Hostname: page-component-74656f9884-8r8nv Total loading time: 0 Render date: 2026-11-08T15:42:51.743Z Has data issue: false hasContentIssue false
  • English
  • Français

The structure of reyerite, (Na,K)2Ca14Si22Al2O58(OH)8.6H2O

Published online by Cambridge University Press:  05 July 2018

Stefano Merlino
Stefano Merlino*
Affiliation:
Dipartimento di Scienze della Terra, Università di Pisa, Via S. Maria 53, 56100 Pisa, Italy
Get access Rights & Permissions [Opens in a new window]

Abstract

The crystal structure of reyerite, (Na,K)2Ca14Si22Al2O58(OH)8.6H2O, Z = 1, was refined in the space group P, a = 9.765, c = 19.067Å, to R = 0.064 for 1540 reflections. The structure is composed of the following structural units: (a) tetrahedral sheets S 1, with composition (Si8O20)8−, characterized by six-membered rings of tetrahedra; (b) tetrahedral sheets S 2, characterized by six-membered rings of tetrahedra, with six tetrahedra pointing in one direction and two pointing in the other direction—the apical oxygens of these two tetrahedra connect two inversion-related S 2 sheets to build double sheets, with composition (Si14Al2O38)14− and ordered distribution of aluminum cations; (c) sheets O of edge-sharing calcium octahedra. The various structural units are connected through corner sharing according to the schematic sequence ……; the corresponding composition is [Ca14Si22Al2O58(OH)8]2−. The charge balance is restored by alkali cations which are placed, together with water molecules, in the cavities of the structure at the level of the double tetrahedral sheet.

Keywords

reyeritecrystal structurecalcium silicatesNiakornakGreenland

Information

Type
Crystallograhy
Information
Mineralogical Magazine , Volume 52 , Issue 365 , April 1988 , pp. 247 - 255
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1988

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

Bøggild, O.B. (1908) Medd. Grcnland, 34,91.Google Scholar
Cann, J.R. (1965) Mineral. Mag. 35, 1.Google Scholar
Chalmers, R.A., Farmer, V.C., Harker, R.I., Kelly, S. and Taylor, H.F. W. (1964) Ibid. 33, 821.Google Scholar
Chandler, J.A. (1973) J. Microscopy, 98,359.CrossRefGoogle Scholar
Clement, S.C. and Ribbe, P.H. (1973) Am. Mineral. 58, 517.Google Scholar
Cornu, F. and Hirnmelbauer, A. (1906) Tschermaks Mineral. Petrogr. Mitt. 25, 519.Google Scholar
International Tables for X-ray Crystallography (1974) Vol. IV. Birmingham: Kynoch Press.Google Scholar
Lachowski, E.E., Murray, L.W. and Taylor, H.F. W. (1979) Mineral. Mag. 43, 333.CrossRefGoogle Scholar
Mamedov, Kh.S. and Belov, N.V. (1958) Dokl. Akad. NaukSSSR, 121, 720.Google Scholar
Merlino, S. (1972) Nature Physical Science, 238, 124.CrossRefGoogle Scholar
Merlino, S. (1988) Mineral. Mag. 52 (in press).Google Scholar
Meyer, J.W. and Jaunarajs, J.L. (1961) Am. Mineral. 46, 913.Google Scholar
Rinaldi, R. (1981) In Microscopiaelettronicaascansione (Armigliato, A. and Valdr6, U., eds.) Lab. di Micr. Elettr., Univ. di Bologna.Google Scholar
Sheldriek, G.M. (1976) SHELX 76. A program for crystal structure determination. Univ. of Cambridge, England.Google Scholar
Strunz, H. and Micheelsen, H. (1958) Naturwiss. 45, 515.CrossRefGoogle Scholar
Zoltai, T. (1960) Am. Mineral. 45, 960.Google Scholar

A correction has been issued for this article:

Errata