Crystal Research and Technology
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Editor: Wolfgang Neumann (Editor-in-Chief), Klaus-W. Benz (Consulting Editor)
Online ISSN: 1521-4079
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Recently Published Articles
- Synthesis and crystal growth of microcrystals of the cubic and new orthorhombic polymorphs of (NH4)2SnCl6
Slawomir Podsiadlo, Grzegorz Weisbrod, Maciej Bialoglowski, Daniel Jastrzebski, Mohammad Fadaghi and Andrzej Ostrowski
Article first published online: 7 JUL 2015 | DOI: 10.1002/crat.201500054
A novel method for synthesis of ammonium hexachlorostannate single crystals has been elaborated. The process involved a decomposition of an adduct of the reaction of liquid stannic chloride with gaseous ammonia – SnCl4·5NH3. Within the products, a formely unknown orthorhombic polymorph of (NH4)2SnCl6 has been discovered. Additionally, the structure of its cubic form has been refined.
- Estimating the real crystal radius from the weight signal in a course of growth process by the Stepanov (EFG) technique
S.N. Rossolenko, D.O. Stryukov and V.N. Kurlov
Article first published online: 7 JUL 2015 | DOI: 10.1002/crat.201500042
During the process of crystal growth from the melt with use of the die it is necessary to know the real crystal radius, because the process may be held in completely closed crystallization zone (without observing window) – for the producing the crystal of best quality via symmetric thermal field in the crystallization zone. In this paper the calculation of the real radius from the weight signal in course of the growth process is considered.
- The effect of cooling rate on size, quality and morphology of KTiOPO4 (KTP) crystals grown by different nucleation techniques
Gharibshahian Elaheh and Jafar Tafreshi Majid
Article first published online: 2 JUL 2015 | DOI: 10.1002/crat.201500002
KTP crystals have been grown by two nucleation techniques namely spontaneous nucleation in flux medium and nucleation on Pt rod using K6P4O13 flux. The effect of cooling rate on size, morphology and optical quality of grown crystals by both techniques were studied. For growth by spontaneous nucleation, these properties improved by decreasing the cooling rate. But the effect of cooling rate was a little complicated for growth by nucleation on Pt rod. Also it was observed that for each cooling rate nucleation on Pt rod was only occurred in limited range of rotation rate.
- The double phosphates MIMIIPO4 (MI – Na, K; MII – Mg, Mn, Co, Ni, Zn) – synthesis from chloride melts and characterization
Oksana V. Livitska, Nataliia Yu. Strutynska, Igor V. Zatovsky and Nikolay S. Slobodyanik
Article first published online: 2 JUL 2015 | DOI: 10.1002/crat.201500028
This work describes peculiarities of synthesis of complex phosphates MIMIIPO4 (MI – Na, K; MII – Mg, Mn, Co, Ni, Zn) and Na4Ni3(PO4)2P2O7 in chloride melts. Obtained compounds were investigated using the powder X-ray diffraction, Fourier transform infrared spectroscopy and Diffuse reflectance spectroscopy. The main advantages of proposed approach such as synthesis time reduction, temperature reducing and possibility of crystal size control were shown.
- Cooling crystallization of aluminum sulfate in pure water modulated by sodium dodecylbenzenesulfonate
Xiaoxue Sun, Yuzhu Sun and Jianguo Yu
Article first published online: 2 JUL 2015 | DOI: 10.1002/crat.201500116
Cooling crystallization process of aluminum sulfate with sodium dodecylbenzenesulfonate (SDBS) was investigated experimentally and explained from the perspective of molecular dynamics. SDBS can inhibit crystal nucleation and promote growth, which enables aluminum sulfate crystals to grow larger and more uniformed in morphology.