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Porous titanosilicate nanorods in the structure of yuksporite, (Sr,Ba) (sub 2) K (sub 4) (Ca,Na) (sub 14) (,Mn,Fe) {(Ti,Nb) (sub 4) (O,OH) (sub 4) [Si (sub 6) O (sub 17) ] (sub 2) [Si (sub 2) O (sub 7) ] (sub 3) }(H (sub 2) O,OH) (sub n) , resolved using synchrotron radiation

Sergey V. Krivovichev, Viktor N. Yakovenchuk, Thomas Armbruster, Nicola Doebelin, Philipp Pattison, Hans-Peter Weber and Wulf Depmeier
Porous titanosilicate nanorods in the structure of yuksporite, (Sr,Ba) (sub 2) K (sub 4) (Ca,Na) (sub 14) (,Mn,Fe) {(Ti,Nb) (sub 4) (O,OH) (sub 4) [Si (sub 6) O (sub 17) ] (sub 2) [Si (sub 2) O (sub 7) ] (sub 3) }(H (sub 2) O,OH) (sub n) , resolved using synchrotron radiation
American Mineralogist (October 2004) 89 (10): 1561-1565

Abstract

The crystal structure of yuksporite, (Sr,Ba) (sub 2) K (sub 4) (Ca, Na) (sub 14) ([], Mn, Fe) {Ti, Nb) (sub 4) (O, OH) (sub 4) [Si (sub 6) O (sub 17) ] (sub 2) [Si (sub 2) O (sub 7) ] (sub 3) }(H (sub 2) O, OH) (sub n) , where n approximately 3 [monoclinic, P2 (sub 1) /m, a = 7.126(3), b = 24.913(6), c = 17.075(7) Aa, beta = 101.89(3) degrees , V = 2966.4(17) Aa (super 3) ] has been solved using X-ray synchrotron radiation data collected from a needle-like crystal with dimensions of 6X6X50 mu m (super 3) at the Swiss-Norwegian beamline BM01 of the European Synchrotron Research Facility (NSRF, Grenoble, France). The structure was refined to R (sub 1) = 0.101 on the basis of 2359 unique observed reflections with F (sub o) > or = 4sigma (sub f) . The structure of yuksporite is based upon titanosilicate nanorods elongated along a and with an elliptical cross-section of ca. 16X19 Aa = 1.6X1.9 nm. Silicate tetrahedra form double xonotlite-like chains (super 1) infinity[Si (sub 6) O (sub 17) ] oriented parallel to (001). Two (super 1) infinity[Si (sub 6) O (sub 17) ] chains are linked into a rod via TiO (sub 6) octahedra and Si (sub 2) O (sub 7) double tetrahedra. The {(Ti, Nb) (sub 4) (O, OH) (sub 4) [Si (sub 6) O (sub 17) ] (sub 2) [Si (sub 2) O (sub 7) ] (sub 3) } nanorods are porous. The internal pores are defined by eight-membered rings (8MR) with open diameters of 3.2 Aa. The interior of the titanosilicate nanorods is occupied by Sr, Ba, K, and Na cations and H (sub 2) O molecules. The nanorods are separated by walls of Ca coordination polyhedra that are parallel to (010) and link the rods into a three-dimensional structure.


ISSN: 0003-004X
EISSN: 1945-3027
Coden: AMMIAY
Serial Title: American Mineralogist
Serial Volume: 89
Serial Issue: 10
Title: Porous titanosilicate nanorods in the structure of yuksporite, (Sr,Ba) (sub 2) K (sub 4) (Ca,Na) (sub 14) (,Mn,Fe) {(Ti,Nb) (sub 4) (O,OH) (sub 4) [Si (sub 6) O (sub 17) ] (sub 2) [Si (sub 2) O (sub 7) ] (sub 3) }(H (sub 2) O,OH) (sub n) , resolved using synchrotron radiation
Affiliation: Saint Petersburg State University, Department of Crystallography, Saint Petersburg, Russian Federation
Pages: 1561-1565
Published: 200410
Text Language: English
Publisher: Mineralogical Society of America, Washington, DC, United States
References: 32
Accession Number: 2005-004596
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Secondary Affiliation: Russian Academy of Sciences, RUS, Russian FederationUniversitaet Bern, CHE, SwitzerlandEuropean Synchrotron Radiation Facility, FRA, FranceUniversity of Lausanne, CHE, SwitzerlandKiel Universitaet, DEU, Federal Republic of Germany
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 200502
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