Australian Museum Journal Compositions of silver halides from the Broken Hill district, New South Wales
- Shortform:
- Gillard et al., 1997, Rec. Aust. Mus. 49(3): 217–228
- Author(s):
- Gillard, Robert D.; Hart, Alan D.; Humphreys, D. Alun; Symes, R. F.; Williams, P. A.
- Year published:
- 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 package:
- EndNote file
- Title page:
- Title page (96kb PDF)
- Complete work:
- Complete work (1533kb PDF)
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.