| Reference Type | Journal (article/letter/editorial) |
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| Title | Alkali Sulfates with Aphthitalite-Like Structures from Fumaroles of the Tolbachik Volcano, Kamchatka, Russia. IV. Aphthitalite–Palmierite Regular Intergrowths: Crystallography, Chemistry, and Genesis |
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| Journal | The Canadian Journal of Mineralogy and Petrology | ISSN | 1499-1276 |
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| Authors | Shchipalkina, Nadezhda V. | Author |
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| Koshlyakova, Natalia N. | Author |
| Pekov, Igor V. | Author |
| Agakhanov, Atali A. | Author |
| Britvin, Sergey N. | Author |
| Nazarova, Maria A. | Author |
| Year | 2023 (May 1) | Volume | 61 |
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| Page(s) | 609-622 | Issue | 3 |
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| Publisher | Mineralogical Association of Canada |
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| URL | |
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| DOI | doi:10.3749/2200062Search in ResearchGate |
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| Generate Citation Formats |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 18655679 | Long-form Identifier | mindat:1:5:18655679:1 |
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| GUID | 0 |
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| Full Reference | Shchipalkina, Nadezhda V.; Koshlyakova, Natalia N.; Pekov, Igor V.; Agakhanov, Atali A.; Britvin, Sergey N.; Nazarova, Maria A. (2023) Alkali Sulfates with Aphthitalite-Like Structures from Fumaroles of the Tolbachik Volcano, Kamchatka, Russia. IV. Aphthitalite–Palmierite Regular Intergrowths: Crystallography, Chemistry, and Genesis. The Canadian Journal of Mineralogy and Petrology, 61 (3). 609-622 doi:10.3749/2200062 |
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| Plain Text | Shchipalkina, Nadezhda V.; Koshlyakova, Natalia N.; Pekov, Igor V.; Agakhanov, Atali A.; Britvin, Sergey N.; Nazarova, Maria A. (2023) Alkali Sulfates with Aphthitalite-Like Structures from Fumaroles of the Tolbachik Volcano, Kamchatka, Russia. IV. Aphthitalite–Palmierite Regular Intergrowths: Crystallography, Chemistry, and Genesis. The Canadian Journal of Mineralogy and Petrology, 61 (3). 609-622 doi:10.3749/2200062 |
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| In | (2023, May) The Canadian Journal of Mineralogy and Petrology Vol. 61 (3). Mineralogical Association of Canada |
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| Abstract/Notes | Abstract
The first discovery of regular intergrowths of aphthitalite K3Na(SO4)2 and palmierite K2Pb(SO4)2 are reported. Crystals of aphthitalite, intergrown with lamellae of palmierite (up to 15 μm thick), along with grains of arcanite, occur in encrustations recovered from the active Arsenatnaya fumarole (Tolbachik volcano, Kamchatka, Russia). These were studied using a combination of scanning electron microscopy, electron probe microanalysis, powder X-ray diffraction, and electron backscatter diffraction techniques. Three types of grain boundaries involving intergrowths of aphthitalite and palmierite were observed: (1) those with a misorientation angle of 60° relative to [001] (twinning), (2) those parallel to the (001) plane, and (3) those with a misorientation angle of 60° relative to [001]. The twinned aphthitalite domains are related by a two-fold rotation about [001] (Dauphiné twin law). The heating of aphthitalite crystals containing palmierite lamellae at 400, 600, and 750 °C shows a nearly complete redistribution and gradual dissolution of palmierite in the aphthitalite matrix. The character of solid-state transformations in the K2SO4–Na2SO4–PbSO4 system during cooling is controlled by the structural similarity of aphthitalite-type sulfates and palmierite, which contain topologically identical 2[M(SO4)2] (M = Na, Pb) layers. |
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