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University of Chicago, Department of Geophysical Sciences, Chicago, IL, United States
Austinite belongs to the adelite mineral group of calcium and lead arsenates, and has the conichalcite/descloizite type of crystal structure. The crystal structure of nearly pure austinite, CaZn(AsO 4 )OH, was redetermined (R = 0.014) and the absolute configuration identified. The space group P2 1 2 1 2 1 and cell parameters a 7.5092(8), b 9.0438(9), c 5.9343(8) Aa match previous data. Zinc octahedra share edges to form chains parallel to c. Arsenic tetrahedra share vertices with the Zn octahedra to generate a compact framework. Calcium square antiprisms share edges to make chains parallel to a that occupy the channels in the zinc-arsenic framework.
This record provided courtesy of AGI/GeoRef.
This article has been cited by other articles:
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  B. J. Reddy, R. L. Frost, and W. N. Martens Characterization of conichalcite by SEM, FTIR, Raman and electronic reflectance spectroscopy Mineralogical Magazine, April 1, 2005; 69(2): 155 - 167. [Abstract] [Full Text] [PDF]
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