A New Study of Twinning in Neptunite.
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| Title: | A New Study of Twinning in Neptunite. |
|---|---|
| Authors: | Richards, R. Peter1 (AUTHOR), Žorž, Mirjan2 (AUTHOR) |
| Source: | Rocks & Minerals. Mar2022, Vol. 97 Issue 2, p165-172. 8p. |
| Subjects: | Twin studies, Right angle, Gems & precious stones, Twinning (Crystallography) |
| Abstract: | Penetration Twins Penetration twins of the sort seen in neptunite are composed of two individuals that are identical (ideally) and cross at an angle that is determined by the twin law and described by the Miller indices of the twin law. Comparison with figure 11 shows that the correct twin plane is (10 Graph HT ht ), not (90 Graph HT ht ). One of these planes is the true twin plane - it has the same Miller indices as the twin law; the other one, at right angles, has different and in most cases irrational indices and is referred to as a contact plane but not a twin plane. The crystallographic "law" of simple rational indices states that major planes on crystals, including both faces and twin planes, typically have Miller indices involving small integer values (usually 5 or less). [Extracted from the article] |
| Copyright of Rocks & Minerals is the property of Taylor & Francis Ltd 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 |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 155634317 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A New Study of Twinning in Neptunite. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Richards%2C+R%2E+Peter%22">Richards, R. Peter</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Žorž%2C+Mirjan%22">Žorž, Mirjan</searchLink><relatesTo>2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Rocks+%26+Minerals%22">Rocks & Minerals</searchLink>. Mar2022, Vol. 97 Issue 2, p165-172. 8p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Twin+studies%22">Twin studies</searchLink><br /><searchLink fieldCode="DE" term="%22Right+angle%22">Right angle</searchLink><br /><searchLink fieldCode="DE" term="%22Gems+%26+precious+stones%22">Gems & precious stones</searchLink><br /><searchLink fieldCode="DE" term="%22Twinning+%28Crystallography%29%22">Twinning (Crystallography)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Penetration Twins Penetration twins of the sort seen in neptunite are composed of two individuals that are identical (ideally) and cross at an angle that is determined by the twin law and described by the Miller indices of the twin law. Comparison with figure 11 shows that the correct twin plane is (10 Graph HT <math display="inline" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mover accent="true"><mn>9</mn><mo stretchy="true"></mo></mover></mrow></math> ht ), not (90 Graph HT <math display="inline" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mover accent="true"><mn>2</mn><mo stretchy="true"></mo></mover></mrow></math> ht ). One of these planes is the true twin plane - it has the same Miller indices as the twin law; the other one, at right angles, has different and in most cases irrational indices and is referred to as a contact plane but not a twin plane. The crystallographic "law" of simple rational indices states that major planes on crystals, including both faces and twin planes, typically have Miller indices involving small integer values (usually 5 or less). [Extracted from the article] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Rocks & Minerals is the property of Taylor & Francis Ltd 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: 10.1080/00357529.2022.2004516 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 8 StartPage: 165 Subjects: – SubjectFull: Twin studies Type: general – SubjectFull: Right angle Type: general – SubjectFull: Gems & precious stones Type: general – SubjectFull: Twinning (Crystallography) Type: general Titles: – TitleFull: A New Study of Twinning in Neptunite. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Richards, R. Peter – PersonEntity: Name: NameFull: Žorž, Mirjan IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2022 Type: published Y: 2022 Identifiers: – Type: issn-print Value: 00357529 Numbering: – Type: volume Value: 97 – Type: issue Value: 2 Titles: – TitleFull: Rocks & Minerals Type: main |
| ResultId | 1 |
