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Spectroscopy and crystal chemical properties of NaCa2[Si4O10]F natural agrellite with tubular structureстатья
- Авторы: Kaneva E., Shendrik R., Mesto E., Bogdanov A., Vladykin N.
- Журнал: Chemical Physics Letters
- Том: 738
- Год издания: 2020
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- DOI: 10.1016/j.cplett.2019.136868
- Аннотация: Agrellite is a rare inosilicate, having a crystal structure characterized by SiO4-tetrahedral tubes located between continuous wall layers formed by edge-sharing Ca-polyhedra. A detailed crystal chemical and physical study of agrellite specimens is carried out by means of electron probe microanalysis, Fourier transform infrared spectroscopy, electron-paramagnetic resonance, and single crystal X-ray diffraction. Additionally, the electronic structures of agrellite was calculated. Luminescence due to 5d-4f transition in Ce3+ ions is observed in both investigated samples. EPR analysis points out the Mn2+ replaces Ca2+ ion in Ca(1A) and Ca(2B) positions, coordinated by two F sites. © 2019 Elsevier B.V.
- Добавил в систему: Шендрик Роман Юрьевич