Natural mordenite (Na1.49K2.80Mg0.04Ca2.05Sr0.05)(Al8.98Si39.13)O96.29.07H2O from Elba, Italy is orthorhombic, space group Cmc21, with a 18.094(1), b 20.516(1), and c 7.524(1) Å; Z = 1. The structure was refined in its hydrated form to Rw = 5.2%. The atom O(8) is not set on an inversion center and the T-O(8)-T angle is not constrained to 180°. The Si/Al distribution is partially ordered, with an enrichment of Al in the tetrahedra of the 4-membered ring. All Ca ions are localized in a 8-coordinated site; K ions alternate with H2O mols. in a 6-coordinated site. At. coordinates are given.
The crystal structure refinement of a natural mordenite / A., Alberti; P., Davoli; Vezzalini, Maria Giovanna. - In: ZEITSCHRIFT FUR KRISTALLOGRAPHIE. - ISSN 0044-2968. - STAMPA. - 175:(1986), pp. 249-256.
The crystal structure refinement of a natural mordenite
VEZZALINI, Maria Giovanna
1986
Abstract
Natural mordenite (Na1.49K2.80Mg0.04Ca2.05Sr0.05)(Al8.98Si39.13)O96.29.07H2O from Elba, Italy is orthorhombic, space group Cmc21, with a 18.094(1), b 20.516(1), and c 7.524(1) Å; Z = 1. The structure was refined in its hydrated form to Rw = 5.2%. The atom O(8) is not set on an inversion center and the T-O(8)-T angle is not constrained to 180°. The Si/Al distribution is partially ordered, with an enrichment of Al in the tetrahedra of the 4-membered ring. All Ca ions are localized in a 8-coordinated site; K ions alternate with H2O mols. in a 6-coordinated site. At. coordinates are given.
Pubblicazioni consigliate
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris
