Synthesis and some properties of BeTe, BeSe and BeS

Yim, Woosoon; Dismukes, John P.; Stofko, E. J.; Paff, R. J.

doi:10.1016/0022-3697(72)90032-7

Cited by 129 publications

(40 citation statements)

References 7 publications

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“…They are also very lower from the theoretical data of Kumar et al [10]. Another experimental work [23] mentioned that BeTe compound dissociates appreciably by vaporization at temperatures above 1000 °C, and the upper limit of the melting point of BeTe material is 1300 °C (~1570 K) , which is agree very well with the result of Van Vechten [22]. The results reported in table.…”

Section: Sound Velocitiessupporting

confidence: 80%

Sound velocities and thermal properties of BeX (X=S, Se and Te) alkaline-earth chalcogenides

Daoud

2016

Int. J. Sci. World

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The sound velocities and some thermal properties of BeX (X=S, Se and Te) beryllium-chalcogenides large band gaps semiconductors have been estimated by employing some usual theoretical and emperical formulas. The lattice parameters and the elastic stiffness constants used here are taken from the literature. The longitudinal, transverse and average elastic wave velocities, the Debye temperature, the melting temperature, the thermal conductivity and the Grüneisen parameter are successfully predicted and analyzed in comparison with the available experimental and theoretical data. In general, our obtained results of these quantities agree well with the experimental and other theoretical data of the literature.

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Section: Sound Velocitiessupporting

confidence: 80%

Sound velocities and thermal properties of BeX (X=S, Se and Te) alkaline-earth chalcogenides

Daoud

2016

Int. J. Sci. World

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“…For both BeSe and BeS we obtain an indirect energy gap from r to X of 2.40 and 2.75 eV, respectively. Experimentally, Be compounds have large band gaps ranging from 2.7 to 5.5 eV [26].…”

Section: Resultsmentioning

confidence: 99%

Electronic and Structural Properties of BeSe, BeTe, and BeS: Comparison between ab‐initio Theory and Experiments

Múñoz

Rodríguez‐Hernández

Mújica

1996

Physica Status Solidi (b)

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We have used first principles total energy pseudopotential techniques to calculate the ground state properties and the relative stabilities of the high pressure phases of the beryllium chalcogenides BeSe, BeTe, and BeS. We study the energy-volume (E-V) relations of the zincblende, NaCl, CsCl, NiAs, and P S n structures of these compounds. The components of the stress tensor were also calculated and used in the structural relaxation of the tetragonal and hexagonal phases. From the E-V curves of the structures considered and the Gibbs construction we find that these compounds transform under pressure from the zincblende structure (B3) to the NiAs structure (B8), and no further transitions are found. Our calculated values of the structural parameters and the B3 + B8 transition pressure for BeSe and BeTe agree well with recent experimental results. Very little is known experimentally for BeS, and our results for this compound have a predictive character.

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“…45 From this point of view, the growth rates of 20 to 40 cm/day for Si from its solution in Au-Si alloy as proposed by Hein [16] are unacceptably high. Also, the values of 30 mm/day for CdIn2Te4 [17] and YlG [18] may appear to be excessively high, but higher temperature gradient, convection or other favourable conditions could perhaps have made higher growth rates possible.…”

Section: Excessive Rate Of Travelling Heater Movementmentioning

confidence: 98%