Abstract

Some 320 specimens of silver halides from the Broken Hill field, New South Wales, held in the collections of the Australian Museum have been examined. On the basis of colour and habit variations, 42 specimens were selected for analysis. Contrary to previous suggestions, compositions of individual specimens are highly variable and reflect a complex crystallisation history. Bromargyrite has been detected for the first time away from the Broken Hill main lode horizon. Compositions are discussed in terms of the lacunar nature of the appropriate phase diagrams; natural material is shown to reflect compositions of synthetic phases prepared at about 25°C. No obvious relationship between composition and physical properties could be detected for the chlorargyrite-bromargyrite series. This highlights the difficulties of visual identifications.

 
Download Complete Work

Bibliographic Data

Short Form
Gillard et al., 1997, Rec. Aust. Mus. 49(3): 217–228
Author
Robert D. Gillard; Alan D. Hart; D. Alun Humphreys; R. F. Symes; P. A. Williams
Year
1997
Title
Compositions of silver halides from the Broken Hill district, New South Wales
Serial Title
Records of the Australian Museum
Volume
49
Issue
3
Start Page
217
End Page
228
DOI
10.3853/j.0067-1975.49.1997.1268
Language
English
Date Published
22 December 1997
Cover Date
22 December 1997
ISSN
0067-1975
CODEN
RAUMAJ
Publisher
The Australian Museum
Place Published
Sydney, Australia
Digitized
17 February 2009
Available Online
16 July 2009
Reference Number
1268
EndNote
/Uploads/Journals/17847/1268.enw
Title Page
/Uploads/Journals/17847/1268.pdf
File size: 96kB
Complete Work
/Uploads/Journals/17847/1268_complete.pdf
File size: 1533kB