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Crystal structure of Ba27Fe16Ti33O117

Siegrist, Theo LU ; Vanderah, TA; Svensson, Ch and Roth, RS (2002) In Solid State Sciences 4(7). p.911-916
Abstract
Single-crystal X-ray diffraction studies indicate that the compound Ba27Fe16Ti33O117 crystallizes in the rhombohedral space group R3m, with a hexagonal unit cell a = 5.7400(8), c = 127.11(3) Angstrom: Z = 1.5. The arrangement may be described as a 54-layer (54L) close-packed structure (stacking sequence (cchcchhhhcchhhhcch)(3)) built from oxygen and {Ba, O} layers, with Ti4+ occupying octahedra and Fe3+ occupying both octahedral and tetrahedral interstices. The 54L structure contains hexagonal 6L BaTiO3-type (cch)(2) units via a 9-fold repeat of the 6L stacking sequence, with iron preferentially occupying layers centered a-round z = 1/6, Ba27Fe16Ti33O117 melts incongruently at 1270 degreesC and is difficult to purify in polycrystalline... (More)
Single-crystal X-ray diffraction studies indicate that the compound Ba27Fe16Ti33O117 crystallizes in the rhombohedral space group R3m, with a hexagonal unit cell a = 5.7400(8), c = 127.11(3) Angstrom: Z = 1.5. The arrangement may be described as a 54-layer (54L) close-packed structure (stacking sequence (cchcchhhhcchhhhcch)(3)) built from oxygen and {Ba, O} layers, with Ti4+ occupying octahedra and Fe3+ occupying both octahedral and tetrahedral interstices. The 54L structure contains hexagonal 6L BaTiO3-type (cch)(2) units via a 9-fold repeat of the 6L stacking sequence, with iron preferentially occupying layers centered a-round z = 1/6, Ba27Fe16Ti33O117 melts incongruently at 1270 degreesC and is difficult to purify in polycrystalline form, although crystals are easily obtained from partial melts. The new compound is a member of a family of ternary Ba-Fe-Ti-O phases that may be considered as dielectric-magnetic hybrids of barium-polytitanate and barium-hexaferrite crystal chemistries. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Solid State Sciences
volume
4
issue
7
pages
911 - 916
publisher
Editions scientifiques Elsevier
external identifiers
  • wos:000177955700005
  • scopus:0036324319
ISSN
1873-3085
DOI
10.1016/S1293-2558(02)01334-1
language
English
LU publication?
yes
id
8fcbb51f-c61c-418b-a4fd-6cdf29cad9d6 (old id 328486)
date added to LUP
2007-11-13 15:30:33
date last changed
2017-01-01 04:20:05
@article{8fcbb51f-c61c-418b-a4fd-6cdf29cad9d6,
  abstract     = {Single-crystal X-ray diffraction studies indicate that the compound Ba27Fe16Ti33O117 crystallizes in the rhombohedral space group R3m, with a hexagonal unit cell a = 5.7400(8), c = 127.11(3) Angstrom: Z = 1.5. The arrangement may be described as a 54-layer (54L) close-packed structure (stacking sequence (cchcchhhhcchhhhcch)(3)) built from oxygen and {Ba, O} layers, with Ti4+ occupying octahedra and Fe3+ occupying both octahedral and tetrahedral interstices. The 54L structure contains hexagonal 6L BaTiO3-type (cch)(2) units via a 9-fold repeat of the 6L stacking sequence, with iron preferentially occupying layers centered a-round z = 1/6, Ba27Fe16Ti33O117 melts incongruently at 1270 degreesC and is difficult to purify in polycrystalline form, although crystals are easily obtained from partial melts. The new compound is a member of a family of ternary Ba-Fe-Ti-O phases that may be considered as dielectric-magnetic hybrids of barium-polytitanate and barium-hexaferrite crystal chemistries. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved.},
  author       = {Siegrist, Theo and Vanderah, TA and Svensson, Ch and Roth, RS},
  issn         = {1873-3085},
  language     = {eng},
  number       = {7},
  pages        = {911--916},
  publisher    = {Editions scientifiques Elsevier},
  series       = {Solid State Sciences},
  title        = {Crystal structure of Ba27Fe16Ti33O117},
  url          = {http://dx.doi.org/10.1016/S1293-2558(02)01334-1},
  volume       = {4},
  year         = {2002},
}