Relationships between the Structural, Vibrational, and Optical Properties of Microporous Cancrinite
| Autor: | Tatiana A. Radomskaya, E. V. Kaneva, Alexander E. Marfin, Roman Shendrik, Igor Sharygin |
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| Rok vydání: | 2021 |
| Předmět: |
crystal structure
Materials science Crystal chemistry General Chemical Engineering Infrared spectroscopy 02 engineering and technology 010502 geochemistry & geophysics 01 natural sciences law.invention Inorganic Chemistry symbols.namesake Aluminosilicate law lcsh:QD901-999 crystal chemistry General Materials Science Spectroscopy Electron paramagnetic resonance ESR 0105 earth and related environmental sciences cancrinite optical absorption spectroscopy Microporous material 021001 nanoscience & nanotechnology Condensed Matter Physics Cancrinite Crystallography IR spectroscopy Raman spectroscopy symbols lcsh:Crystallography 0210 nano-technology |
| Zdroj: | Crystals Volume 11 Issue 3 Crystals, Vol 11, Iss 280, p 280 (2021) |
| ISSN: | 2073-4352 |
| DOI: | 10.3390/cryst11030280 |
| Popis: | The crystal-chemical, vibrational, and optical properties of microporous aluminosilicate cancrinite have been investigated by combining electron probe microanalysis, single-crystal X-ray diffraction, infrared (IR) absorption, Raman, UV-Visible absorption, and electron spin resonance spectroscopy. The behavior of the peaks in the IR spectra was also studied during the dehydration of the sample. The analyzed sample has the following unit cell parameters (P63): a = 12.63189(14) Å, c = 5.13601(7) Å. The empirical formula, based on 12(Si + Al), is Na6.47Ca1.23K0.01[Al5.97Si6.03O24] (CO3)1.45(SO4)0.03Cl0.01·2H2O. The Al-Si framework of AB-type is formed by columns of based-shared “cancrinite” (CAN) cages, containing Na and H2O positions located on the 3-fold axis, and channels with CO3 groups, lying in two mutually exclusive and partially occupied positions in the center of the channel, and split Na/Ca cation sites. The revealed characteristics are somewhat different in comparison with the cancrinite structural features previously described in the literature. Studied crystals change color from grayish-pink to blue after X-ray irradiation (104 Gy). The blue color of the irradiated cancrinite is caused by the formation (CO3)−● radicals in the crystals. Combining the results obtained using the selected methods will provide a better understanding of the relationships between the structural, chemical, and optical-physical properties of microporous aluminosilicates. |
| Databáze: | OpenAIRE |
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