Thermal investigation of ammonioborite (NH4)3[B15O20(OH)8] · 4H2O.
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| Title: | Thermal investigation of ammonioborite (NH |
|---|---|
| Authors: | J. Anderson1, R. Bubnova1, S. Filatov2, V. Ugolkov1, S. Britvin2 |
| Source: | Glass Physics & Chemistry. Apr2009, Vol. 35 Issue 2, p191-198. 8p. |
| Subjects: | Thermal analysis, Analytical chemistry, Thermogravimetry, Determinative mineralogy |
| Abstract: | Abstract  The thermal behavior of ammonioborite (NH4)3[B15O20(OH)8] · 4H2O is investigated using thermal X-ray diffraction, differential thermal analysis (DTA) in air and vacuum, and thermogravimetry. It is shown that the decomposition of the mineral (dehydration, dehydroxylation, deammoniation) proceeds in several stages, and the dehydration is accompanied by the amorphization. The thermal expansion of ammonioborite is sharply anisotropic. As in the case of other hydrous pentaborates, the thermal expansion is maximum in the direction in which pentaborate groups alternate with ammonium 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: 39058731 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Thermal investigation of ammonioborite (NH<subscript>4</subscript>)<subscript>3</subscript>[B<subscript>15</subscript>O<subscript>20</subscript>(OH)<subscript>8</subscript>] · 4H<subscript>2</subscript>O. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22J%2E+Anderson%22">J. Anderson</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22R%2E+Bubnova%22">R. Bubnova</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22S%2E+Filatov%22">S. Filatov</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22V%2E+Ugolkov%22">V. Ugolkov</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22S%2E+Britvin%22">S. Britvin</searchLink><relatesTo>2</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Glass+Physics+%26+Chemistry%22">Glass Physics & Chemistry</searchLink>. Apr2009, Vol. 35 Issue 2, p191-198. 8p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Thermal+analysis%22">Thermal analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Analytical+chemistry%22">Analytical chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Thermogravimetry%22">Thermogravimetry</searchLink><br /><searchLink fieldCode="DE" term="%22Determinative+mineralogy%22">Determinative mineralogy</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract  The thermal behavior of ammonioborite (NH4)3[B15O20(OH)8] · 4H2O is investigated using thermal X-ray diffraction, differential thermal analysis (DTA) in air and vacuum, and thermogravimetry. It is shown that the decomposition of the mineral (dehydration, dehydroxylation, deammoniation) proceeds in several stages, and the dehydration is accompanied by the amorphization. The thermal expansion of ammonioborite is sharply anisotropic. As in the case of other hydrous pentaborates, the thermal expansion is maximum in the direction in which pentaborate groups alternate with ammonium 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/S1087659609020114 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 8 StartPage: 191 Subjects: – SubjectFull: Thermal analysis Type: general – SubjectFull: Analytical chemistry Type: general – SubjectFull: Thermogravimetry Type: general – SubjectFull: Determinative mineralogy Type: general Titles: – TitleFull: Thermal investigation of ammonioborite (NH4)3[B15O20(OH)8] · 4H2O. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: J. Anderson – PersonEntity: Name: NameFull: R. Bubnova – PersonEntity: Name: NameFull: S. Filatov – PersonEntity: Name: NameFull: V. Ugolkov – PersonEntity: Name: NameFull: S. Britvin IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr2009 Type: published Y: 2009 Identifiers: – Type: issn-print Value: 10876596 Numbering: – Type: volume Value: 35 – Type: issue Value: 2 Titles: – TitleFull: Glass Physics & Chemistry Type: main |
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