Nickeloan Pyroaurite from Leslie, Aberdeenshire

M. J. Wilson, P. D. Cradwick, M. L. Berrow, W. J. McHardy and J. D. Russell
The Macaulay Institute for Soil Research, Craigiebuckler, Aberdeen AB9 2QJ

Summary: A nickel-bearing mineral belonging to the pyroaurite-sjögrenite group has been found in a serpentinite rock near the village of Leslie, Aberdeenshire. X-ray powder diffraction data and electron-probe microanalysis indicate that the mineral has a three-layer rhombohedral structure with a probable formula near Mg42+Ni22+Fe23+(OH)13CO3·4H2O. The mineral can therefore be described as nickeloan pyroaurite. It decomposes readily in mildly acid conditions and if inherited by serpentinite-derived soils could well be an important source of plant-available nickel.

Mineralogical Magazine; March 1976 v. 40; no. 313; p. 447-451; DOI: 10.1180/minmag.1976.040.313.03
© 1976, The Mineralogical Society
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