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Potassium Hydrogen Tartrate Single Crystals (potassium + hydrogen_tartrate_single_crystal)

Distribution by Scientific Domains
Physics and Astronomy100%

Selected Abstracts

Characterization of pure and doped potassium hydrogen tartrate single crystals grown in silica gel

CRYSTAL RESEARCH AND TECHNOLOGY, Issue 5 2009
I. Quasim
Abstract Growth of pure-, sodium- and lithium- doped potassium hydrogen tartrate single crystals by gel technique is reported. Growth conditions conducive for the growth of single crystals are worked out. The crystals are characterized by using powder XRD, SEM, FTIR, AES, EDAX, CH analysis and thermoanalytical techniques. The stoichiometric composition for the grown crystals are established as KHC4H4O6.H2O, (K)0.98(Na)0.02.H2O and (K)0.94(Li)0.06HC4H4O6.H2O. Doping of sodium and lithium in the pure potassium hydrogen tartrate single crystals is found to influence the size, perfection, morphology, crystal structure and the thermal stability of crystals. (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

Micromechanical behaviour of gel grown pure and doped potassium hydrogen tartrate single crystals

PHYSICA STATUS SOLIDI (A) APPLICATIONS AND MATERIALS SCIENCE, Issue 12 2009
I. Quasim
Abstract Micromechanical characteristics of (001) and (111) planes of gel grown pure, sodium- and lithium-doped potassium hydrogen tartrate single crystals as revealed by indentation induced technique are described. The indentation size effect (ISE) exhibited by the crystals is explained on application of proportional specimen resistance (PSR) model and the analytical law of Hays and Kendall. The load independent values of Vickers hardness of (001) and (111) planes of these crystals as indicated by indentation experiments and computed on the basis of PSR model and the analytical law are shown to be in good agreement. The doping by sodium or lithium results in the increase in hardness of potassium hydrogen tartrate crystals. The crystals exhibit hardness anisotropy. The values of yield strength of each plane of both pure and sodium and lithium doped potassium hydrogen tartrate single crystals are estimated using appropriate equations. [source]