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

Exceptionally large crystals of posnjakite, CuSO(OH)(HO), 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 = 0.029 and revealed a structure based upon [Cu(OH)(HO)O] sheets, which contain Jahn-Teller-distorted Cu octa-hedra. The sulfate tetra-hedra are bonded to one side of the sheet corner sharing and linked to successive sheets extensive hydrogen bonds. The sulfate tetra-hedra are split and rotated, which enables additional hydrogen bonds. © Mills et al. 2020.

Keywords

Copper, Corrosion, Hydrogen, Equipment, Failures, Crystal structure, ANSTO, Synchrotrons, Jahn-Teller effect, Chemical bonds

Citation

Mills, S., Aishima, J., Aragao, D., Caradoc-Davies, T. T., Cowieson, N., Gee, C. L., Ericsson, D., Harrop, S., Panjikar, S., Smith, K. M. L., Riboldi-Tunnicliffe, A., Williamson, R., & Price, J. R. (2020). Crystal structure of posnjakite formed in the first crystal water-cooling line of the ANSTO Melbourne Australian Synchrotron MX1 Double Crystal Monochromator. Acta Crystallographica. Section E, Crystallographic Communications, 76(7), 1136–1138. doi:10.1107/S2056989020008099

URI

https://apo.ansto.gov.au/handle/10238/15295

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