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The crystal structure of hohmannite, Fe2(H2O)4[(SO4)2O].4H2O and its relationship to amarantite, Fe2(H2O)4[(SO4)2O].3H2O

Published online by Cambridge University Press:  05 July 2018

F. Scordari
F. Scordari*
Affiliation:
Istituto di Mineralogia e Petrografia dell'Università di Bari, Italy
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Extract

Hohmannite is a hydrated sulphate of ferric iron with the formula Fe2(SO4)2(OH)2.7H2O (Palache, Berman, and Frondel, 1951).

Figs. 1 and 2 illustrate the structure of hohmannite. The first shows a complex chain of Fe(O, H2O)6 octahedra and SO4 tetrahedra, which runs along the c axis; the second visualizes the water molecules and an hypothetical hydrogen-bonds system obtained on the basis of electrostatic and geometrical considerations.

Type
Synopses
Information
Mineralogical Magazine , Volume 42 , Issue 321 , March 1978 , pp. 144 - 146
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1978

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References

O'Brien, (J.P.) and Rodgers, (K. A.), 1973a. Journ.Roy.Soc.,N.Z. 3, 169–90.CrossRefGoogle Scholar
O'Brien, (J.P.) and Rodgers, (K. A.), 1973b. Mineral.Mag. 39, 233–40.CrossRefGoogle Scholar
O'Brien, (J.P.) and Rodgers, (K. A.), 1974. Journ.Roy.Soc.N.Z. 4, 141–60.CrossRefGoogle Scholar