High-resolution x-ray powder diffraction studies of some Mg- and Si-substituted brownmillerites

A C Lewis; J K Cockroft; P Barnes; C Hall; R J Cernik; C C Tang; H Pollmann

doi:10.4028/www.scientific.net/MSF.228-231.759

High-resolution x-ray powder diffraction studies of some Mg- and Si-substituted brownmillerites

A C Lewis, J K Cockroft, P Barnes, C Hall, R J Cernik, C C Tang, H Pollmann

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

Abstract

Structure refinements from powder diffraction data are presented for Ca2Fe1.4Mg0.3Si0.3O5 (I) and Ca2Fe1.07Al0.67Mg0.13Si0.13O5 (II). I has space group Pcmn, a 5.5961(1), b 14.7766(3), c 5.4273(1) Å, Rwp = 12.5%, Rexp = 5.6%, RI = 8.7%; II has space group Ibm2, a 5.5815, b 14.5848(4), c 5.3711(1) Å, Rwp = 13.2%, Rexp = 6.7%, RI = 9.3%;. Although the site occupancies were not successfully detd. for the latter, results confirm the anion-deficient perovskite structure for both compds. [on SciFinder(R)]

Original language	English
Pages (from-to)	759-763
Number of pages	5
Journal	Mater. Sci. Forum
Volume	228-231
Issue number	Pt. 2, European Powder Diffraction: EPDIC IV, Pt. 2
DOIs	https://doi.org/10.4028/www.scientific.net/MSF.228-231.759
Publication status	Published - 1996

Keywords

Crystal structure (of Mg- and Si-substituted brownmillerites)
crystal structure calcium magnesium silicon ferrate
aluminum calcium magnesium silicon ferrate structure
brownmillerite magnesium silicon substitution crystal structure

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10.4028/www.scientific.net/MSF.228-231.759

Cite this

@article{efefecdc77a442a39859369e84e28edb,

title = "High-resolution x-ray powder diffraction studies of some Mg- and Si-substituted brownmillerites",

abstract = "Structure refinements from powder diffraction data are presented for Ca2Fe1.4Mg0.3Si0.3O5 (I) and Ca2Fe1.07Al0.67Mg0.13Si0.13O5 (II). I has space group Pcmn, a 5.5961(1), b 14.7766(3), c 5.4273(1) {\AA}, Rwp = 12.5%, Rexp = 5.6%, RI = 8.7%; II has space group Ibm2, a 5.5815, b 14.5848(4), c 5.3711(1) {\AA}, Rwp = 13.2%, Rexp = 6.7%, RI = 9.3%;. Although the site occupancies were not successfully detd. for the latter, results confirm the anion-deficient perovskite structure for both compds. [on SciFinder(R)]",

keywords = "Crystal structure (of Mg- and Si-substituted brownmillerites), crystal structure calcium magnesium silicon ferrate, aluminum calcium magnesium silicon ferrate structure, brownmillerite magnesium silicon substitution crystal structure",

author = "Lewis, {A C} and Cockroft, {J K} and P Barnes and C Hall and Cernik, {R J} and Tang, {C C} and H Pollmann",

note = "CAN 127:227611 Crystallography and Liquid Crystals 195067-36-8 (Calcium iron magnesium silicon oxide (Ca2Fe1.4Mg0.3Si0.3O5)); 195067-37-9 (Aluminum calcium iron magnesium silicon oxide (Al0.67Ca2Fe1.07Mg0.13Si0.13O5)) Role: PRP (Properties) (crystal structure of)",

year = "1996",

doi = "10.4028/www.scientific.net/MSF.228-231.759",

language = "English",

volume = "228-231",

pages = "759--763",

journal = "Materials Science Forum",

issn = "0255-5476",

publisher = "Trans Tech Publications Ltd",

number = "Pt. 2, European Powder Diffraction: EPDIC IV, Pt. 2",

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TY - JOUR

T1 - High-resolution x-ray powder diffraction studies of some Mg- and Si-substituted brownmillerites

AU - Lewis, A C

AU - Cockroft, J K

AU - Barnes, P

AU - Hall, C

AU - Cernik, R J

AU - Tang, C C

AU - Pollmann, H

N1 - CAN 127:227611 Crystallography and Liquid Crystals 195067-36-8 (Calcium iron magnesium silicon oxide (Ca2Fe1.4Mg0.3Si0.3O5)); 195067-37-9 (Aluminum calcium iron magnesium silicon oxide (Al0.67Ca2Fe1.07Mg0.13Si0.13O5)) Role: PRP (Properties) (crystal structure of)

PY - 1996

Y1 - 1996

N2 - Structure refinements from powder diffraction data are presented for Ca2Fe1.4Mg0.3Si0.3O5 (I) and Ca2Fe1.07Al0.67Mg0.13Si0.13O5 (II). I has space group Pcmn, a 5.5961(1), b 14.7766(3), c 5.4273(1) Å, Rwp = 12.5%, Rexp = 5.6%, RI = 8.7%; II has space group Ibm2, a 5.5815, b 14.5848(4), c 5.3711(1) Å, Rwp = 13.2%, Rexp = 6.7%, RI = 9.3%;. Although the site occupancies were not successfully detd. for the latter, results confirm the anion-deficient perovskite structure for both compds. [on SciFinder(R)]

AB - Structure refinements from powder diffraction data are presented for Ca2Fe1.4Mg0.3Si0.3O5 (I) and Ca2Fe1.07Al0.67Mg0.13Si0.13O5 (II). I has space group Pcmn, a 5.5961(1), b 14.7766(3), c 5.4273(1) Å, Rwp = 12.5%, Rexp = 5.6%, RI = 8.7%; II has space group Ibm2, a 5.5815, b 14.5848(4), c 5.3711(1) Å, Rwp = 13.2%, Rexp = 6.7%, RI = 9.3%;. Although the site occupancies were not successfully detd. for the latter, results confirm the anion-deficient perovskite structure for both compds. [on SciFinder(R)]

KW - Crystal structure (of Mg- and Si-substituted brownmillerites)

KW - crystal structure calcium magnesium silicon ferrate

KW - aluminum calcium magnesium silicon ferrate structure

KW - brownmillerite magnesium silicon substitution crystal structure

U2 - 10.4028/www.scientific.net/MSF.228-231.759

DO - 10.4028/www.scientific.net/MSF.228-231.759

M3 - Article

VL - 228-231

SP - 759

EP - 763

JO - Materials Science Forum

JF - Materials Science Forum

SN - 0255-5476

IS - Pt. 2, European Powder Diffraction: EPDIC IV, Pt. 2

ER -

High-resolution x-ray powder diffraction studies of some Mg- and Si-substituted brownmillerites

Abstract

Keywords

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