Disorder and compositional variation in the lillianite homologous series
ABSTRACT I ttigh resolution transmission electron microscopy studies on the lillianite group minerals from the Ivigtul cryolite deposit, Ivigtut, South Greenland revealed the existence of disordered intergrowths of lillianite/gustavite-like blocks (N- 4) and beyrovskyite-like (N = 7) structural bloc...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.604.8555 2023-05-15T16:27:41+02:00 Disorder and compositional variation in the lillianite homologous series A. Eking M. Jerctlfr L The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.604.8555 http://www.minersoc.org/pages/Archive-MM/Volume_63/63-6-917.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.604.8555 http://www.minersoc.org/pages/Archive-MM/Volume_63/63-6-917.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.minersoc.org/pages/Archive-MM/Volume_63/63-6-917.pdf disorder IIRTEM lvigtut Greenland text ftciteseerx 2016-01-08T14:12:22Z ABSTRACT I ttigh resolution transmission electron microscopy studies on the lillianite group minerals from the Ivigtul cryolite deposit, Ivigtut, South Greenland revealed the existence of disordered intergrowths of lillianite/gustavite-like blocks (N- 4) and beyrovskyite-like (N = 7) structural blocks. One disorder sequence is examined in detail, which gave an average homologue number N = 4.92 corresponding to a composition of Pb:~.92 x Bi2, ~Ag,$6.92 with x ~ 1,2. An Axial Next-Nearest Neighour lsing modcl was used to follow the fluctuations in the average homologue number N across the crystal. This yielded compositional fluctuations of the order of 70-- 170 A over a 1800 A region of the crystal, with a 202 A lamella of ordered vikingite. Trends in the randomness of the gustavite-vikingite ntergrowth were evaluated and the dominant slab sequence was found to be 4,4,4,7 and 4,4,7,7, suggesting that some longer period homologues may be stable. A number of defects were noted in which changes in slab widths were accommodated. The origin of these partially ordered/disordered lillianite homologues i discussed. Text Greenland Unknown Greenland |
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disorder IIRTEM lvigtut Greenland |
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disorder IIRTEM lvigtut Greenland A. Eking M. Jerctlfr L Disorder and compositional variation in the lillianite homologous series |
topic_facet |
disorder IIRTEM lvigtut Greenland |
description |
ABSTRACT I ttigh resolution transmission electron microscopy studies on the lillianite group minerals from the Ivigtul cryolite deposit, Ivigtut, South Greenland revealed the existence of disordered intergrowths of lillianite/gustavite-like blocks (N- 4) and beyrovskyite-like (N = 7) structural blocks. One disorder sequence is examined in detail, which gave an average homologue number N = 4.92 corresponding to a composition of Pb:~.92 x Bi2, ~Ag,$6.92 with x ~ 1,2. An Axial Next-Nearest Neighour lsing modcl was used to follow the fluctuations in the average homologue number N across the crystal. This yielded compositional fluctuations of the order of 70-- 170 A over a 1800 A region of the crystal, with a 202 A lamella of ordered vikingite. Trends in the randomness of the gustavite-vikingite ntergrowth were evaluated and the dominant slab sequence was found to be 4,4,4,7 and 4,4,7,7, suggesting that some longer period homologues may be stable. A number of defects were noted in which changes in slab widths were accommodated. The origin of these partially ordered/disordered lillianite homologues i discussed. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
A. Eking M. Jerctlfr L |
author_facet |
A. Eking M. Jerctlfr L |
author_sort |
A. Eking |
title |
Disorder and compositional variation in the lillianite homologous series |
title_short |
Disorder and compositional variation in the lillianite homologous series |
title_full |
Disorder and compositional variation in the lillianite homologous series |
title_fullStr |
Disorder and compositional variation in the lillianite homologous series |
title_full_unstemmed |
Disorder and compositional variation in the lillianite homologous series |
title_sort |
disorder and compositional variation in the lillianite homologous series |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.604.8555 http://www.minersoc.org/pages/Archive-MM/Volume_63/63-6-917.pdf |
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Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
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http://www.minersoc.org/pages/Archive-MM/Volume_63/63-6-917.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.604.8555 http://www.minersoc.org/pages/Archive-MM/Volume_63/63-6-917.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766017143431757824 |