Hydrogen bonding in goldichite, KFe(SO₄)₂•4H₂O

Autor(en)

Zhuming Yang, Gerald Giester

Abstrakt

The crystal structure of goldichite KFe(SO4)2⋅4H2O was determined on a single crystal from the Baiyinchang copper deposit, Gansu, China. [P121/c1, a = 10.395(2), b = 10.475(2), c = 9.0875(18) Å, β = 101.65(3)°, V = 969.1(3) Å3, Z = 4]. All non-H atoms were refined with anisotropic displacement parameters and positions of H-atoms were determined by difference Fourier methods and refined from X-ray diffraction data. The crystal structure of goldichite consists of corrugated sheets parallel to the (100) plane by sharing corners between FeO6 octahedra and SO4 tetrahedra. The interstitial potassium atom exhibits a [KO7(H2O)2] nine-fold coordination, which shares edges to form a column parallel to the c-axis and to build a slab with the corrugated sheet. These slabs are linked in the [100] direction through a network of hydrogen bonds. Three types of hydrogen bonds involve links of slabs: Ow(3)-H(3B)···O(1), Ow(6)-H(6B)···O(11) and Ow(9)-H(9B)···O(11). The FTIR spectrum of goldichite shows a strong absorption between ~3384 cm−1 and ~3592 cm−1, which is in accordance with the O-H···O distances derived from structure data.

Organisation(en)

Institut für Mineralogie und Kristallographie

Externe Organisation(en)

Chinese Academy of Sciences (CAS)

Journal

Mineralogy and Petrology

Band

112

Seiten

135-142

Anzahl der Seiten

8

ISSN

0930-0708

DOI

https://doi.org/10.1007/s00710-017-0524-0

Publikationsdatum

06-2017

Peer-reviewed

Ja

ÖFOS 2012

105116 Mineralogie, 105113 Kristallographie

Schlagwörter

ASJC Scopus Sachgebiete

Geochemistry and Petrology, Geophysics

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/cdc1bf8e-11f3-4877-890e-584728c4a81c