The elastic constants of rubidium

Roberts, CarolA.; Meister, Robert

doi:10.1016/0022-3697(66)90135-1

Cited by 30 publications

(3 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The experimental values in the last row of Table 2 are quoted from Table 2 in [5]. The values of for A1 and P b are negative and therefore inconsistent with (26). The present results of the binding energy are in good agreement with experiment for alkali metals except Li.…”

Section: Numerical Calculations and Discussionsupporting

confidence: 72%

Calculation of Binding Energy and Elastic Constants of Simple Metals

Shimada

1974

Physica Status Solidi (b)

View full text Add to dashboard Cite

By use of the simple model potential which is a smooth function and whose parameters depend on the lattice constant, the total energy expression is obtained by the second order perturbation theory. One calculates the binding energy, the lattice constant, and elastic constants of simple metal with cubic structure and finds the numerical values of parameters which give good agreement with the experiment in the case of alkali metals except Li.Mit einem einfachen Modellpotential, das eine glatte Funktion ist und dessen Parameter von der Gitterkonstante abhkngen, wird der gesamte Energieausdruck durch Storungstheorie zweiter Ordnung erhalten. Die Bindungsenergie, die Gitterkonstante und die elastischen Konstanten von einfachen Metallen mit kubischer Struktur werden berechnet und numerische Werte fur die Parameter gefunden, die sich in guter Ubereinstimmung mit dem Experiment bei den Alkalimetallen, aul3er Li, befinden.

show abstract

Section: Numerical Calculations and Discussionsupporting

confidence: 72%

Calculation of Binding Energy and Elastic Constants of Simple Metals

Shimada

1974

Physica Status Solidi (b)

View full text Add to dashboard Cite

show abstract

“…The phonon frequencies of rubidium were measured at 120 ~ by COPLEY et al [19]. The experimental value of elastic constants of this metal was available only at 80 ~ from the work of ROBERTS and MEISTE~ER [20]. Then se of 80 ~ elastic constants did not gire a good fit with experimental results.…”

Section: Numerical Eomputationsmentioning

confidence: 99%

Extended de Launay model study of lattice dynamics of alkali metals

Cavalheiro

Shukla

1974

Acta Physica

View full text Add to dashboard Cite

The original model of de Launay has been extended to consider interionic interactions. out to fourth neighbours. The present formalism has been applied to study lattice dynamies of four alkali metals viz sodium, potassium, lithium and rubidium. The phonon dispersion curves along the principal symmetry direetions, frcqucncy versus frequeney distribution function as well as lattice heat capacities ate calculated and compared to experimental results. An excellent agreement has been obtained between the theoretical and experimental results. for all the four metals studied herc.

show abstract

“…The notation u,, (aT,, aTJ, will be used for the angle between ^el and the direc- Elastic constants are taken from [17] except for Rb [18] and Pt and Ir [19]. tion the considered mode would have in an isotropic medium.…”

Section: Numerical Tzamplesmentioning

confidence: 99%

On the Polarization Vectors of Lattice Vibrations

Grimvall

1969

Physica Status Solidi (b)

View full text Add to dashboard Cite

The polarization vectors of lattice vibrations in anisotropic crystals of cubic structure are considered from a quantitative point of view. A new anisotropy index A = cll/(c12 +2 c4J is shown to be more adequate as a measure of anisotropy than the conventional s = = (cn -c12)/2 c4p The reason for anisotropy is discussed briefly, with special emphasis on simple metals. The approximation of assuming the lattice vibrations to be strictly longitudinal or transverse is discussedfor several properties of metals, with sodium taken as an example.Die Polarisationsvektoren fur Gitterschwingungen werden in anisotropen Kristallen mit kubischer Symmetrie numerisch untersucht. Es wird gezeigt, daO ein neuer Index der Anisotropie A = clI/(cI1 + 2 c44) besser als s = (cll -cI2)/2 c44 die Anisotropie charakterisiert.Die Ursache der Anisotropie in Metallen wird kurz behandelt. Als Beispiel wird die theoretische Approximation mit der Annahme genau longitudinaler und transversaler Gitterschwingungen an Natrium untersucht.

show abstract

The elastic constants of rubidium

Cited by 30 publications

References 2 publications

Calculation of Binding Energy and Elastic Constants of Simple Metals

Calculation of Binding Energy and Elastic Constants of Simple Metals

Extended de Launay model study of lattice dynamics of alkali metals

On the Polarization Vectors of Lattice Vibrations

Contact Info

Product

Resources

About