Structural characterisation of MII guanidinium sulphate hydrates (MII = Mn, Fe, Co, Ni, Cd, VO)

Author(s)
Michel Fleck, Ladislav Bohaty, Ekkehart Tillmanns
Abstract

The crystal structures of six MII guanidinium double sulphates have been determined from single-crystal X-ray diffraction data collected with a CCD area detector at 293 K and were refined. These are the triclinic (space group P-1, Z=1) tetrahydrates [C(NH2)3]2Mn II(H2O)4(SO4)2 (a=6.368(1) A°, b=6.426(1) A°, c=9.952(2) A°, a�.01(1)°, ß—.03(1)°, ?0.07(1)°, V79.2(1) A°3) and [C(NH2)3]2Cd(H 2O)4(SO4)2 (a=6.441(1) A°, b=6.459(1) A°, c.015(2) A°, a�.18(1)°, ß—.02(1)°, ?0.00(1)°, V86.3(1) A°3), the monoclinic (space group P21/c, Z=2) hexahydrates [C(NH 2)3]2FeII(H2O) 6(SO4)2 (a.011(2) A°, b=7.657(2) A°, c.030(2) A°, ß–.85(3)°, V‘5.6(3) A°3), [C(NH2)3]2Ni(H 2O)6(SO4)2 (a.026(1) A°, b=7.633(1) A°, c.025(1) A°, ß—.09(1)°, V‘3.4(1) A°3) and [C(NH2)3]2Co(H 2O)6(SO4)2 (a.079(1) A°, b=7.654(1) A°, c.021(2) A°, ß—.02(1)°, V’0.4(2) A°3) as well as the triclinic (space group P-1, Z=4) vanadyl compound [C(NH2)3]2VO(H2O) 4(SO4)2 (a=7.366(1) A°, b.366(2) A°, c.302(4) A°, a7.10(3)°, ß”.07(3)°, ?�.05(3)°, V75.8(5) A°3). An investigation of the crystal structures shows layering of the units for all compounds. Three structure types can be distinguished. These types are compared in terms of arrangement and connection of the layers. Comparisons with structurally related compounds are discussed. Œ 2004 Elsevier SAS. All rights reserved.

Organisation(s)
Department of Mineralogy and Crystallography
External organisation(s)
Universität zu Köln
Journal
Solid State Sciences
Volume
6
Pages
469-477
No. of pages
9
ISSN
1293-2558
Publication date
2004
Peer reviewed
Yes
Austrian Fields of Science 2012
1051 Geology, Mineralogy
Portal url
https://ucrisportal.univie.ac.at/en/publications/af47b251-ca6d-4594-8feb-0c9b68d56dff