Synthesis, structure and properties of a semivalent iron oxoborate, Fe2OBO3

J P Attfield; A M T Bell; L M Rodriguez-Martinez; J M Greneche; R Retoux; R J Cernik; J F Clarke; D A Perkins

doi:10.1039/a804642e

Synthesis, structure and properties of a semivalent iron oxoborate, Fe2OBO3

J P Attfield, A M T Bell, L M Rodriguez-Martinez, J M Greneche, R Retoux, R J Cernik, J F Clarke, D A Perkins

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

Abstract

Transition metal oxoborates are of interest for magnetic and optical properties. Crystals of many MII2MIIIO2BO3 and MIIMIIIOBO3 materials can be grown from borate fluxes. In the FeII-FeIII-B-O system, flux growth results in Fe3O2BO3 crystals, but solid state reaction at higher temps. has yielded Fe2OBO3 as a polycryst. powder. This was characterized by synchrotron and neutron diffraction, electron microscopy, Mossbauer spectroscopy, cond. and magnetic measurements. Two notable transitions occur, a broad semiconductor-semiconductor change accompanied by a structural transition at 317 K, and L-type ferrimagnetic order below a Curie temp. of 155 K. An av. (Fe2+)0.5(Fe3+)0.5 valence is obsd. at the two crystallog. distinct sites in Fe2OBO3, indicating that charge ordering occurs. [on SciFinder(R)]

Original language	English
Pages (from-to)	205-209
Number of pages	5
Journal	J. Mater. Chem.
Volume	9
Issue number	1
DOIs	https://doi.org/10.1039/a804642e
Publication status	Published - 1999

Keywords

Magnetic transition
Mossbauer effect
Structural phase transition (in iron oxoborate)
Crystal structure
Electric resistance (of iron oxoborate)
crystal structure iron oxoborate
iron oxoborate prepn structure property
Mossbauer spectrum iron oxoborate
resistivity iron oxoborate
magnetic ordering transition iron oxoborate
phase transition structural iron oxoborate

Access to Document

10.1039/a804642e

Cite this

@article{c16962b4a69246e68d436e6ff0bf8caa,

title = "Synthesis, structure and properties of a semivalent iron oxoborate, Fe2OBO3",

abstract = "Transition metal oxoborates are of interest for magnetic and optical properties. Crystals of many MII2MIIIO2BO3 and MIIMIIIOBO3 materials can be grown from borate fluxes. In the FeII-FeIII-B-O system, flux growth results in Fe3O2BO3 crystals, but solid state reaction at higher temps. has yielded Fe2OBO3 as a polycryst. powder. This was characterized by synchrotron and neutron diffraction, electron microscopy, Mossbauer spectroscopy, cond. and magnetic measurements. Two notable transitions occur, a broad semiconductor-semiconductor change accompanied by a structural transition at 317 K, and L-type ferrimagnetic order below a Curie temp. of 155 K. An av. (Fe2+)0.5(Fe3+)0.5 valence is obsd. at the two crystallog. distinct sites in Fe2OBO3, indicating that charge ordering occurs. [on SciFinder(R)]",

keywords = "Magnetic transition, Mossbauer effect, Structural phase transition (in iron oxoborate), Crystal structure, Electric resistance (of iron oxoborate), crystal structure iron oxoborate, iron oxoborate prepn structure property, Mossbauer spectrum iron oxoborate, resistivity iron oxoborate, magnetic ordering transition iron oxoborate, phase transition structural iron oxoborate",

author = "Attfield, {J P} and Bell, {A M T} and Rodriguez-Martinez, {L M} and Greneche, {J M} and R Retoux and Cernik, {R J} and Clarke, {J F} and Perkins, {D A}",

note = "CAN 130:176625 Inorganic Chemicals and Reactions 1309-37-1 (Ferric oxide); 7439-89-6 (Iron); 10043-35-3 (Boric acid) Role: RCT (Reactant), RACT (Reactant or reagent) (for prepn. of iron oxoborate); 12523-52-3P (Iron borate oxide (Fe2(BO3)O)) Role: PEP (Physical, engineering or chemical process), PRP (Properties), SPN (Synthetic preparation), PREP (Preparation), PROC (Process) (prepn., crystal structure, Mossbauer spectrum, resistivity, and magnetic and phase transitions of)",

year = "1999",

doi = "10.1039/a804642e",

language = "English",

volume = "9",

pages = "205--209",

journal = "J. Mater. Chem.",

issn = "1364-5501",

publisher = "Royal Society of Chemistry",

number = "1",

}

TY - JOUR

T1 - Synthesis, structure and properties of a semivalent iron oxoborate, Fe2OBO3

AU - Attfield, J P

AU - Bell, A M T

AU - Rodriguez-Martinez, L M

AU - Greneche, J M

AU - Retoux, R

AU - Cernik, R J

AU - Clarke, J F

AU - Perkins, D A

N1 - CAN 130:176625 Inorganic Chemicals and Reactions 1309-37-1 (Ferric oxide); 7439-89-6 (Iron); 10043-35-3 (Boric acid) Role: RCT (Reactant), RACT (Reactant or reagent) (for prepn. of iron oxoborate); 12523-52-3P (Iron borate oxide (Fe2(BO3)O)) Role: PEP (Physical, engineering or chemical process), PRP (Properties), SPN (Synthetic preparation), PREP (Preparation), PROC (Process) (prepn., crystal structure, Mossbauer spectrum, resistivity, and magnetic and phase transitions of)

PY - 1999

Y1 - 1999

N2 - Transition metal oxoborates are of interest for magnetic and optical properties. Crystals of many MII2MIIIO2BO3 and MIIMIIIOBO3 materials can be grown from borate fluxes. In the FeII-FeIII-B-O system, flux growth results in Fe3O2BO3 crystals, but solid state reaction at higher temps. has yielded Fe2OBO3 as a polycryst. powder. This was characterized by synchrotron and neutron diffraction, electron microscopy, Mossbauer spectroscopy, cond. and magnetic measurements. Two notable transitions occur, a broad semiconductor-semiconductor change accompanied by a structural transition at 317 K, and L-type ferrimagnetic order below a Curie temp. of 155 K. An av. (Fe2+)0.5(Fe3+)0.5 valence is obsd. at the two crystallog. distinct sites in Fe2OBO3, indicating that charge ordering occurs. [on SciFinder(R)]

AB - Transition metal oxoborates are of interest for magnetic and optical properties. Crystals of many MII2MIIIO2BO3 and MIIMIIIOBO3 materials can be grown from borate fluxes. In the FeII-FeIII-B-O system, flux growth results in Fe3O2BO3 crystals, but solid state reaction at higher temps. has yielded Fe2OBO3 as a polycryst. powder. This was characterized by synchrotron and neutron diffraction, electron microscopy, Mossbauer spectroscopy, cond. and magnetic measurements. Two notable transitions occur, a broad semiconductor-semiconductor change accompanied by a structural transition at 317 K, and L-type ferrimagnetic order below a Curie temp. of 155 K. An av. (Fe2+)0.5(Fe3+)0.5 valence is obsd. at the two crystallog. distinct sites in Fe2OBO3, indicating that charge ordering occurs. [on SciFinder(R)]

KW - Magnetic transition

KW - Mossbauer effect

KW - Structural phase transition (in iron oxoborate)

KW - Crystal structure

KW - Electric resistance (of iron oxoborate)

KW - crystal structure iron oxoborate

KW - iron oxoborate prepn structure property

KW - Mossbauer spectrum iron oxoborate

KW - resistivity iron oxoborate

KW - magnetic ordering transition iron oxoborate

KW - phase transition structural iron oxoborate

U2 - 10.1039/a804642e

DO - 10.1039/a804642e

M3 - Article

SN - 1364-5501

VL - 9

SP - 205

EP - 209

JO - J. Mater. Chem.

JF - J. Mater. Chem.

IS - 1

ER -

Synthesis, structure and properties of a semivalent iron oxoborate, Fe2OBO3

Abstract

Keywords

Access to Document

Fingerprint

Cite this