Pharmacosiderite has been investigated by Laue, powder, and rotation photographs. The space group isT d 1 . From the analysis of the literature the formula [Fe4(OH)4(AsO4)3] · K · 6–7 H2O has been derived. K+ and H2O fill up the large channels of a framework of AsO4-tetrahedrons and Fe3(OH)3O3-octahedrons. The intensities calculated are generally in conformity with the observation.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
G. Hägele undF. Machatschki, Fortschr. Min.21, 77 (1937).
E. G. J. Hartley, Z. Kristallogr.32, 220 ff. (1900).