Structural and Mossbauer study of Sr2FeO3X (X = F, Cl, Br) and the magnetic structure of Sr2FeO3F
Structural and Mossbauer study of Sr2FeO3X (X = F, Cl, Br) and the magnetic structure of Sr2FeO3F
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DOI：
10.1039/b008321f
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发表时间：
2001-01-01
影响因子：
--
通讯作者：
Weller, MT
中科院分区：
文献类型：
--
作者：
Hector, AL;Hutchings, JA;Weller, MT
用粉末中子衍射（PND）研究了Sr2FeO3F、Sr2FeO3Cl和Sr2FeO3Br的结构。这三种高铁酸盐在原始的四方空间群P4/nmm中结晶，阴离子完全有序，形成由岩盐型卤化锶层分隔的铁氧方形金字塔。Fe-57穆斯堡尔数据已被收集并确认在所有三种结构中都有一个扭曲八面体几何的铁（iii）位点。用变温PND数据测定了Sr2FeO3F的根2a x 2c磁性上层结构。
The structures of Sr2FeO3F, Sr2FeO3Cl and Sr2FeO3Br have been investigated using powder neutron diffraction (PND). All three ferrates crystallise in the primitive tetragonal space group P4/nmm and the anions are fully ordered giving iron oxygen square pyramids separated by rock salt type layers of strontium halide. Fe-57 Mossbauer data have been collected and confirm one iron(iii) site of distorted octahedral geometry in all three structures. Variable temperature PND data have been used to determine the root 2a x 2c magnetic superstructure of Sr2FeO3F.