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A New Type of Anionic Framework in Microporous Potassium Iron(II) Phosphate K[Fe(PO 4 )]
Author(s) -
Yakubovich Olga V.,
Massa Werner,
Dimitrova Olga V.
Publication year - 2005
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.200500262
Subject(s) - crystallography , microporous material , hydrothermal synthesis , potassium , tetrahedron , crystal structure , chemistry , trigonal bipyramidal molecular geometry , hydrothermal circulation , coordination number , ion , bipyramid , geology , organic chemistry , seismology
Abstract A new iron(II) orthophosphate K[Fe(PO 4 )] has been obtained by hydrothermal synthesis and its crystal structure was determined by single‐crystal X‐ray diffraction: space group P 2 1 / n , Z = 8, a = 9.6199(10), b = 8.6756(8), c = 10.8996(13) Å, β = 115.577(8)° at 193 K, R = 0.023. Fe II shows coordination numbers (CN) 4 (distorted tetrahedral) and CN 5 (distorted trigonal bipyramidal). The [FeO 4 ] and [FeO 5 ] units form together with the [PO 4 ] tetrahedra a microporous 3D para‐framework with open channels along the a and b directions. The potassium ions positioned in the channels show CN 7 and 8. The structural relations within the morphotropic row of non‐isotypic K[ M (PO 4 )] structures ( M = Zn, Ni, Mn, Fe) are discussed on the basis of common basic structural units.