ISSN:
0044-2313
Keywords:
A2A3′[MO4]-type oxides (M = In, Tl; A = Rb, Cs; A′ = Na) single crystal structures
;
MAPLE calculations
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
New Examples of the A2A3′[MO4] Type: Rb2Na3[InO4], Cs2Na3[InO4], and Cs2Na3[TlO4]By exchange reactions the first examples of the A2A3′[MO4]-type with M = In, Tl and A = Rb, Cs Rb2Na3[InO4], Cs2Na3[InO4], and Cs2Na3[TlO4] were prepared in form of single crystals.(a)Rb2Na3[InO4]: colourless single crystals; heating intimate mixtures of a-Na5InO4 and Rb2O (Rb : In = 2.8 : 1, sealed Ni-tube; 300°C, 2 d; 620°C, 16 d), orthorhombic (Pnnm) with a = 971.1 (1), b = 950.0(1), c = 745.9 (1) pm, Z = 4; four-circle diffractometer data (Siemens AED 2, Mo-Kα, 9782Io(hkl), R = 5.7%, Rw = 4.5%). The new compound is isotypic to Na2Li3[GaO4] and K2Na3[InO4].(b)Cs2Na3[InO4]: light yellow single crystals; heating intimate mixtures of a-Na5InO4 and Cs2O (Cs : In = 5.0 : 1, sealed Au-tube, 260°C, 10 d; 600°C, 30 d), monoclinic (P21/c) with a = 634.8, b = 1026.7, c = 1254.6 pm, β = 111.52°, Z = 4, four-circle diffractometer data (Philips PW 1100, Ag-Kα, 6506 Io(hkl), R = 8.6%, Rw = 5.5%). The new compound is isotypic to K2Li3[GaO4].(c)Cs2Na3[TlO4]: orange single crystals, heating intimate mixture of a-Na5TlO4 and Cs2O (Cs : Tl = 2.3 : 1, sealed Ag-tube, 280°C, 3 d; 580°C, 30 d), monoclinic (P21/c) with a = 642.0, b = 1018.2, c = 1264.5 pm, β = 111.12°, Z = 4, four-circle diffractometer data (Philips PW 1100, Ag-Kα), 6391 Io(hkl), R = 15.4%, Rw = 9.1%). The new compound is isotypic to Cs2Na3[InO4].The Madelung part of lattice energy, MAPLE, and charge distributions for the three new oxides are calculated and discussed.
Notes:
Über Austauschreaktionen wurden mit Rb2Na3[InO4], Cs2Na3[InO4] und Cs2Na3[TlO4] die ersten Vertreter des Typs A2A3′[MO4] mit M = In bzw. Tl und A = Rb oder Cs in Form von Einkristallen dargestellt.(a)Rb2Na3[InO4]: farblose Einkristalle; Tempern inniger Gemenge von a-Na5InO4 und Rb2O (Rb : In = 2,8: 1; Ni-Bombe; 300°C, 2d; 620°C, 16d; orthorhombisch, Pnnm; a = 971,1 (1), b = 950,0 (1), c = 745,9 (1) pm; Z = 4; Vierkreisdiffraktometerdaten (Siemens AED 2; Mo - Kα; 9782 Io (hkl); R = 5,7%, Rw = 4,5%). Es liegt Isotypie zu Na2Li3[GaO4] und K2Na3[InO4] vor.(b)Cs2Na3[InO4]: hellgelbe Einkristalle; Tempern inniger Gemenge von a-Na5InO4 und Cs2O (Cs : In = 5,0 : 1; Au-Rohr; 260°C, 10 d; 600°C, 30 d); monoklin (P21/c) mit a = 634,8, b = 1026,7; c = 1254,6 pm, β = 111,52°; Z = 4; Vierkreisdiffraktometerdaten (Philips PW 1100, Ag-Kα, 6506 Io(hkl), R = 8,6%, Rw = 5,5%). Es liegt Isotypie zu K2Li3[GaO4] vor.(c)Cs2Na3[TlO4]: orangerote Einkristalle; Tempern inniger Gemenge von a-Na5TlO4 und Cs2O (Cs : Tl = 2,3 : 1; Ag-Bombe; 280°C, 3 d; 580°C, 30 d); monoklin (P21/c) mit a = 642,0, b = 1018,2, c = 1264,5 pm; β = 111,12°; Z = 4; Vierkreisdiffraktometerdaten (Philips PW 1100; Ag-Kα, 6391 Io(hkl), R = 15,4%, Rw = 9,1%). Die neue Verbindung ist isotyp zu Cs2Na3[InO4].Der Madelunganteil der Gitterenergie, MAPLE, und die Ladungsverteilung für die drei neuen Oxide werden berechnet und diskutiert.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19915950111
