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

Autor(en)

Michel Fleck, Ladislav Bohaty, Ekkehart Tillmanns

Abstrakt

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(en)

Institut für Mineralogie und Kristallographie

Externe Organisation(en)

Universität zu Köln

Journal

Solid State Sciences

Band

6

Seiten

469-477

Anzahl der Seiten

9

ISSN

1293-2558

Publikationsdatum

2004

Peer-reviewed

Ja

ÖFOS 2012

1051 Geologie, Mineralogie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/af47b251-ca6d-4594-8feb-0c9b68d56dff