Contribution
Mineralogical observations of weddellite from South Georgia, Subantarctica
Van de Vijver, B.; Vochten, R.; Geys, J.; Verbruggen, C.; Beyens, L.
Neues Jahrbuch für Mineralogie - Monatshefte Jg. 1997 Heft 5 (1997), p. 193 - 202
18 références bibliographiques
publié: Jun 23, 1997
DOI: 10.1127/njmm/1997/1997/193
ArtNo. ESP156199705000, Prix: 29.00 €
Abstract
Weddellite crystals (CaC2O4 · 2H2O) were found in peat samples from Husvik on the subantarctic island of South Georgia. Compared to literature data, the crystals are rather small. They are prismatically shaped with tetragonal bipyramidal terminations. Interpenetration twins are frequently observed. The X-ray diffraction data show a slight difference with the ICDD-values. The possible source of these crystals is briefly discussed, favouring the in situ formation of weddellite, rather than the formation after storage and preparation of the material.
Mots-clefs
Weddellite • X-ray diffraction • peat samples • South Georgia • subantarctic region.