Charoite, as an example of a structure with natural nanotubes

I. Rozhdestvenskaya, E. Mugnaioli, M. Czank, W. Depmeier, U. Kolb

Research output: Chapter in Book/Report/Conference proceedingChapterResearch

Abstract

Charoite from the Murun massif in Yakutiya, Russia (Vorob’ev 2008) was 5 investigated using automated electron diffraction tomography (ADT) (Kolb et al. 6 2007, 2008; Mugnaioli et al. 2010) and precession electron diffraction (PED) 7 (Mugnaioli et al. 2010, 2009), which allowed to determine the structure of charoite 8 for the first time. The structure was solved ab initio in space group P21/m by 9 direct methods using a fully kinematic approach. The least squares refinements 10 with 2878 reflections F(hkl) >4sF converged to unweighted/weighted residuals 11 R1/wR2 ¼ 0.173/0.21 (Rozhdestvenskaya et al. 2010). 12 The structure of charoite with the crystal chemical formula (K13.88Sr1.0 13 Ba0.32Mn0.36)S15.56 (Ca25.64Na6.36)S32 [(Si6(O11(O,OH)6)2(Si12(O18(O, OH)12)2 14 (Si17(O25(O,OH)18)2](OH,F)4.0·3.18H2O, or, ideally, (K,Sr,Ba,Mn)15–16(Ca, 15 Na)32 [Si70(O,OH)180](OH,F)4.0·nH2O, can be visualized as being composed of 16 three different silicate chains: a dreier double chain, [Si6O17] 17 10", a tubular loop- bran
Original languageEnglish
Title of host publicationMinerals as advanced materials II.
PublisherSpringer Nature
Pages438, 55-60
ISBN (Print)978-3-642-2017-5
DOIs
StatePublished - 2012
Externally publishedYes

Keywords

  • charoite structure
  • tubular radicals

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