{"title":"辉钼矿的高压行为:单晶x射线衍射研究","authors":"Yurii V. Seryotkin","doi":"10.1007/s00269-022-01205-6","DOIUrl":null,"url":null,"abstract":"<div><p>The high-pressure (H<i>P</i>) behavior of natural stellerite |Ca<sub>4.00</sub>Na<sub>0.16</sub> (H<sub>2</sub>O)<sub>32</sub>| [Al<sub>8.16</sub>Si<sub>27.84</sub>O<sub>72</sub>] has been studied by single-crystal X-ray diffraction using a diamond-anvil cell under pressures up to 4.5 GPa, with a 4:1 ethanol:water mixture and paraffin as pressure-transmitting media. The changes in the structure of stellerite at high pressures, especially the STI framework deformation, are similar to those in Na-rich stilbite |Ca<sub>4.00</sub>Na<sub>1.47</sub> (H<sub>2</sub>O)<sub>30</sub>| [Al<sub>9.47</sub>Si<sub>26.53</sub>O<sub>72</sub>]. Both stilbite and stellerite udergo pressure-induced hydration, in which H<sub>2</sub>O molecules first occupy partly vacant sites and then the initially vacant positions. Some difference in the behavior of the two minerals is due to the presence of Na<sup>+</sup> cations in stilbite. Sodium occupies positions in the 10-membered ring and prevents H<sub>2</sub>O molecules from penetrating near the ring center. Meanwhile, both stellerite and stilbite can fill the initially vacant sites in the 8-membered ring at high pressures. The pressure-induced changes, including the reduction of H<sub>2</sub>O sites in the cation coordination and a total number of H<sub>2</sub>O molecules, are less significant in Na-bearing stilbite than in stellerite.</p></div>","PeriodicalId":20132,"journal":{"name":"Physics and Chemistry of Minerals","volume":"49 7","pages":""},"PeriodicalIF":1.2000,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"High-pressure behaviour of stellerite: single-crystal X-ray diffraction study\",\"authors\":\"Yurii V. Seryotkin\",\"doi\":\"10.1007/s00269-022-01205-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The high-pressure (H<i>P</i>) behavior of natural stellerite |Ca<sub>4.00</sub>Na<sub>0.16</sub> (H<sub>2</sub>O)<sub>32</sub>| [Al<sub>8.16</sub>Si<sub>27.84</sub>O<sub>72</sub>] has been studied by single-crystal X-ray diffraction using a diamond-anvil cell under pressures up to 4.5 GPa, with a 4:1 ethanol:water mixture and paraffin as pressure-transmitting media. The changes in the structure of stellerite at high pressures, especially the STI framework deformation, are similar to those in Na-rich stilbite |Ca<sub>4.00</sub>Na<sub>1.47</sub> (H<sub>2</sub>O)<sub>30</sub>| [Al<sub>9.47</sub>Si<sub>26.53</sub>O<sub>72</sub>]. Both stilbite and stellerite udergo pressure-induced hydration, in which H<sub>2</sub>O molecules first occupy partly vacant sites and then the initially vacant positions. Some difference in the behavior of the two minerals is due to the presence of Na<sup>+</sup> cations in stilbite. Sodium occupies positions in the 10-membered ring and prevents H<sub>2</sub>O molecules from penetrating near the ring center. Meanwhile, both stellerite and stilbite can fill the initially vacant sites in the 8-membered ring at high pressures. The pressure-induced changes, including the reduction of H<sub>2</sub>O sites in the cation coordination and a total number of H<sub>2</sub>O molecules, are less significant in Na-bearing stilbite than in stellerite.</p></div>\",\"PeriodicalId\":20132,\"journal\":{\"name\":\"Physics and Chemistry of Minerals\",\"volume\":\"49 7\",\"pages\":\"\"},\"PeriodicalIF\":1.2000,\"publicationDate\":\"2022-06-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Physics and Chemistry of Minerals\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s00269-022-01205-6\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physics and Chemistry of Minerals","FirstCategoryId":"89","ListUrlMain":"https://link.springer.com/article/10.1007/s00269-022-01205-6","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
High-pressure behaviour of stellerite: single-crystal X-ray diffraction study
The high-pressure (HP) behavior of natural stellerite |Ca4.00Na0.16 (H2O)32| [Al8.16Si27.84O72] has been studied by single-crystal X-ray diffraction using a diamond-anvil cell under pressures up to 4.5 GPa, with a 4:1 ethanol:water mixture and paraffin as pressure-transmitting media. The changes in the structure of stellerite at high pressures, especially the STI framework deformation, are similar to those in Na-rich stilbite |Ca4.00Na1.47 (H2O)30| [Al9.47Si26.53O72]. Both stilbite and stellerite udergo pressure-induced hydration, in which H2O molecules first occupy partly vacant sites and then the initially vacant positions. Some difference in the behavior of the two minerals is due to the presence of Na+ cations in stilbite. Sodium occupies positions in the 10-membered ring and prevents H2O molecules from penetrating near the ring center. Meanwhile, both stellerite and stilbite can fill the initially vacant sites in the 8-membered ring at high pressures. The pressure-induced changes, including the reduction of H2O sites in the cation coordination and a total number of H2O molecules, are less significant in Na-bearing stilbite than in stellerite.
期刊介绍:
Physics and Chemistry of Minerals is an international journal devoted to publishing articles and short communications of physical or chemical studies on minerals or solids related to minerals. The aim of the journal is to support competent interdisciplinary work in mineralogy and physics or chemistry. Particular emphasis is placed on applications of modern techniques or new theories and models to interpret atomic structures and physical or chemical properties of minerals. Some subjects of interest are:
-Relationships between atomic structure and crystalline state (structures of various states, crystal energies, crystal growth, thermodynamic studies, phase transformations, solid solution, exsolution phenomena, etc.)
-General solid state spectroscopy (ultraviolet, visible, infrared, Raman, ESCA, luminescence, X-ray, electron paramagnetic resonance, nuclear magnetic resonance, gamma ray resonance, etc.)
-Experimental and theoretical analysis of chemical bonding in minerals (application of crystal field, molecular orbital, band theories, etc.)
-Physical properties (magnetic, mechanical, electric, optical, thermodynamic, etc.)
-Relations between thermal expansion, compressibility, elastic constants, and fundamental properties of atomic structure, particularly as applied to geophysical problems
-Electron microscopy in support of physical and chemical studies
-Computational methods in the study of the structure and properties of minerals
-Mineral surfaces (experimental methods, structure and properties)