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Ba 2 PO 4 I, Sr 2 PO 4 I, and Pb 2 PO 4 I – A New Structure Type and Three of Its Representatives
Author(s) -
Haberkorn Robert,
Bauer Jessica,
Kickelbick Guido
Publication year - 2014
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201400221
Subject(s) - crystal structure , crystallite , crystallography , structure type , rietveld refinement , chemistry , solid state , annealing (glass) , x ray crystallography , analytical chemistry (journal) , mineralogy , materials science , diffraction , physics , metallurgy , chromatography , optics
The compound Pb 2 PO 4 I was synthesized via a solid state reaction under inert conditions. None of the known structure types of other compounds of the type M 2 (P,V,As,Cr)O 4 (F,Cl,Br,I) provided a similar pattern. Structure solution was carried out by evaluation of an X‐ray diffractogram of polycrystalline powder using the methods simulated annealing and difference Fourier. Pb 2 PO 4 I crystallizes in the space group P 2 1 / c with the lattice parameters a = 9.0451(1) Å, b = 8.7593(1) Å, c = 8.5740(1) Å, and β = 111.128(1)°. The isotypic compounds Sr 2 PO 4 I and Ba 2 PO 4 I were synthesized, too. Their crystallographic structure was refined by Rietveld analysis. The structure of the three compounds is described and discussed.