Research output: Contribution to journal › Article › peer-review
Tiettaite K4Na12Fe3+Si16O41(OH)4 ⋅ 2H2O : A Mineral with a Novel Type of Microporous Heteropolyhedral Framework. / Panikorovskii, T. L.; Pekov, I. V.; Krzhizhanovskaya, M. G.; Yakovenchuk, V. N.; Britvin, S. N.; Gurzhiy, V. V.; Bocharov, V. N.; Yapaskurt, V. O.; Krivovichev, S. V.
In: Crystallography Reports, Vol. 66, No. 1, 25.02.2021, p. 76-85.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Tiettaite K4Na12Fe3+Si16O41(OH)4 ⋅ 2H2O
T2 - A Mineral with a Novel Type of Microporous Heteropolyhedral Framework
AU - Panikorovskii, T. L.
AU - Pekov, I. V.
AU - Krzhizhanovskaya, M. G.
AU - Yakovenchuk, V. N.
AU - Britvin, S. N.
AU - Gurzhiy, V. V.
AU - Bocharov, V. N.
AU - Yapaskurt, V. O.
AU - Krivovichev, S. V.
N1 - Funding Information: This study was supported by the Russian Foundation for Basic Research, project no. 18-29-12039 (in the part concerning Raman spectroscopy and X-ray diffraction analysis) and no. 18-29-12007 (investigation of the tiettaite chemical composition). Publisher Copyright: © 2021, Pleiades Publishing, Inc. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/2/25
Y1 - 2021/2/25
N2 - Abstract: Microporous silicate tiettaite from the Khibiny alkaline massif (Kola Peninsula, Russia) has been studied using X-ray diffraction analysis, electron probe microanalysis, and Raman spectroscopy of single crystals and powders. Its chemical formula is refined to be K4Na12Fe3+Si16O41(OH)4⋅ 2H2O. The Raman spectrum of tiettaite contains lines at 3650, 3450, 1097, 1066, 980, 920, 681, 635, 569, 499, 458, 404, 272, 144 cm–1. The orthorhombic unit-cell parameters are a = 28.866(7) Å, b = 10.707(3) Å, c = 17.425(7) Å, V = 5385(3) Å3, Z = 4, sp. gr. Cmcm. The tiettaite crystal structure has been solved for the first time from single crystal and refined by the Rietveld method to the final Rwp = 2.47% and RBragg = 1.38%. The structure based on a new-type microporous heteropolyhedral framework formed by one-dimensional modules [Si28Na16Fe4K4O110]76– elongated along the c axis. Each module consists of complex ribbons with compositions of [Si14O39]22– and [Fe2K2Na6O32]50– compose a framework via shared vertices of half-occupied silicon–oxygen tetrahedra Si5 and Si6. Tiettaite structure contains a three-dimensional system of crossed channels with effective channel widths of 2.61 × 7.50, 2.46 × 2.92, and 3.60 × 3.90 Å2, running along the [100], [010], and [001] directions, respectively. The presence of a system of broad channels allows one to consider tiettaite as promising ion exchanger. Regarding the information complexity parameters, tiettaite can be assigned to minerals with very complex structure.
AB - Abstract: Microporous silicate tiettaite from the Khibiny alkaline massif (Kola Peninsula, Russia) has been studied using X-ray diffraction analysis, electron probe microanalysis, and Raman spectroscopy of single crystals and powders. Its chemical formula is refined to be K4Na12Fe3+Si16O41(OH)4⋅ 2H2O. The Raman spectrum of tiettaite contains lines at 3650, 3450, 1097, 1066, 980, 920, 681, 635, 569, 499, 458, 404, 272, 144 cm–1. The orthorhombic unit-cell parameters are a = 28.866(7) Å, b = 10.707(3) Å, c = 17.425(7) Å, V = 5385(3) Å3, Z = 4, sp. gr. Cmcm. The tiettaite crystal structure has been solved for the first time from single crystal and refined by the Rietveld method to the final Rwp = 2.47% and RBragg = 1.38%. The structure based on a new-type microporous heteropolyhedral framework formed by one-dimensional modules [Si28Na16Fe4K4O110]76– elongated along the c axis. Each module consists of complex ribbons with compositions of [Si14O39]22– and [Fe2K2Na6O32]50– compose a framework via shared vertices of half-occupied silicon–oxygen tetrahedra Si5 and Si6. Tiettaite structure contains a three-dimensional system of crossed channels with effective channel widths of 2.61 × 7.50, 2.46 × 2.92, and 3.60 × 3.90 Å2, running along the [100], [010], and [001] directions, respectively. The presence of a system of broad channels allows one to consider tiettaite as promising ion exchanger. Regarding the information complexity parameters, tiettaite can be assigned to minerals with very complex structure.
UR - http://www.scopus.com/inward/record.url?scp=85101741901&partnerID=8YFLogxK
U2 - 10.1134/S1063774521010120
DO - 10.1134/S1063774521010120
M3 - Article
AN - SCOPUS:85101741901
VL - 66
SP - 76
EP - 85
JO - Crystallography Reports
JF - Crystallography Reports
SN - 1063-7745
IS - 1
ER -
ID: 75305899