Elastic constants of solid solutions of single crystals of the alkali halides

1973 ◽  
Vol 16 (7) ◽  
pp. 938-941
Author(s):  
V. L. Ul'yanov ◽  
A. A. Botaki ◽  
A. V. Sharko
Keyword(s):  
Single Crystals ◽  
Solid Solutions ◽  
Elastic Constants ◽  
Alkali Halides

Elastic constants of some NaCl type alkali halides

1966 ◽  
Vol 18 (1) ◽  
pp. 265-277 ◽  
Author(s):  
R. C. Lincoln ◽  
K. M. Koliwad ◽  
P. B. Ghate
Keyword(s):  
Elastic Constants ◽  
Alkali Halides

A-Pr2S3, D-Ho2S3 und E-Yb2S3:Synthese und Einkristallstrukturuntersuchungen / A-Pr2S3, D-Ho2S3 and E-Yb2S3:Synthesis and Single Crystal Structure Investigations

1996 ◽  
Vol 51 (5) ◽  
pp. 733-738 ◽  
Author(s):  
Thomas Schleid ◽  
Falk Lissner
Keyword(s):  
Crystal Structure ◽  
Crystal Growth ◽  
Single Crystals ◽  
Alkali Halides ◽  
Structural Investigations ◽  
Coordination Numbers ◽  
Trivalent Lanthanides ◽  
Trivalent Cations ◽  
Structure Investigations ◽  
Type Orthorhombic

The oxidation of reduced chlorides (MCl2) or chloride-hydrides (MClHx) of the lanthanides with sulfur (700-850 °C, 7 d, sealed tantalum capsules or evacuated silica vessels) usually results in the formation of the sesquisulfides M2S3 as the main products. In the presence of appropriate fluxes (e.g., alkali halides), the products often are obtained as single crystals, and the flux decides which modification is favoured. Ternary halides of the trivalent lanthanides with the corresponding alkali metal can mostly be found as the second components. Crystal growth and structural investigations of thus produced single crystals of Pr2S3 (from PrClH0.67 + S + NaCl, 5:5:1, A type: orthorhombic, Pnma (No. 62), Z = 4, a = 748.22(5), b = 405.51(3), c = 1560.74(9) pm, R = 0.024, Rw = 0.020), Ho2S3, (from U - Ho2S3, + KI, 1:1, D type: monoclinic, P21/m (No. 12), Z = 6, a = 1746.15(9), b = 400.23(3), c = 1012.43(6) pm, β = 98.529(4)°, R = 0.041, Rw = 0.035), and Yb2S3 (from T-Yb2S3 + KI, 1:1, E type: trigonal, R3̄c (No. 167), Z = 6, a = 674.97(2), c = 1820.11(9) pm, R = 0.019, Rw = 0.018) are reported here. In accordance with the lanthanide contraction, the trivalent cations (M3+) exhibit sulfur coordination numbers of 7 and 8 in A -Pr2S3, 6 and 7 in D -Ho2S3, and 6 in E -Yb2S3 (corundum-type structure).

scholarly journals The Elastic Constants of the Single Crystal of the Mg-Zn-Zr-REM Alloy from the Data of the Elastic Anisotropy and the Texture of the Polycrystalline Sheet

2014 ◽  
Vol 2014 ◽  
pp. 1-6
Author(s):  
S. V. San’kova ◽  
N. M. Shkatulyak ◽  
V. V. Usov ◽  
N. A. Volchok
Keyword(s):  
Single Crystals ◽  
Young’S Modulus ◽  
Elastic Constants ◽  
Elastic Anisotropy ◽  
Young's Modulus ◽  
Rare Earth Metals ◽  
Alloy Sheet ◽  
Pole Figures ◽  
Integral Characteristics ◽  
Experimental Values

The measuring of the constants of single-crystals requires the availability of crystals of relatively big size. In this paper the elastic constants of the single crystals of magnesium alloy with zinc, zirconium, and rare earth metals (REM) were determined by means of the experimental anisotropy of Young’s modulus and integral characteristics of texture (ICT), which were found from pole figures. Using these constants the anisotropy of Young’s modulus of alloy sheet ZE10 was calculated. Deviation of calculated values from experimental values did not exceed 2%.

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