Crystal Chemistry of Minerals and Inorganic Compounds with Lavendulan Clusters. II. New Compound Na2+xCu5(PO4)3(PO3+x(OH)1-x)Cl (x ~ 0.175) and Features of the Vertical Linkage of Lavendulan Clusters

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Resumo

The new compound Na2+xCu5(PO4)3(PO3+x(OH)1-x)Cl (x ~ 0.175) is obtained by chemical transport reactions. The crystal structure at 100 K (orthorhombic, Cmce, a = 13.6341(2), b = 13.8802(2), c = 15.5183(3) Å, V = 2936.74(8) Å3, Z = 8) was solved by direct methods and refined to R1 = 0.022. The compound Na2+xCu5(PO4)3(PO3+x(OH)1-x)Cl (x ~ 0.175) is a representative of a new structure type of inorganic compounds. Lavendulan clusters of the composition [Cu5(PO4)8Cl] in its structure are combined into layers parallel to the (001) plane. The layers unite with each other by means of an edge-mirror linkage, resulting in the formation of a dense heteropolyhedral framework with voids occupied by Na+ cations. The new linkage type is the first example of edge-mirror linkage of lavendulan clusters, as opposed to the vertex-mirror and translational linkage types.

Sobre autores

I. Kornyakov

Nanomaterials Research Centre, Kola Science Centre, RAS; Saint Petersburg State University

Apatity, Russia; Saint Petersburg, Russia

S. Krivovichev

Nanomaterials Research Centre, Kola Science Centre, RAS; Saint Petersburg State University

Email: s.krivovichev@ksc.ru
Apatity, Russia; Saint Petersburg, Russia

A. Kasatkin

Fersman Mineralogical Museum RAS

Moscow, Russia

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