Lattice parameter and hardness measurements on high purity beryllium

Mackay, K.J.H.; Hill, N.W.

doi:10.1016/0022-3115(63)90043-6

Cited by 54 publications

(12 citation statements)

References 4 publications

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“…As for the hcp phase, the calculated c/a ratio at 0 GPa is 1.573, in accordance with the experimental value c/a = 1.568 [37] and theoretical result 1.573 [18]. When the pressure increases to 180 GPa, the predicted c/a = 1.605 ratio is very close to the experimental value 1.60 [13], which further demonstrates the reliability of our calculations.…”

Section: Phasesupporting

confidence: 91%

Novel R3¯m phase of beryllium under high pressure

Qiu

et al. 2015

Physics Letters A

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Section: Phasesupporting

confidence: 91%

Novel R3¯m phase of beryllium under high pressure

Qiu

et al. 2015

Physics Letters A

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“…where the reciprocal lattice parameters (Mackay & Hill, 1963) Thermal parameters are the only variable. Estimated standard deviations are shown in parentheses and refer to the last digit.…”

Section: Scattering-factor Modelmentioning

confidence: 99%

A charge-density study of crystalline beryllium

Stewart¹

1977

Acta Cryst Sect A

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The X-ray structure factors for crystalline beryllium measured by Brown [Phil. Mag. (1972), 26, 1377 have been analyzed with multipole deformation functions for charge-density information. Single exponential radial functions were used for the valence charge density. A valence monopole plus the three harmonics, P~(cos 0) sin 3¢0, P6(COS 0) and P~(cos 0) sin 3q~, provide a least-squares fit to the data with R~ =0.0081. The superposition of these density functions describes a bonding charge density between Be atoms along the c axis through the tetrahedral vacancy. The results reported here are in qualitative agreement with a recent pseudo-potential calculation of metallic beryllium. The final residuals in the analysis are largest at high sin 0/2 values. This suggests that core charge deformation is present and/or anharmonic motion of the nuclei is appreciable.

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“…Равновесные постоянные кристаллической решетки для ГПУ-бериллия оказались равными a = 2.36 ¦ и c = 3.70 ¦ [57,58], что несколько выше их эксперимен-тальных значений a = 2.29 ¦ и c = 3.58 ¦ [59].…”

Section: методика компьютерного моделированияunclassified

Свойства Движущихся Дискретных Бризеров В Бериллии

Бачурина¹,

Мурзаев²,

Семенов³

et al. 2018

Физика Твердого Тела

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Discrete breathers (DBs) have been described among pure metals with face-centered cubic (FCC) and body-centered cubic (BCC) lattice, but for hexagonal close-packed (HCP) metals, their properties are little studied. In this paper, the properties of standing and moving DBs in beryllium HCP metal are analyzed by the molecular dynamics method using the many-body interatomic potential. It is shown that the DB is localized in a close-packed atomic row in the basal plane, while oscillations with a large amplitude along the close-packed row are made by two or three atoms, moving in antiphase with the nearest neighbors. Dependences of the DB frequency on the amplitude, as well as the velocity of the DB on its amplitude and on parameter δ, which determines the phase difference of the oscillations of neighboring atoms, are obtained. The maximum velocity of the DB movement in beryllium reaches 4.35 km/s, which is 33.7% of the velocity of longitudinal sound waves. The obtained results supplement our concepts about the mechanisms of localization and energy transport in HCP metals.

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Lattice parameter and hardness measurements on high purity beryllium

Cited by 54 publications

References 4 publications

Novel R3¯m phase of beryllium under high pressure

Novel R3¯m phase of beryllium under high pressure

A charge-density study of crystalline beryllium

Свойства Движущихся Дискретных Бризеров В Бериллии

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