Hematite-ilmenite (Fe2O3-FeTiO3) solid solutions: determinations of Fe-Ti order from magnetic properties

N. E. Brown; A. Navrotsky; G. L. Nord; S. K. Banerjee

Hematite-ilmenite (Fe₂O₃-FeTiO₃) solid solutions: determinations of Fe-Ti order from magnetic properties

N. E. Brown, A. Navrotsky, G. L. Nord, S. K. Banerjee

Research output: Contribution to journal › Article › peer-review

Abstract

The saturation magnetization, M_s(T), of samples with compositions spanning the ilmenite-hematite solid solution series has been measured at temperatures from 77 to 298 K. These data have been used to extrapolate to the saturation magnetization at 0 K. The saturation magnetization at 0 K is directly related to the distribution of Fe³⁺, Fe²⁺, and Ti⁴⁺ between the A and B sublattices of the ilmenite structure and can, therefore, be used to determine the order parameter, Q_Ms, for each composition and annealing temperature. High coercivities exhibited by samples with composition x_ilm = 0.6 and x_ilm = 0.7 are related to the development of high TDB surface areas and short-range ordering. With subsequent annealing below the order-disorder transition, coercivities are drastically reduced. -from Authors

Original language	English (US)
Pages (from-to)	941-951
Number of pages	11
Journal	American Mineralogist
Volume	78
Issue number	9-10
State	Published - 1993
Externally published	Yes

ASJC Scopus subject areas

Geophysics
Geochemistry and Petrology

Cite this

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title = "Hematite-ilmenite (Fe2O3-FeTiO3) solid solutions: determinations of Fe-Ti order from magnetic properties",

abstract = "The saturation magnetization, Ms(T), of samples with compositions spanning the ilmenite-hematite solid solution series has been measured at temperatures from 77 to 298 K. These data have been used to extrapolate to the saturation magnetization at 0 K. The saturation magnetization at 0 K is directly related to the distribution of Fe3+, Fe2+, and Ti4+ between the A and B sublattices of the ilmenite structure and can, therefore, be used to determine the order parameter, QMs, for each composition and annealing temperature. High coercivities exhibited by samples with composition xilm = 0.6 and xilm = 0.7 are related to the development of high TDB surface areas and short-range ordering. With subsequent annealing below the order-disorder transition, coercivities are drastically reduced. -from Authors",

author = "Brown, {N. E.} and A. Navrotsky and Nord, {G. L.} and Banerjee, {S. K.}",

year = "1993",

language = "English (US)",

volume = "78",

pages = "941--951",

journal = "American Mineralogist",

issn = "0003-004X",

publisher = "Mineralogical Society of America",

number = "9-10",

}

TY - JOUR

T1 - Hematite-ilmenite (Fe2O3-FeTiO3) solid solutions

T2 - determinations of Fe-Ti order from magnetic properties

AU - Brown, N. E.

AU - Navrotsky, A.

AU - Nord, G. L.

AU - Banerjee, S. K.

PY - 1993

Y1 - 1993

N2 - The saturation magnetization, Ms(T), of samples with compositions spanning the ilmenite-hematite solid solution series has been measured at temperatures from 77 to 298 K. These data have been used to extrapolate to the saturation magnetization at 0 K. The saturation magnetization at 0 K is directly related to the distribution of Fe3+, Fe2+, and Ti4+ between the A and B sublattices of the ilmenite structure and can, therefore, be used to determine the order parameter, QMs, for each composition and annealing temperature. High coercivities exhibited by samples with composition xilm = 0.6 and xilm = 0.7 are related to the development of high TDB surface areas and short-range ordering. With subsequent annealing below the order-disorder transition, coercivities are drastically reduced. -from Authors

AB - The saturation magnetization, Ms(T), of samples with compositions spanning the ilmenite-hematite solid solution series has been measured at temperatures from 77 to 298 K. These data have been used to extrapolate to the saturation magnetization at 0 K. The saturation magnetization at 0 K is directly related to the distribution of Fe3+, Fe2+, and Ti4+ between the A and B sublattices of the ilmenite structure and can, therefore, be used to determine the order parameter, QMs, for each composition and annealing temperature. High coercivities exhibited by samples with composition xilm = 0.6 and xilm = 0.7 are related to the development of high TDB surface areas and short-range ordering. With subsequent annealing below the order-disorder transition, coercivities are drastically reduced. -from Authors

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M3 - Article

AN - SCOPUS:0027806754

SN - 0003-004X

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JO - American Mineralogist

JF - American Mineralogist

IS - 9-10

ER -

Hematite-ilmenite (Fe₂O₃-FeTiO₃) solid solutions: determinations of Fe-Ti order from magnetic properties

Abstract

ASJC Scopus subject areas

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