Extraordinary structural complexity of ilmajokite: a multilevel hierarchical framework structure of natural origin
作者: Andrey A. ZolotarevSergey V. KrivovichevFernando CÁmaraLuca BindiElena S. ZhitovaFrank HawthorneElena Sokolova
作者单位: 1Department of Crystallography, St Petersburg State University, University Emb. 7/9, St Petersburg 199034, Russian Federation
2Dipartimento di Scienze della Terra, Unversità di Milano, via Mangiagalli 34, Milano I-20133, Italy
3Dipartimento di Scienze della Terra, Università degli Studi di Firenze, Firenze I-50121, Italy
4Department of Geological Sciences, University of Manitoba, Winnipeg, Manitoba R3T2N2 Canada
刊名: IUCrJ, 2020, Vol.7 (Pt 1), pp.121-128
来源数据库: International Union of Crystallography
DOI: 10.1107/S2052252519016622
关键词: IlmajokiteTitanosilicatesStructural hierarchyStructural complexityRussian Science Foundation19-17-00038
原始语种摘要: The crystal structure of ilmajokite, a rare Na-K-Ba-Ce-titanosilicate from the Khibiny mountains, Kola peninsula, Russia, has been solved using single-crystal X-ray diffraction data. The crystal structure is based on a 3D titanosilicate framework consisting of trigonal prismatic titanosilicate (TPTS) clusters centered by Ce3+ in [9]-coordination. Four adjacent TPTS clusters are linked into four-membered rings within the (010) plane and connected via ribbons parallel to 101. The ribbons are organized into layers parallel to (010) and modulated along the a axis with a modulation wavelength of csinΒ = 32.91 å and an amplitude of ∼b/2 = 13.89 å. The layers are linked by additional silicate tetrahedra. Na+, K+, Ba2+ and H 2 O groups occur in the framework cavities and have...
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  • hierarchical 分级
  • framework 构架
  • complexity 错综性
  • structure 构造
  • multilevel 多级
  • coordination 配位
  • Russia 俄罗斯牌手表
  • crystal 晶体
  • structural 构造
  • layers