Thermal expansion and polymorphism in a series of rubidium cesium boroleucites.
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| Title: | Thermal expansion and polymorphism in a series of rubidium cesium boroleucites. |
|---|---|
| Authors: | M. Krzhizhanovskaya1, R. Bubnova2, V. Ugolkov2, S. Filatov1 |
| Source: | Glass Physics & Chemistry. Jun2007, Vol. 33 Issue 3, p242-249. 8p. |
| Subjects: | X-ray diffraction, Polymorphism (Crystallography), Rubidium, Cesium |
| Abstract: | Abstract The crystal structure of the boroleucite solid solution Rb0.40Cs0.54B0.94Si2.06O6 is refined in space group I-43d by the Rietveld method with the use of the X-ray powder diffraction data. The refinement data complement the available crystal chemical characteristics of Rb1−x Cs x BSi2O6 solid solutions. The thermal expansion and phase transformations of Rb1−x Cs x BSi2O6 borosilicates are investigated in parallel by high-temperature X-ray diffraction with conventional powdered samples and by the dilatometric method with samples in the form of pressed pellets. It is demonstrated that the thermal expansion coefficients, as well as the temperatures and sequence of polymorphic transitions, which are determined from the data obtained by two methods are in close agreement. The temperature curve of the I-43d ⇄ Ia3d phase transition for the Rb1−x Cs x BSi2O6 solid solution system is constructed from the data obtained by both methods. It is shown with the use of the structural data obtained by the Rietveld method that, at temperatures above 800C, rubidium-cesium boroleucites undergo decomposition due to the release of alkali cations. [ABSTRACT FROM AUTHOR] |
| Copyright of Glass Physics & Chemistry is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 25726166 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Thermal expansion and polymorphism in a series of rubidium cesium boroleucites. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22M%2E+Krzhizhanovskaya%22">M. Krzhizhanovskaya</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22R%2E+Bubnova%22">R. Bubnova</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22V%2E+Ugolkov%22">V. Ugolkov</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22S%2E+Filatov%22">S. Filatov</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Glass+Physics+%26+Chemistry%22">Glass Physics & Chemistry</searchLink>. Jun2007, Vol. 33 Issue 3, p242-249. 8p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22X-ray+diffraction%22">X-ray diffraction</searchLink><br /><searchLink fieldCode="DE" term="%22Polymorphism+%28Crystallography%29%22">Polymorphism (Crystallography)</searchLink><br /><searchLink fieldCode="DE" term="%22Rubidium%22">Rubidium</searchLink><br /><searchLink fieldCode="DE" term="%22Cesium%22">Cesium</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract  The crystal structure of the boroleucite solid solution Rb0.40Cs0.54B0.94Si2.06O6 is refined in space group I-43d by the Rietveld method with the use of the X-ray powder diffraction data. The refinement data complement the available crystal chemical characteristics of Rb1−x Cs x BSi2O6 solid solutions. The thermal expansion and phase transformations of Rb1−x Cs x BSi2O6 borosilicates are investigated in parallel by high-temperature X-ray diffraction with conventional powdered samples and by the dilatometric method with samples in the form of pressed pellets. It is demonstrated that the thermal expansion coefficients, as well as the temperatures and sequence of polymorphic transitions, which are determined from the data obtained by two methods are in close agreement. The temperature curve of the I-43d ⇄ Ia3d phase transition for the Rb1−x Cs x BSi2O6 solid solution system is constructed from the data obtained by both methods. It is shown with the use of the structural data obtained by the Rietveld method that, at temperatures above 800C, rubidium-cesium boroleucites undergo decomposition due to the release of alkali cations. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Glass Physics & Chemistry is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1134/S1087659607030091 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 8 StartPage: 242 Subjects: – SubjectFull: X-ray diffraction Type: general – SubjectFull: Polymorphism (Crystallography) Type: general – SubjectFull: Rubidium Type: general – SubjectFull: Cesium Type: general Titles: – TitleFull: Thermal expansion and polymorphism in a series of rubidium cesium boroleucites. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: M. Krzhizhanovskaya – PersonEntity: Name: NameFull: R. Bubnova – PersonEntity: Name: NameFull: V. Ugolkov – PersonEntity: Name: NameFull: S. Filatov IsPartOfRelationships: – BibEntity: Dates: – D: 05 M: 06 Text: Jun2007 Type: published Y: 2007 Identifiers: – Type: issn-print Value: 10876596 Numbering: – Type: volume Value: 33 – Type: issue Value: 3 Titles: – TitleFull: Glass Physics & Chemistry Type: main |
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