Titre du document / Document title

Synthesis of novel lead-molybdenum and lead-tungsten oxyhalides with the pinalite structure, Pb₃MoO₅Cl₂ and Pb₃WO₅Br₂

Auteur(s) / Author(s)

CHARKIN Dmitri O. ; LIGHTFOOT Philip ;

Résumé / Abstract

Two new quaternary lead oxyhalides, Pb₃MoO₅Cl₂ and Pb₃WO₅Br₂, have been prepared. They are isostructural with the mineral pinalite, Pb₃WO₅Cl₂, and its barium analog. The crystal structure of Pb₃MoO₅Cl₂ has been refined from powder neutron diffraction data to R_P = 0.0564 and R_wp = 0.0342. All these structures contain significantly stretched MO₅ (M = Mo, W) square pyramids incorporated into the [Pb₂O₂] sheets. Bond valence sums indicate significant overbonding of one of the metal sites, which increases along with structural distortions when passing from Pb₃MoO₅Cl₂ to Pb₃WO₅Cl₂ and from Pb₅WO₅Cl₂ to Ba₅WO₅Cl₂. Possibilities of preparing isostructural and structurally related compounds are discussed.

Revue / Journal Title

The American mineralogist   ISSN 0003-004X   CODEN AMMIAY 

Source / Source

2006, vol. 91, n^o11-12, pp. 1918-1921 [4 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

Mineralogical Society of America, Washington, DC, ETATS-UNIS  (1916) (Revue)

Localisation / Location

INIST-CNRS, Cote INIST : 503, 35400015901680.0230