New copper selenites
- Autor(en)
- Gerald Giester
- Abstrakt
he new compds. K2Cu2(SeO3)3 and K2Cu3(SeO3)4 were synthesized in the course of low-hydrothermal expts. on natrochalcite-type selenate representatives. The crystal structures were detd. by direct methods from single-crystal x-ray diffraction data. K2Cu2(SeO3)3: orthorhombic, space group Cmcm, Z = 4, a = 5.312(1), b = 9.858(3), c = 17.595(5) .ANG., V = 921.4(4) .ANG.3, rho-c = 4.226 g/cm3, µ(MoKalpha) = 174 cm-1, 1246 obsd. reflections with Fo > 4sigma(Fo), 53 refined parameters, R1 = 0.023, wR2 = 0.046 (all data). K2Cu3(SeO3)4: triclinic, space group P.hivin.1, Z = 1, a = 5.443(1), b = 7.158(2), c = 8.369(3) .ANG., alpha = 95.26(2)°, beta = 108.58(2)°, gamma = 92.17(2)°, V = 307.0(2) .ANG.3, rho-c = 4.201 g/cm3, µ(MoKalpha) = 177 cm-1, 2615 obsd. reflections with Fo > 4sigma(Fo), 98 refined parameters, R1 = 0.035, wR2 = 0.089 (all data). Both compds. contain sheets built from edge- or corner-sharing CuOn polyhedra (n = 5,6) and trigonal pyramidal selenite groups. These units are linked via the K atoms. In K2Cu2(SeO3)3 1 of the 2 selenite groups is strongly disordered.
- Organisation(en)
- Institut für Mineralogie und Kristallographie
- Journal
- Zeitschrift für Kristallographie - Crystalline Materials
- Band
- 213
- Seiten
- 266-269
- Anzahl der Seiten
- 4
- ISSN
- 2194-4946
- DOI
- https://doi.org/10.1524/zkri.1998.213.5.266
- Publikationsdatum
- 05-1998
- Peer-reviewed
- Ja
- ÖFOS 2012
- 105113 Kristallographie, 104024 Röntgenstrukturanalyse, 104011 Materialchemie
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/67c69e5f-ea0c-4ada-a00c-576bbf2eb3e0