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Crystal structure of posnjakite formed in the first crystal water-cooling line of the ANSTO Melbourne Australian Synchrotron MX1 Double Crystal Monochromator

DOI: 10.1107/S2056989020008099 DOI Help

Authors: Stuart Mills (Museum Victoria) , Jun Aishima (rookhaven National Laboratory; Australian Synchrotron) , David Aragao (Australian Synchrotron; Diamond Light Source) , Tom Tudor Caradoc-Davies (Australian Synchrotron) , Nathan Cowieson (Australian Synchrotron; Diamond Light Source) , Christine L. Gee (Australian Synchrotron; University of California, Berkeley) , Daniel Ericsson (Australian Synchrotron) , Stephen Harrop (Australian Synchrotron) , Santosh Panjikar (Australian Synchrotron) , Kate Mary Louise Smith (Australian Synchrotron) , Alan Riboldi-Tunnicliffe (Australian Synchrotron) , Rachel Williamson (Australian Synchrotron) , Jason Roy Price (Australian Synchrotron)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Acta Crystallographica Section E Crystallographic Communications , VOL 76 , PAGES 1136 - 1138

State: Published (Approved)
Published: July 2020

Open Access Open Access

Abstract: Exceptionally large crystals of posnjakite, Cu4SO4(OH)6(H2O), formed during corrosion of a Swagelock(tm) Snubber copper gasket within the MX1 beamline at the ANSTO-Melbourne, Australian Synchrotron. The crystal structure was solved using synchrotron radiation to R1 = 0.029 and revealed a structure based upon [Cu4(OH)6(H2O)O] sheets, which contain Jahn–Teller-distorted Cu octa­hedra. The sulfate tetra­hedra are bonded to one side of the sheet via corner sharing and linked to successive sheets via extensive hydrogen bonds. The sulfate tetra­hedra are split and rotated, which enables additional hydrogen bonds.

Journal Keywords: crystal structure; copper corrosion; equipment failure; posnjakite; hydrogen bonding

Subject Areas: Earth Science, Chemistry

Facility: MX1 beamline at Australian Synchrotron

Added On: 01/07/2020 09:48


Discipline Tags:

Earth Sciences & Environment Mineralogy Chemistry Corrosion Inorganic Chemistry Geology

Technical Tags: