Magnesian halotrichite from White Island
Authors:
- 1 July 1979
- journal article
- research article
- Published by Wiley in New Zealand Journal of Geology and Geophysics
- Vol. 22 (4) , 495-498
Abstract
A magnesian halotrichite [(Fe 0.63 Mg 0.37 ).Al 2 (SO 4 ) 4 .22H 2 O] from a fumarole deposit on the active andesitic volcano of White Island, New Zealand, occurs as the major component in the mixture halotrichite—H 2 S0 4 ‐H 2 0—alunogen, with accessory gypsum, alunite, anhydrite, quartz, cristo‐balite, and tridymite. Optical, physical, and chemical data are given for the halotrichite. K :Na ratios in the alunite (85K:15Na) and in the solution (28K:72Na) show equilibrium between the salt and solutions.Keywords
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