Detail of "12370-45-5"

Reference

Crystal structures of Pb8O5(AsO4)2 and Pb5O4(CrO4), and review of PbO-related structural units in inorganic compounds

Crystal structures of Pb8O5(AsO4)2 and Pb5O4(CrO4), and review of PbO-related structural units in inorganic compounds. Krivovichev, S. V.; Armbruster, T.Several substances are used for example 12370-45-5 which is its cas registry number.; Depmeier, W. (Institut fur Geowissenschaften, Mineralogie/Kristallographie, Kiel Universitat, Kiel 24118, Germany). Journal of Solid State Chemistry, 177(4-5), 1321-1332 (English) 2004 Elsevier Science. CODEN: JSSCBI. ISSN: 0022-4596. DOCUMENT TYPE: Journal CA Section: 75 (Crystallography and Liquid Crystals) The crystal structures of Pb8O5(AsO4)2 and Pb5O4(CrO4) were structurally characterized using crystals prepd. by high-temp. solid-state reactions. The structure of Pb8O5(AsO4)2 (monoclinic, C2/m, a 10.797(2), b 10.429(2), c 14.614(3) ?, b 98.081(3)°) was refined to R1 = 0.034 from 1445 unique obsd. reflections. Pb8O5(AsO4)2 is isotypic to Pb8O5(PO4)2. It is based upon complex [O5Pb8] sheets consisting of OPb4 tetrahedra and strongly distorted OPb6 octahedra. These sheets are parallel to (001) and are linked via AsO4 groups located in the interlayer regions. The structure of Pb5O4(CrO4) (monoclinic, P21/c, a 14.792(2), b 11.677(2), c 11.582(2) ?, b 90.979(3)°) was refined to R1 = 0.051 from 1915 unique obsd. reflections. At. coordinates are given for both compds. It is isotypic to Pb5O4(MoO4) but not to Pb5O4(SO4). The structure is based upon [O3Pb5] chains of edge-sharing OPb4 tetrahedra extended along [100] and arranged parallely within the (001) plane. The adjacent [O3Pb5] chains are linked via OPb3 triangular groups of atoms along [001]. The CrO4 tetrahedra are located between the [O3Pb5] chains. The [O4Pb7] sheet and [O3Pb5] chain obsd. in the structures may be considered as derivs. of the continuous [OPb] sheet of OPb4 tetrahedra from the tetragonal modification of PbO. Both units can be obtained from the [OPb] sheet by a removal of a certain portion of OPb4 tetrahedra. This may be modeled using a lattice representation of tetrahedral sheets, where black and white squares correspond to OPb4 tetrahedra and vacancies, resp. The review of PbO-related units (eleven layers and eleven chains; consisting of both anion- and cation-centered tetrahedra) in inorg. compds. is provided with >80 compds. taken into account. .