ISSN:
0044-2313
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
On K4PbO4 and Rb4PbO4For the first time single crystals of K4[PbO4] have been prepared by heating K4PbO3 in O2. The structure has been refined [K4[PbO4]: 3029 I0(hkl), four circle diffractometer PW 1100, ω-scan, MoKα, R = 6.73%, Rw = 6.64%, P1; a = 658.62(15), b = 658.41(12), c = 986.64(21) pm, α = 79.74(2)°, β = 108.45(2)°, γ = 112.49(2)°, dx = 3.79 g · cm-3, dpyk = 3.78 g · cm-3, Z = 2; Rb4[PbO4]: a = 686.94(18), b = 684.43(18), c = 1020.73(21) pm, α = 79.28(2)°, β = 108.40(2)°, γ = 113.02(2)°, dx = 4.87 g · cm-3, dpyk = 4.85 g · cm-3, Z = 2, (from Rb2PbO3 and Rb2O)]. Both compounds are isotypic with K4SnO4. The Effective Coordination Numbers, ECoN, these via Mean Fictive Ionic Radii, MEFIR, are calculated.
Notes:
Erstmals wurden blaßgelbe Einkristalle von K4[PbO4] aus K4PbO3 mit O2 [Ag-Bömbchen; 590°C, 100 d] erhalten und die Struktur bestimmt [K4[PbO4]: 3029 I0(hkl), Vierkreisdiffraktometer PW 1100, ω-scan, MoKα, R = 6,73%, Rw = 6,64%, P1; a = 658,62(15), b = 658,41(12), c = 986,64(21) pm, α = 79,74(2)°, β = 108,45(2)°, γ = 112,49(2)°, drö = 3,79 g · cm-3, dpyk = 3,78 g · cm-3, Z = 2 bzw. für Rb4[PbO4]: a = 686,94(18), b = 684,43(18), c = 1020,73(21) pm, α = 79,28(2)°, β = 108,40(2)°, γ = 113,02(2)°, drö = 4,87 g · cm-3, dpyk = 4,85 g · cm-3, Z = 2, (aus Rb2PbO3 und Rb2O; Ag-Bömbchen; 480°C, 150 d)]. Beide sind isotyp mit K4SnO4. Die Struktur ist charakterisiert durch isolierte [PbO4]-Tetraeder. Die Effektiven Koordinationszahlen, ECoN, diese über Mittlere Fiktive Ionenradien, MEFIR, werden berechnet.
Additional Material:
6 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19835051011
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