figure 2 by substitution or removal of ligands. For all of these the d1 energies are given exactly by eqn.…”

mentioning

confidence: 99%

“…ments such as (+ljVj-1) or {0|l/]2} are zero and only those in eqn. (10) contribute to many-electron energies.…”

mentioning

confidence: 99%

“…With eqn. (10), tetragonal d2 energies may be easily derived from weak field octahedral wavefunctions such as those given by Ballhausen (7) and reproduced in Table 3. We illustrate this briefly with a simple example.…”

mentioning

confidence: 99%

“…Matrix elements for all diagonal and off-diagonal terms may be derived by the simple method illustrated above, using eqn. (10) and the fact that only integrals of the type <(3F,Ml)| V|(3P,Ml'))…”

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confidence: 99%

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