Crystal structure of sideronatrite-2M, Na₂Fe(SO₄)₂(OH)(H₂O)₃, a new polytype from Xitieshan lead-zinc deposit, Qinghai Province, China

Author(s)

Zhuming Yang, Gerald Giester, Kuishou Ding, He Li

Abstract

A monoclinic (2M) polytype of sideronatrite, Na2Fe(SO4)2(OH)(H2O)3, was found at Xitieshan, Qinghai Province, China. The crystal structure was solved by direct methods and refined by full-matrix least-squares (R1 = 3.88 %) in the space group P121/n1 with a = 7.1559(14), b = 7.2845(15), c = 20.889(4)Å, ß = 99.37(3)°, V = 1074.4(4)Å3, and Z = 4, using 2207 observed reflections with I > 2s(I). The atomic arrangement of sideronatrite-2M confirms a theoretical model in space group P21/a, previously proposed in literature. The structure of sideronatrite-2M is based on ferric-sulfate chains of 7 Å periodicity, similar to those observed in the structures of the orthorhombic polytype and of metasideronatrite. The system of hydrogen bonds has been determined.

Organisation(s)

Department of Mineralogy and Crystallography

External organisation(s)

Chinese Academy of Sciences (CAS)

Journal

European Journal of Mineralogy: an international journal of mineralogy, geochemistry and related sciences

Volume

27

Pages

427-432

No. of pages

6

ISSN

0935-1221

DOI

https://doi.org/10.1127/ejm/2015/0027-2441

Publication date

06-2015

Peer reviewed

Yes

Austrian Fields of Science 2012

105116 Mineralogy, 105113 Crystallography

Keywords

ASJC Scopus subject areas

Geochemistry and Petrology

Portal url

https://ucrisportal.univie.ac.at/en/publications/crystal-structure-of-sideronatrite2m-na2feso42ohh2o3-a-new-polytype-from-xitieshan-leadzinc-deposit-qinghai-province-china(9c313dfc-3841-4c82-8c16-469876ad6ed4).html