Characterization of the FeSO₄.H₂O - CuSO₄.H₂O solid- solution series, and the nature of poitevinite, (Cu,Fe)SO₄ .H₂O

Author(s)

G. Giester, C. L. Lengauer, G. Redhammer

Abstract

Various members of the FeSO₄.H₂O - CuSO₄.H₂O kieserite-type solid-solution series were synthesized and investigated by X-ray powder diffraction and Mossbauer spectroscopy. Comparison of the Fe/Cu molar ratio between the precursor aqueous solutions and the products of precipitation revealed a preferred incorporation of Fe into the structure. End-member szomolnokite, FeSO₄.H₂O, is monoclinic, and synthetic CuSO₄.H₂O is triclinic. The cell-parameter refinements of (Fe,Cu)SO₄.H₂O compounds show a reduction in symmetry from monoclinic to triclinic beyond 20 mol.% Cu. By Mossbauer spectroscopy, significant ordering involving the cations can be observed only in members of the solid solution with more than 20 mol.% Cu. Poitevinite is a distinct mineral species because of cation site-ordering and of the triclinic distortion of the structure. -from Authors

Organisation(s)

Department of Mineralogy and Crystallography

External organisation(s)

University of Vienna

Journal

Canadian Mineralogist

Volume

32

Pages

873-884

No. of pages

12

ISSN

0008-4476

Publication date

1994

Peer reviewed

Yes

Austrian Fields of Science 2012

105116 Mineralogy, 105113 Crystallography

ASJC Scopus subject areas

Geochemistry and Petrology

Portal url

https://ucrisportal.univie.ac.at/en/publications/e7971250-c707-4853-8fab-9ea1dd9dc8dd