ISSN:
0044-2313
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
New Nesozincates: K4[ZnO3], Rb7Na[ZnO3]2For the first time A) K4[ZnO3] and B) Rb7Na[ZnO3]2 have been prepared (from the binary oxides). They represent the first oxozincates of the alkali metals in which the coordination number of Zn2+ is exclusively 3 (carbonate-like groups [ZnO3]). Both oxides crystallize triclinic, space group P1 with A): a = 1103.3(3), b = 881.3(3), c = 698.2(2) pm, α = 109.65(2)°, β = 89.56(2)°, γ = 102.41(3)° and Z = 4, and B): a = 1128.3(3), b = 974.5(3), c = 711,8(2) pm, α = 114.12(2)β, = = 88.46(3)°,γ = 106.48(2)° and Z = 4.Their crystal structures have been determined from single crystal data (four circle diffractometer) and refined to R = 10.1%, Rw = 7.8% (2905 unique I0(hkl)) and R = 19.5%, Rw = 17.3% (2269 unique I0(hkl)), respectively. The Madelung Part of Lattice Energy (MAPLE), Effective Coordination Numbers (ECoN) and Mean Fictive Ionic Radii (MEFIR) have been calculated.
Notes:
Neu dargestellt wurden A) K4[ZnO3] und B) Rb7Na[ZnO3]2 (aus den binären Oxiden). Es sind dies die ersten Alkalimetalloxozincate, in denen Zn2+ ausschließlich die Koordinationszahl 3 gegen O2- annimmt (carbonatanaloge Gruppen [ZnO3]). Beide Oxide kristallisieren triklin, Rgr. P1 mit A): a = 1103,3(3), b = 881,3(3), c = 698,2(2) pm, α = 109,65(3)°, β = 89,56(2)°, γ = 102,41(3)° und Z = 4, bzw. B): a = 1128,3(3), b = 974,5(3), c = 711,8(2) pm, α = 114,12(2)°, β = 88,46(3)°, γ = 106,48(2)° und Z = 4. Die Kristallstrukturen wurden aus Vierkreisdiffraktometerdaten bestimmt und bis R = 10,1%, Rw = 7,8% (2905 I0(hkl)) bzw. R = 19,5%, Rw = 17,3% (2269 I0(hkl)) verfeinert. Der Madelunganteil der Gitterenergie (MAPLE) sowie Mittlere Fiktive Ionenradien (MEFIR) und Effektive Koordinationszahlen (ECoN) wurden berechnet.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19875460312
