MINERALOGICAL ANALYSIS OF A WEATHERING MANTLE DERIVED FROM TUFFITE

被引：16

作者：

FABRIS, JD

COEY, JMD

DEJESUS, MF

SANTANA, DP

GOULART, AT

FONTES, MF

CURI, N

机构：

[1] UNIV DUBLIN TRINITY COLL,DEPT PURE & APPL PHYS,DUBLIN 2,IRELAND

[2] UNIV FED MINAS GERAIS,DEPT QUIM,BR-31270901 BELO HORIZONT,MG,BRAZIL

[3] UNIV FED ESPIRITO SANTO,DEPT QUIM,BR-29060900 VITORIA,ES,BRAZIL

[4] ESCOLA SUPER AGR LAVRAS,DEPT CIENCIA DO SOLO,BR-37200000 LAVRAS,MG,BRAZIL

来源：

HYPERFINE INTERACTIONS | 1994年 / 91卷 / 1-4期

关键词：

D O I：

10.1007/BF02064602

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Mossbauer spectra are presented at 15 and 298 K for magnetically-separated extracts of magnetic soils from a tuffite-derived weathering mantle from Minas Gerais, Brazil. The principal iron-bearing mineral is maghemite in which the degree of Ti or Mg substitution is found to vary with depth. The Mg-maghemite, with lattice parameter a(0) = 0.838 nm, is a new natural mineral. It is associated with anatase in the magnetic-separates.

引用

页码：751 / 757

页数：7