...Zhi LIN; João ROCHA Abstract The small-pore framework stannosilicate Na 2 SnSi 4 O 11 .2H 2 O (Sn-AM-3), exhibiting the structure-type of the rare mineral penkvilksite-2 O , has been synthesized via a seeded hydrothermal process. The estimated cell dimensions are: a = 16.52, b = 8.80, c = 7.48 Å...

...Figure 5. (a,b) Polyhedral representation of the structure of stannosilicate AV-10; (c) the helix chains of SiO 4 tetrahedra in AV-10. Dark SnO 6 octahedra, light grey SiO 4 tetrahedra. Cations and water molecules are omitted for clarity. ...

... . Janiszewska , E. , Kowalak , S. , Supronowicz , W. , and Roessner , F. ( 2009 ) Synthesis and properties of stannosilicates . Microporous and Mesoporous Materials , 117 , 423 – 430 . Kim , M.H. , Ko , Y. , Kim , S.J. , and Uh , Y.S. ( 2001 ) Vapor phase Beckmann...

... . Janiszewska E. Kowalak S. Supronowicz W. Roessner F. ( 2009 ) Synthesis and properties of stannosilicates . Microporous and Mesoporous Materials , 117 , 423 – 430 . Khouw C.B. Davis M.E. ( 1995 ) Catalytic activity of titanium silicates synthesized in the presence of alkali...

... of the synthetic titanosilicate ETS–10; Zhao et al . 2003 ). Although substantial research efforts have been devoted to mixed (tetrahedral–octahedral) framework titanosilicates (as well as the similarly behaving zircono- and stannosilicates), mixed-framework silicates with M 3+ O 6 octahedra only have been...

... ] . Inorganic Chemistry 48 , 8357 – 8361 . Liao C.H. Chang P.C. Kao H.M. Lii K.H. ( 2005 ) Synthesis, crystal structure, and solid-state NMR spectroscopy of a salt-inclusion stannosilicate: [Na 3 F][SnSi 3 O 9 ] . Inorganic Chemistry 44 , 9335 – 9339 . Mandarino J.A...

..., high-pressure hydrothermal synthesis and characterization of a new framework stannosilicate: Cs 2 SnSi 3 O 9 . Journal of Solid State Chemistry , 178 , 1017 – 1022 . Makarova , T.A. , Stavitskaya , G.P. and Pivovarova , L.N. ( 1978 ) Synthesis and physicochemical study...

... of microporous framework zirconium silicates . Journal of Physical Chemistry , B103 , 957 – 963 . Lin , Z. , Rocha , J. and Valente , A. ( 1999b ) Synthesis and characterisation of a framework microporous stannosilicate . Chemical Communications , 1999 , 2489 – 2490 . Maksimov...

... , Lopes M , Fernandez C ( 2001b ) Ab initio structure determination of a small-pore framework sodium stannosilicate . Inorg Chem 40 : 3330 – 3335 Ferreira A , Lin Z , Soares MR , Rocha J ( 2004 ) Synthesis and ab initio structure determination from powder...

... of their lower charge and high ionic radii). The same topology was observed in all naturally occurring stannosilicates, including malayaite, pabstite, vistepite, tumchaite, sørensenite or brannockite, in which a variety of network modifiers are encountered (Na, K, Ca, Mn). Naski & Hess (1985...