Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (16) Citing Articles via Google Scholar Google Scholar Articles by Rocha, J. Articles by Lin, Z. Search for Related Content GeoRef GeoRef Citation

Microporous Mixed Octahedral-Pentahedral-Tetrahedral Framework Silicates

Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal, rocha@dq.ua.pt

The first 20% of the full text of this article appears below.

	INTRODUCTION

 
The frameworks of zeolites and related crystalline microporous oxide materials, such as aluminophosphates, silicoaluminophosphates and metaloaluminophosphates, are built up of tetrahedrally coordinated (e.g., Si, Al, P) atoms. Microporous structures comprised entirely of octahedral sites are also known, encompassing manganese oxides (OMS materials, Suib 1998) and phases with composition Na₂Nb_2–xM_xO_6–x(OH)x•H₂O, where M = Ti, Zr, and 0< x 0.4 (SOMS solids; Nyman et al. 2001, 2002). Mixed octahedral-pentahedral-tetrahedral microporous (OPT) siliceous frameworks have been much studied since the early 1990s (Rocha and Anderson 2000; Anderson and Rocha 2002). Comprehensive research into synthetic OPT materials was initiated by the seminal contributions of Kuznicki (1989, 1990) (titanosilicates ETS-4 and ETS-10), Chapman (1990); Chapman and Roe (1990) (ETS-4, and titanosilicate analogues of minerals vinogradovite and pharmacosiderite) and Anderson et al. (1994, 1995b) (ETS-10), and the early work of the groups of Raveau (Choisnet et al. 1976, 1977) (tantalo and niobosilicates), Corcoran and Vaughan (1989) and Corcoran et al. (1989, 1992) (stannosilicates).

Much research on the synthesis of OPT materials has been inspired and motivated by the many examples of such solids provided by Nature and brought to light by a plethora of mineralogists. As an example, consider the titanosilicate mineral zorite, discovered in 1973 on the Lovozero Tundra (Mer’kov et al. 1973). The structure solution of this mineral was published six years later by Sandomirskii and Belov (1979). Zorite is important because it was one of the first examples of microporous titanosilicates to be prepared in the laboratory (Kuznicki 1989; Chapman 1990; Chapman and Roe 1990). The details of the structure of the synthetic analogue of zorite, known as ETS-4, remained somewhat elusive until a single-crystal x-ray . . . [Full Text of this Article]

This article has been cited by other articles:

				U. Kolitsch, M. Wierzbicka-Wieczorek, and E. Tillmanns CRYSTAL CHEMISTRY AND TOPOLOGY OF TWO FLUX-GROWN YTTRIUM SILICATES, BaKYSi2O7 AND Cs3YSi8O19 Can Mineral, April 1, 2009; 47(2): 421 - 431. [Abstract] [Full Text] [PDF]

				M. Cadoni and G. Ferraris Two new members of the rhodesite mero-plesiotype series close to delhayelite and hydrodelhayelite: synthesis and crystal structure European Journal of Mineralogy, April 1, 2009; 21(2): 485 - 493. [Abstract] [Full Text] [PDF]

				G. Ferraris and A. Gula Polysomatic Aspects of Microporous Minerals - Heterophyllosilicates, Palysepioles and Rhodesite-Related Structures Reviews in Mineralogy and Geochemistry, January 1, 2005; 57(1): 69 - 104. [Full Text] [PDF]

				N. V. Chukanov and I. V. Pekov Heterosilicates with Tetrahedral-Octahedral Frameworks: Mineralogical and Crystal-Chemical Aspects Reviews in Mineralogy and Geochemistry, January 1, 2005; 57(1): 105 - 143. [Full Text] [PDF]

				E. Bonaccorsi and S. Merlino Modular Microporous Minerals: Cancrinite-Davyne Group and C-S-H Phases Reviews in Mineralogy and Geochemistry, January 1, 2005; 57(1): 241 - 290. [Full Text] [PDF]