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Trace elements in coloured opals using neutron activation analysis

Abstract

Neutron activation analysis (NAA) is a technique particularly suited to analysing opals since it is non-destructive and the silica matrix of opals is not prone to significant activation. It was used to determine the concentration of trace elements in 50 samples of orange, yellow, green, blue and pink opals as well as 18 samples of colourless opals taken from a number of recognised fields in Australia, Peru, Mexico and USA. The results were then evaluated to determine if a relationship existed between trace element content and opal colour. The mean concentration of most of the elements found in orange, yellow and colourless opals were similar with few exceptions. This indicated that, for these samples, colour is not related to the trace elements present. However, the trace element profile of the green, pink and blue opals was found to be significantly different with each colour having a much higher concentration of certain trace elements when compared with all other opals analysed. 7 refs.
Authors:
McOrist, G D; Smallwood, A [1] 
  1. Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW (Australia)
Publication Date:
Dec 31, 1996
Product Type:
Conference
Report Number:
INIS-AU-0003; CONF-9511295-
Reference Number:
SCA: 400101; PA: AIX-28:056329; EDB-97:118936; SN: 97001840803
Resource Relation:
Journal Volume: 198; Journal Issue: 2; Conference: 9. Australian conference on nuclear technique of analysis, Newcastle (Australia), 27-29 Nov 1995; Other Information: PBD: [1996]; Related Information: Is Part Of 9th Australian conference on nuclear techniques of analysis. Proceedings; PB: 186 p.
Subject:
40 CHEMISTRY; SILICON OXIDES; COLOR; NEUTRON ACTIVATION ANALYSIS; IRRADIATION; PHYSICAL RADIATION EFFECTS; TRACE AMOUNTS
OSTI ID:
520448
Research Organizations:
Australian Inst. of Nuclear Science and Engineering, Lucas Heights, NSW (Australia)
Country of Origin:
Australia
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0236--5731; Other: ON: DE97638268; TRN: AU9716142056329
Availability:
INIS; OSTI as DE97638268
Submitting Site:
AUN
Size:
pp. 5-7
Announcement Date:

Citation Formats

McOrist, G D, and Smallwood, A. Trace elements in coloured opals using neutron activation analysis. Australia: N. p., 1996. Web. doi:10.1007/BF02036566.
McOrist, G D, & Smallwood, A. Trace elements in coloured opals using neutron activation analysis. Australia. doi:10.1007/BF02036566.
McOrist, G D, and Smallwood, A. 1996. "Trace elements in coloured opals using neutron activation analysis." Australia. doi:10.1007/BF02036566. https://www.osti.gov/servlets/purl/10.1007/BF02036566.
@misc{etde_520448,
title = {Trace elements in coloured opals using neutron activation analysis}
author = {McOrist, G D, and Smallwood, A}
abstractNote = {Neutron activation analysis (NAA) is a technique particularly suited to analysing opals since it is non-destructive and the silica matrix of opals is not prone to significant activation. It was used to determine the concentration of trace elements in 50 samples of orange, yellow, green, blue and pink opals as well as 18 samples of colourless opals taken from a number of recognised fields in Australia, Peru, Mexico and USA. The results were then evaluated to determine if a relationship existed between trace element content and opal colour. The mean concentration of most of the elements found in orange, yellow and colourless opals were similar with few exceptions. This indicated that, for these samples, colour is not related to the trace elements present. However, the trace element profile of the green, pink and blue opals was found to be significantly different with each colour having a much higher concentration of certain trace elements when compared with all other opals analysed. 7 refs.}
doi = {10.1007/BF02036566}
issue = {2}
volume = {198}
place = {Australia}
year = {1996}
month = {Dec}
}