期刊论文详细信息
Quimica nova | |
Magnetic iron oxides from a tuffite from Alto Paranaíba, state of Minas Gerais, Brazil | |
Goulart, Antonio Taranto1  Couceiro, Paulo Rogério da Costa2  Silva, Fernando Dias da2  Fabris, José Domingos2  Ker, João Carlos3  | |
[1] Centro Universitário de Patos de Minas, Patos de Minas;Universidade Federal de Minas Gerais, Belo Horizonte;Universidade Federal de Viçosa, Viçosa | |
关键词: magnesioferrite; Rietveld; Mö ssbauer.; | |
DOI : 10.1590/S0100-40422005000100002 | |
学科分类:化学(综合) | |
来源: Sociedade Brasileira de Quimica | |
【 摘 要 】
The Mössbaueranalysis along with the structural Rietveld refinement based on powder X-raydata for the magnetic fraction (saturation magnetization, s = 19 J T-1 kg-1)separated from a tuffite material from Alto Paranaíba, state of MinasGerais, Brazil, reveal that a (Ti, Mg)-rich maghemite (deduced s = 17 J T-1 kg-1)and, for the first time observed in this lithodomain, magnesioferrite (characteristics = 21 J T-1 kg-1)respond for the magnetization of the rock material. Consistent models for theionic distribution in these iron-rich spinel structures are proposed.
【 授权许可】
CC BY
【 预 览 】
Files | Size | Format | View |
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RO201902015738805ZK.pdf | 791KB | download |