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Abstract  

The influence of the point defects introduced by means of Sm3+ on the thermal properties of LiKSO4 crystals was studied in the vicinity of the high-temperature phase at 708 and 940 K. The temperature dependence of the specific heat was found to vary monotonously with the Sm3+content, while the first transition temperature was unchanged. The change in the value of the specific heat was attributed to the correlation between the defect-defect interaction and the presence of internal local strain generated inside the crystal. The variation of the excess specific heat with the reduced temperature obeys the 3d Ising model.

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Journal of Thermal Analysis and Calorimetry
Authors: S. Gopinath, S. Barathan, and R. Rajasekaran

Introduction Extensive research has been made over the past few decades on the growth of non-linear optical (NLO) crystals. NLO materials have their potential applications in the field of laser technology, optical communication

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to be refuted. Histological detectability of urate crystals. [A hisztokémia egy megdőlni látszó dogmája. Urátkristályok szövettani kimutathatósága.] LAM-KID, 2013, 3 , 23–26. [Hungarian] Krutsay M

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inorganic acid and salts to produce outstanding materials for NLO applications. Single crystal of l -alanine with excellent NLO property was first reported by Misoguti et al. [ 10 ]. Many authors have intensively studied the growth and characterization of

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are very useful techniques for materials characterization. Therefore, it is not surprising that many authors have applied these techniques for investigation of many materials [ 19 – 32 ]. In this study, mixed crystals of bisthiourea-urea (BTU) have

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Journal of Thermal Analysis and Calorimetry
Authors: V. Meenatchi, K. Muthu, M. Rajasekar, S. P. Meenakshisundaram, and S. C. Mojumdar

crystallization method needle-like salicylic acid crystals of 10–12 mm in length have been grown [ 7 ]. Guo et al . [ 8 ] and Zhang et al . [ 9 ] have prepared needle-like salicylic acid crystallites with average diameters of 34 and 16 μm, respectively, by

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Spectral and thermal characterization of grown organic single crystal

Semicarbazone of p-hydroxy benzaldehyde (SPHB)

Journal of Thermal Analysis and Calorimetry
Authors: S. Janarthanan, R. Sugaraj Samuel, Y. C. Rajan, P. R. Umarani, and S. Pandi

Introduction It is very essential to grow large size single crystals of new organic non-linear optical (NLO) materials with increased perfection due to rapid developments happening in the photonics technology. Many organic

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Journal of Thermal Analysis and Calorimetry
Authors: G. Vasudevan, P. AnbuSrinivasan, G. Madhurambal, and S. C. Mojumdar

ammonium sulphate added KAP solutions were taken in two similar beakers at 30 °C (room temperature) and kept undisturbed by covering with a thick sheet of paper for controlled slow evaporation after solubility determination. Good quality crystals of pure

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of cinnamic acid-urea single crystal. Experimental Synthesis The cinnamic acid–urea single crystals were prepared by digesting appropriate weighed amount of cinnamic acid in methanol of urea in

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Abstract  

A survey of materials science through our experiences shows that our knowledge of amorphous solids is quite poor compared with that of crystalline solids. Most pure substances can be obtained, in principle, as crystalline as well as non-crystalline states by physical and chemical methods. Destruction of the three-dimensional periodicity in crystalline substances will produce novel properties which cannot be anticipated from knowledge of crystal sciences. One direction of materials science in the coming century will surely be a new realm of amorphous condensed matter science.

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