Optical Properties of Actinide and Lanthanide Ions

Hessler, Jan P.; Carnall, W. T.

doi:10.1021/bk-1980-0131.ch017

Cited by 22 publications

(19 citation statements)

References 7 publications

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“…Of direct interest is the contrast in the values of the crystal-field parameters for Bk 3 + with those of Am 3 + There is a break in the regular progression, particularly in the values of B and B . The break indicated for B 6 can be attributed to a larger than average (for the series) value for Am 3 + with a more series consistent value for Bk3+. The value of B is, within the stated error, similar for the two ions.…”

Section: Bkcl3lk3+:lacl3mentioning

confidence: 89%

“…HCI (2) and HCI(3) represent two and three body interactions introduced to account for the effects of configuration interaction. The two-body operators are parameterized by a, , and y, while the three body parameters are T (k = 2, 3,4,6,7,8).…”

Section: H= Hf+hcfmentioning

confidence: 99%

“…Very sharp band spectra are characteristic of Am 3 + (4f 6 ). The J=0 (p=0) ground state is separated from the first excited state by -2750 cm~1 , so there are no temperature dependent electric or magnetic dipole transitions from thermally populated excited states.…”

Section: Am3+: Lacl 3 /Amcmentioning

confidence: 99%

“…There is a break at Gd3+ (4f7) in the smooth variation of crystal-field parameters over the series, both for Ln3+:LaF 3 and Ln3:LaCl 3 ' but Eu3+ (4f6) was found to be a typical member of the lighter half of the series with crystal-field parameters similar to those for 4f 5 (Sm3+). This suggested that it might have been a mistake to have interpolated parameters for Am3+ between those for Pu 3 + and Cm 3 +; the crystal-field parameters for Pu 3 + would be expected to provide a better approximation of the splitting in Am3+ Comparison of the Centers of Gravity ot 6 LIte Leve Comgrising the Ground Term Multiplets for Eu 3 + (4f ) and Am (5f ).…”

Section: Am3+: Lacl 3 /Amcmentioning

confidence: 99%

“…These differences arise because the values for the Fk are somewhat larger for the aquo ion spectrum than for An3+:LaC 3. Analyses of the intensities of transitions in the spectra of Bk 3 +(aquo) 44 and Es 3 +(aquo) 2 8 have also been published, and characteristic values of PEXPT lie in the range 1-100x10 6 .…”

Section: Gd3+3mentioning

confidence: 99%

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A systematic analysis of the spectra of trivalent actinide chlorides in D3h site symmetry

Carnall

1992

The Journal of Chemical Physics

144

130

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The optical spectra of actinide ions in the compound AnCl3 and doped into single-crystal LaCl3 were interpreted in terms of transitions within 5fN configurations. Energy-level calculations were carried out using an effective-operator Hamiltonian, the parameters of which were determined by fitting experimental data. Atomic and crystal-field matrices were diagonalized simultaneously assuming an approximate D3h site symmetry. Spectroscopic data were taken from the literature but in most cases supplemented by unpublished measurements in absorption and in fluorescence. Data for each ion were analyzed independently, then the model parameters were intercompared and in many cases adjusted such that in the final fitting process the principal interactions showed uniform trends in parameter values with increasing atomic number. Consistent with analyses of the spectra of lanthanide ions in both LaCl3 and LaF3, abrupt changes in magnitude of certain crystal-field parameters were found near the center of the 5fN series. This resulted in two groups of parameter values, but with consistent trends for both halves of the series, and generally very good agreement between observed and computed energies. A new energy-level chart based on computed crystal-field level energies for each trivalent actinide ion has been prepared.

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Section: Bkcl3lk3+:lacl3mentioning

confidence: 89%

Section: H= Hf+hcfmentioning

confidence: 99%

Section: Am3+: Lacl 3 /Amcmentioning

confidence: 99%

Section: Am3+: Lacl 3 /Amcmentioning

confidence: 99%

Section: Gd3+3mentioning

confidence: 99%

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A systematic analysis of the spectra of trivalent actinide chlorides in D3h site symmetry

Carnall

1992

The Journal of Chemical Physics

144

130

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Lanthanides

Sabot¹,

Maestro²

2000

Kirk-Othmer Encyclopedia of Chemical Technology

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Maestro, Patrick, and Sabot, Jean—Louis (Rhône‐Poulenc Inc.). Lanthanides is the name given collectively to the 15 elements from lanthanum to lutetium sharing the same space in Mendeleev's original Periodic Table. Lanthanides have a unique electronic structure because of partially filled 4 f orbitals. Occurrence and preparation of the rare earths is described. Mining of lanthanide ores and the various separation methods are discussed. Except for cerium and europium, the lanthanides are separated industrially of solvent extraction. The production of lanthanide metals is also presented. Industrial applications of lanthanides encompass a number of different fields, including the high technology field of electronics. Uses in metallurgy, catalysis, and the glass and ceramics industry are based on unique chemical and structure properties. Uses as luminescent materials for phosphor applications or in medical imaging technology are limited to specific optical properties. Uses of lanthanides and their alloys as high energy magnets result from the special magnetic properties. Information storage is but one of many industries in which lanthanide usage is expected to grow. Vol. 14, pp. 1091–1116, 51 refs. to January 1993.

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Lanthanides

Leveque¹,

Sabot²,

Maestro³

2001

Kirk-Othmer Encyclopedia of Chemical Technology

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Lanthanides is the name given collectively to the 15 elements from lanthanum to lutetium sharing the same space in Mendeleev's original Periodic Table. Lanthanides have a unique electronic structure because of partially filled 4 f orbitals. Occurrence and preparation of the rare earths is described. Mining of lanthanide ores and the various separation methods are discussed. Except for cerium and europium, the lanthanides are separated industrially of solvent extraction. The production of lanthanide metals is also presented. Industrial applications of lanthanides encompass a number of different fields, including the high technology field of electronics. Uses in metallurgy, catalysis, and the glass and ceramics industry are based on unique chemical and structure properties. Uses as luminescent materials for phosphor applications or in medical imaging technology are limited to specific optical properties. Uses of lanthanides and their alloys as high energy magnets result from the special magnetic properties. Information storage is but one of many industries in which lanthanide usage is expected to grow. Vol. 14, pp. 1091–1116, 51 refs. to January 1993.

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Optical Properties of Actinide and Lanthanide Ions

Cited by 22 publications

References 7 publications

A systematic analysis of the spectra of trivalent actinide chlorides in D3h site symmetry

A systematic analysis of the spectra of trivalent actinide chlorides in D3h site symmetry

Lanthanides

Lanthanides

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