A New Mineral Ferrisanidine, K[Fe3+Si3O8], the First Natural Feldspar with Species-Defining Iron
Ferrisanidine, K[Fe3+Si3O8], the first natural feldspar with species-defining iron, is an analogue of sanidine bearing Fe3+ instead of Al. It was found in exhalations of the active Arsenatnaya fumarole at the Second scoria cone of the Northern Breakthrough of the Great Fissure Tolbachik Eruption, To...
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ftmdpi:oai:mdpi.com:/2075-163X/9/12/770/ 2023-08-20T04:07:40+02:00 A New Mineral Ferrisanidine, K[Fe3+Si3O8], the First Natural Feldspar with Species-Defining Iron Nadezhda Shchipalkina Igor Pekov Sergey Britvin Natalia Koshlyakova Marina Vigasina Evgeny Sidorov agris 2019-12-11 application/pdf https://doi.org/10.3390/min9120770 EN eng Multidisciplinary Digital Publishing Institute Crystallography and Physical Chemistry of Minerals & Nanominerals https://dx.doi.org/10.3390/min9120770 https://creativecommons.org/licenses/by/4.0/ Minerals; Volume 9; Issue 12; Pages: 770 ferrisanidine new mineral sanidine feldspar group iron in feldspar crystal structure fumarole Tolbachik volcano Kamchatka Text 2019 ftmdpi https://doi.org/10.3390/min9120770 2023-07-31T22:53:15Z Ferrisanidine, K[Fe3+Si3O8], the first natural feldspar with species-defining iron, is an analogue of sanidine bearing Fe3+ instead of Al. It was found in exhalations of the active Arsenatnaya fumarole at the Second scoria cone of the Northern Breakthrough of the Great Fissure Tolbachik Eruption, Tolbachik volcano, Kamchatka Peninsula, Russia. The associated minerals are aegirine, cassiterite, hematite, sylvite, halite, johillerite, arsmirandite, axelite, aphthitalite. Ferrisanidine forms porous crusts composed by cavernous short prismatic crystals or irregular grains up to 10 μm × 20 μm. Ferrisanidine is transparent, colorless to white, the lustre is vitreous. Dcalc is 2.722 g·cm−3. The chemical composition of ferrisanidine (wt. %, electron microprobe) is: Na2O 0.25, K2O 15.15, Al2O3 0.27, Fe2O3 24.92, SiO2 60.50, in total 101.09. The empirical formula calculated based on 8 O apfu is (K0.97Na0.03)Ʃ1.00(Si3.03Fe3+0.94Al0.02)Ʃ3.99O8. The crystal structure of ferrisanidine was studied using the Rietveld method, the final R indices are: Rp = 0.0053, Rwp = 0.0075, R1 = 0.0536. Parameters of the monoclinic unit cell are: a = 8.678(4), b = 13.144(8), c = 7.337(5) Å, β = 116.39(8)°, V = 749.6(9) Å3. Space group is C2/m. The crystal structure of ferrisanidine is based on the sanidine-type “ferrisilicate” framework formed by disordered [SiO4] and [Fe3+O4] tetrahedra. Text Kamchatka Kamchatka Peninsula MDPI Open Access Publishing Kamchatka Peninsula ENVELOPE(160.000,160.000,56.000,56.000) Tolbachik ENVELOPE(159.960,159.960,55.537,55.537) Minerals 9 12 770 |
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English |
topic |
ferrisanidine new mineral sanidine feldspar group iron in feldspar crystal structure fumarole Tolbachik volcano Kamchatka |
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ferrisanidine new mineral sanidine feldspar group iron in feldspar crystal structure fumarole Tolbachik volcano Kamchatka Nadezhda Shchipalkina Igor Pekov Sergey Britvin Natalia Koshlyakova Marina Vigasina Evgeny Sidorov A New Mineral Ferrisanidine, K[Fe3+Si3O8], the First Natural Feldspar with Species-Defining Iron |
topic_facet |
ferrisanidine new mineral sanidine feldspar group iron in feldspar crystal structure fumarole Tolbachik volcano Kamchatka |
description |
Ferrisanidine, K[Fe3+Si3O8], the first natural feldspar with species-defining iron, is an analogue of sanidine bearing Fe3+ instead of Al. It was found in exhalations of the active Arsenatnaya fumarole at the Second scoria cone of the Northern Breakthrough of the Great Fissure Tolbachik Eruption, Tolbachik volcano, Kamchatka Peninsula, Russia. The associated minerals are aegirine, cassiterite, hematite, sylvite, halite, johillerite, arsmirandite, axelite, aphthitalite. Ferrisanidine forms porous crusts composed by cavernous short prismatic crystals or irregular grains up to 10 μm × 20 μm. Ferrisanidine is transparent, colorless to white, the lustre is vitreous. Dcalc is 2.722 g·cm−3. The chemical composition of ferrisanidine (wt. %, electron microprobe) is: Na2O 0.25, K2O 15.15, Al2O3 0.27, Fe2O3 24.92, SiO2 60.50, in total 101.09. The empirical formula calculated based on 8 O apfu is (K0.97Na0.03)Ʃ1.00(Si3.03Fe3+0.94Al0.02)Ʃ3.99O8. The crystal structure of ferrisanidine was studied using the Rietveld method, the final R indices are: Rp = 0.0053, Rwp = 0.0075, R1 = 0.0536. Parameters of the monoclinic unit cell are: a = 8.678(4), b = 13.144(8), c = 7.337(5) Å, β = 116.39(8)°, V = 749.6(9) Å3. Space group is C2/m. The crystal structure of ferrisanidine is based on the sanidine-type “ferrisilicate” framework formed by disordered [SiO4] and [Fe3+O4] tetrahedra. |
format |
Text |
author |
Nadezhda Shchipalkina Igor Pekov Sergey Britvin Natalia Koshlyakova Marina Vigasina Evgeny Sidorov |
author_facet |
Nadezhda Shchipalkina Igor Pekov Sergey Britvin Natalia Koshlyakova Marina Vigasina Evgeny Sidorov |
author_sort |
Nadezhda Shchipalkina |
title |
A New Mineral Ferrisanidine, K[Fe3+Si3O8], the First Natural Feldspar with Species-Defining Iron |
title_short |
A New Mineral Ferrisanidine, K[Fe3+Si3O8], the First Natural Feldspar with Species-Defining Iron |
title_full |
A New Mineral Ferrisanidine, K[Fe3+Si3O8], the First Natural Feldspar with Species-Defining Iron |
title_fullStr |
A New Mineral Ferrisanidine, K[Fe3+Si3O8], the First Natural Feldspar with Species-Defining Iron |
title_full_unstemmed |
A New Mineral Ferrisanidine, K[Fe3+Si3O8], the First Natural Feldspar with Species-Defining Iron |
title_sort |
new mineral ferrisanidine, k[fe3+si3o8], the first natural feldspar with species-defining iron |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2019 |
url |
https://doi.org/10.3390/min9120770 |
op_coverage |
agris |
long_lat |
ENVELOPE(160.000,160.000,56.000,56.000) ENVELOPE(159.960,159.960,55.537,55.537) |
geographic |
Kamchatka Peninsula Tolbachik |
geographic_facet |
Kamchatka Peninsula Tolbachik |
genre |
Kamchatka Kamchatka Peninsula |
genre_facet |
Kamchatka Kamchatka Peninsula |
op_source |
Minerals; Volume 9; Issue 12; Pages: 770 |
op_relation |
Crystallography and Physical Chemistry of Minerals & Nanominerals https://dx.doi.org/10.3390/min9120770 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/min9120770 |
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Minerals |
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9 |
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12 |
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770 |
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1774719466028924928 |