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