Crystal chemistry of (RE,A)2M3O7 compounds (RE = Y, lanthanide; A = Ba, Sr, Ca; M = Al, Ga)

J. M.S. Skakle*, R. Herd

*Corresponding author for this work

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Phases of general formula (REA)2M3O7 (RE = lanthanide, A = Ca, Sr, Ba; M = Ga, Al) are of interest for their nonlinear optical properties and have potential as solid state lasers. Their structures have been refined using X-ray and neutron diffraction data and are related to gehlenite, Ca2Al2SiO7, with M cations occupying Al and Si sites and RE and A cations sharing the Ca site with no evidence for ordering, although they occur in the ratio 1 : 1 because of stoichiometry; the M cations are tetrahedrally coordinated. (RE,Ba)2M3O7 compounds cannot be synthesized for M = Al or for RE cations smaller than Sm; this limitation is believed to be due to size mismatch between cations within the structure.

Original languageEnglish
Pages (from-to)195-202
Number of pages8
JournalPowder Diffraction
Volume14
Issue number3
DOIs
Publication statusPublished - 30 Sep 1999

Fingerprint

Crystal chemistry
Lanthanoid Series Elements
Rare earth elements
Cations
Positive ions
chemistry
cations
crystals
gehlenite
Solid state lasers
Neutron diffraction
solid state lasers
Stoichiometry
neutron diffraction
stoichiometry
Optical properties
optical properties
X ray diffraction
diffraction
x rays

Keywords

  • Gehlenite
  • Neutron diffraction
  • Optical materials
  • Rare earths
  • Rietveld refinement

ASJC Scopus subject areas

  • Radiation
  • Materials Science(all)
  • Instrumentation
  • Condensed Matter Physics

Cite this

Crystal chemistry of (RE,A)2M3O7 compounds (RE = Y, lanthanide; A = Ba, Sr, Ca; M = Al, Ga). / Skakle, J. M.S.; Herd, R.

In: Powder Diffraction, Vol. 14, No. 3, 30.09.1999, p. 195-202.

Research output: Contribution to journalArticle

@article{5da236a7cffa417680ef17ec42610cb0,
title = "Crystal chemistry of (RE,A)2M3O7 compounds (RE = Y, lanthanide; A = Ba, Sr, Ca; M = Al, Ga)",
abstract = "Phases of general formula (REA)2M3O7 (RE = lanthanide, A = Ca, Sr, Ba; M = Ga, Al) are of interest for their nonlinear optical properties and have potential as solid state lasers. Their structures have been refined using X-ray and neutron diffraction data and are related to gehlenite, Ca2Al2SiO7, with M cations occupying Al and Si sites and RE and A cations sharing the Ca site with no evidence for ordering, although they occur in the ratio 1 : 1 because of stoichiometry; the M cations are tetrahedrally coordinated. (RE,Ba)2M3O7 compounds cannot be synthesized for M = Al or for RE cations smaller than Sm; this limitation is believed to be due to size mismatch between cations within the structure.",
keywords = "Gehlenite, Neutron diffraction, Optical materials, Rare earths, Rietveld refinement",
author = "Skakle, {J. M.S.} and R. Herd",
year = "1999",
month = "9",
day = "30",
doi = "10.1017/S0885715600010526",
language = "English",
volume = "14",
pages = "195--202",
journal = "Powder Diffraction",
issn = "0885-7156",
publisher = "International Centre For Diffraction Data",
number = "3",

}

TY - JOUR

T1 - Crystal chemistry of (RE,A)2M3O7 compounds (RE = Y, lanthanide; A = Ba, Sr, Ca; M = Al, Ga)

AU - Skakle, J. M.S.

AU - Herd, R.

PY - 1999/9/30

Y1 - 1999/9/30

N2 - Phases of general formula (REA)2M3O7 (RE = lanthanide, A = Ca, Sr, Ba; M = Ga, Al) are of interest for their nonlinear optical properties and have potential as solid state lasers. Their structures have been refined using X-ray and neutron diffraction data and are related to gehlenite, Ca2Al2SiO7, with M cations occupying Al and Si sites and RE and A cations sharing the Ca site with no evidence for ordering, although they occur in the ratio 1 : 1 because of stoichiometry; the M cations are tetrahedrally coordinated. (RE,Ba)2M3O7 compounds cannot be synthesized for M = Al or for RE cations smaller than Sm; this limitation is believed to be due to size mismatch between cations within the structure.

AB - Phases of general formula (REA)2M3O7 (RE = lanthanide, A = Ca, Sr, Ba; M = Ga, Al) are of interest for their nonlinear optical properties and have potential as solid state lasers. Their structures have been refined using X-ray and neutron diffraction data and are related to gehlenite, Ca2Al2SiO7, with M cations occupying Al and Si sites and RE and A cations sharing the Ca site with no evidence for ordering, although they occur in the ratio 1 : 1 because of stoichiometry; the M cations are tetrahedrally coordinated. (RE,Ba)2M3O7 compounds cannot be synthesized for M = Al or for RE cations smaller than Sm; this limitation is believed to be due to size mismatch between cations within the structure.

KW - Gehlenite

KW - Neutron diffraction

KW - Optical materials

KW - Rare earths

KW - Rietveld refinement

UR - http://www.scopus.com/inward/record.url?scp=0033245052&partnerID=8YFLogxK

U2 - 10.1017/S0885715600010526

DO - 10.1017/S0885715600010526

M3 - Article

VL - 14

SP - 195

EP - 202

JO - Powder Diffraction

JF - Powder Diffraction

SN - 0885-7156

IS - 3

ER -