A Thermal and X-ray Investigation of Scarbroite

W. J. Duffin and J. Goodyear
Physics Department, University of Hull.

Summary: Scarbroite, a fine-grained but compact deposit obtained from fissures in the sandstone on the north Yorkshire coast, is shown by chemical analysis to have an idealized formula Al2(CO3)3·12Al(OH)3. X-ray and electron diffraction data indicate a triclinic cell with a 9·94 Å., b 14·88 Å., c 26·47 Å., α 98·7°, β 96·5°, and γ 89·0°. A layer structure consisting of gibbsite-type sheets of Al(OH)3 and sheets of Al2(CO3)3 is proposed. The structure is stable from room temperature to about 125° C.

Mineralogical Magazine; March 1960 v. 32; no. 248; p. 353-362; DOI: 10.1180/minmag.1960.032.248.01
© 1960, The Mineralogical Society
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