57Fe Mössbauer spectra from fluorinated phases of Fe0.50M0.50(M = Co,Mg)Sb2O4
57Fe Mössbauer spectra from fluorinated phases of Fe0.50M0.50(M = Co,Mg)Sb2O4
复制标题
Fe0.50M0.50(M = Co,Mg)Sb2O4 氟化相的 57Fe 穆斯堡尔谱
DOI：
10.1007/s10751-019-1621-8
复制
发表时间：
2019
影响因子：
--
通讯作者：
Berry F
中科院分区：
文献类型：
--
作者：
Berry F
用~（57）Fe穆斯堡尔谱研究了Fe_（0.5）Co_（0.5）Sb_（2 O）4和Fe_（0.5）Mg_（0.5）Sb_（2 O）4与气态氟反应生成的氟化相。Fe 2+氧化成Fe 3+的程度已被用于量化掺入钙黄长石通道内的氟的量。在顺磁区记录的光谱中观察到的组分的多样性可以与邻近的氟离子的数目有关其位于与铁离子相同的晶体z坐标值的通道中。在较低的温度下记录的磁有序光谱从Co0.5Fe0.5Sb2O4F0.41与以前记录的FeSb 2 O 4的比较表明，插入到结构的通道的氟离子不影响EFG和磁超精细场之间的角度。
Fluorinated phases formed by reaction of Fe0.5Co0.5Sb2O4and Fe0.5Mg0.5Sb2O4with gaseous fluorine have been examined by57Fe Mössbauer spectroscopy between 298 and 5 K. The degree of oxidation of Fe2+to Fe3 +has been used to quantify the amount of fluorine incorporated within the channels of the schafarzikite-related structure and enable the evaluation of the compositions as Fe0.5Co0.5Sb2O4F0.41and Fe0.5Mg0.5Sb2O4F0.31.The multiplicity of components observed in the spectra recorded in the paramagnetic regime can be related to the number of near neighbour fluoride ions which lie in the channels at the same value of the crystalz- coordinate as the iron ions. Comparison of the magnetically ordered spectra recorded at lower temperatures from Co0.5Fe0.5Sb2O4F0.41with those recorded previously from FeSb2O4indicates that the insertion of fluoride ions into the channels of the structure does not affect the angle between the EFG and magnetic hyperfine field.