Advances in ALCHEMI analysis

P. S. Turner; T. J. White; A. J. O'Connor; C. J. Rossouw

doi:10.1111/j.1365-2818.1991.tb03147.x

Advances in ALCHEMI analysis

P. S. Turner^*, T. J. White, A. J. O'Connor, C. J. Rossouw

^*Corresponding author for this work

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

31 Citations (Scopus)

Abstract

The ALCHEMI method for locating the sites of foreign atoms within crystals is known to be sensitive to the delocalized emission of X‐rays. This can result in large errors in some cases through differences in delocalization for different excitations or by error amplification in the ratio method of analysis. An alternative approach to the analysis of ALCHEMI data, using multivariate statistical analysis, is extended to the case of multiple impurities. Initial results from zone‐axis channelling experiments for a Yb‐doped zirconolite (CaZrTi₂O₇) are shown to confirm the improved accuracy of this method, especially for axial orientations. Data were collected using a 400‐keV analytical electron microscope fitted with an intrinsic Ge X‐ray detector. The potential advantages for ALCHEMI analysis of Ge detectors are considered. 1991 Blackwell Science Ltd

Original language	English
Pages (from-to)	369-378
Number of pages	10
Journal	Journal of Microscopy
Volume	162
Issue number	3
DOIs	https://doi.org/10.1111/j.1365-2818.1991.tb03147.x
Publication status	Published - Jun 1991
Externally published	Yes

ASJC Scopus Subject Areas

Pathology and Forensic Medicine
Histology

Keywords

ALCHEMI
delocalization
electron channelling
Ge detectors
microanalysis
X‐ray emission
zone‐axis channelling

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10.1111/j.1365-2818.1991.tb03147.x

Cite this

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title = "Advances in ALCHEMI analysis",

abstract = "The ALCHEMI method for locating the sites of foreign atoms within crystals is known to be sensitive to the delocalized emission of X‐rays. This can result in large errors in some cases through differences in delocalization for different excitations or by error amplification in the ratio method of analysis. An alternative approach to the analysis of ALCHEMI data, using multivariate statistical analysis, is extended to the case of multiple impurities. Initial results from zone‐axis channelling experiments for a Yb‐doped zirconolite (CaZrTi2O7) are shown to confirm the improved accuracy of this method, especially for axial orientations. Data were collected using a 400‐keV analytical electron microscope fitted with an intrinsic Ge X‐ray detector. The potential advantages for ALCHEMI analysis of Ge detectors are considered. 1991 Blackwell Science Ltd",

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author = "Turner, \{P. S.\} and White, \{T. J.\} and O'Connor, \{A. J.\} and Rossouw, \{C. J.\}",

year = "1991",

month = jun,

doi = "10.1111/j.1365-2818.1991.tb03147.x",

language = "English",

volume = "162",

pages = "369--378",

journal = "Journal of Microscopy",

issn = "0022-2720",

publisher = "Wiley-Blackwell",

number = "3",

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T1 - Advances in ALCHEMI analysis

AU - Turner, P. S.

AU - White, T. J.

AU - O'Connor, A. J.

AU - Rossouw, C. J.

PY - 1991/6

Y1 - 1991/6

N2 - The ALCHEMI method for locating the sites of foreign atoms within crystals is known to be sensitive to the delocalized emission of X‐rays. This can result in large errors in some cases through differences in delocalization for different excitations or by error amplification in the ratio method of analysis. An alternative approach to the analysis of ALCHEMI data, using multivariate statistical analysis, is extended to the case of multiple impurities. Initial results from zone‐axis channelling experiments for a Yb‐doped zirconolite (CaZrTi2O7) are shown to confirm the improved accuracy of this method, especially for axial orientations. Data were collected using a 400‐keV analytical electron microscope fitted with an intrinsic Ge X‐ray detector. The potential advantages for ALCHEMI analysis of Ge detectors are considered. 1991 Blackwell Science Ltd

AB - The ALCHEMI method for locating the sites of foreign atoms within crystals is known to be sensitive to the delocalized emission of X‐rays. This can result in large errors in some cases through differences in delocalization for different excitations or by error amplification in the ratio method of analysis. An alternative approach to the analysis of ALCHEMI data, using multivariate statistical analysis, is extended to the case of multiple impurities. Initial results from zone‐axis channelling experiments for a Yb‐doped zirconolite (CaZrTi2O7) are shown to confirm the improved accuracy of this method, especially for axial orientations. Data were collected using a 400‐keV analytical electron microscope fitted with an intrinsic Ge X‐ray detector. The potential advantages for ALCHEMI analysis of Ge detectors are considered. 1991 Blackwell Science Ltd

KW - ALCHEMI

KW - delocalization

KW - electron channelling

KW - Ge detectors

KW - microanalysis

KW - X‐ray emission

KW - zone‐axis channelling

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DO - 10.1111/j.1365-2818.1991.tb03147.x

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SP - 369

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JO - Journal of Microscopy

JF - Journal of Microscopy

IS - 3

ER -

Advances in ALCHEMI analysis

Abstract

ASJC Scopus Subject Areas

Keywords

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