The Great Barrier Reef Expedition 1928–29: The crystal structure and occurrence of weddellite, ideally CaC₂O₄·2.5H₂O, from the Low Isles, Queensland
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Mills, Stuart J.; Christy, Andrew G.
Description
“Envelope crystals” collected during The Great Barrier Reef Expedition in May 1929 have been studied using low-temperature synchrotron single-crystal X-ray diffraction. The crystals are shown to be weddellite, with the largest content of zeolitic water reported to date. A new H₂O site has been located within the crystal structure. Study of the crystals show that the end-member formula for weddellite should be reported as CaC₂O₄·(2.5 – x)H₂O, where 0≤x≤ 0.25, instead of CaC₂O₄·(2H₂O or CaC2O₄·(2...[Show more]
dc.contributor.author | Mills, Stuart J. | |
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dc.contributor.author | Christy, Andrew G. | |
dc.date.accessioned | 2016-09-12T05:16:22Z | |
dc.date.available | 2016-09-12T05:16:22Z | |
dc.identifier.issn | 0026-461X | |
dc.identifier.uri | http://hdl.handle.net/1885/108729 | |
dc.description.abstract | “Envelope crystals” collected during The Great Barrier Reef Expedition in May 1929 have been studied using low-temperature synchrotron single-crystal X-ray diffraction. The crystals are shown to be weddellite, with the largest content of zeolitic water reported to date. A new H₂O site has been located within the crystal structure. Study of the crystals show that the end-member formula for weddellite should be reported as CaC₂O₄·(2.5 – x)H₂O, where 0≤x≤ 0.25, instead of CaC₂O₄·(2H₂O or CaC2O₄·(2 + x )H₂O. This is also the first report of weddellite occurring in a coral reef. | |
dc.publisher | Mineralogical Society | |
dc.rights | © 2016 The Mineralogical Society | |
dc.source | Mineralogical Magazine | |
dc.subject | Great Barrier Reef | |
dc.subject | weddellite | |
dc.subject | calcium oxalate | |
dc.subject | crystal structure | |
dc.subject | synchrotron | |
dc.subject | envelope crystals | |
dc.subject | Low Isles | |
dc.subject | biomineral | |
dc.title | The Great Barrier Reef Expedition 1928–29: The crystal structure and occurrence of weddellite, ideally CaC₂O₄·2.5H₂O, from the Low Isles, Queensland | |
dc.type | Journal article | |
local.identifier.citationvolume | 80 | |
dc.date.issued | 2016 | |
local.publisher.url | http://www.minersoc.org/ | |
local.type.status | Published Version | |
local.contributor.affiliation | Christy, A. G., Department of Applied Mathematics, Research School of Physics and Engineering, The Australian National University | |
local.bibliographicCitation.issue | 2 | |
local.bibliographicCitation.startpage | 399 | |
local.bibliographicCitation.lastpage | 406 | |
local.identifier.doi | 10.1180/minmag.2016.080.014 | |
Collections | ANU Research Publications |
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