Eine neue Modifikation von Na₂Zn₂O₃ / A New Modification of Na₂Zn₂O₃

Abstract

A new modification of Na2Zn20 3 has been synthesized via solid state reaction. According to the single crystal structure determination, the compound crystallizes in the space group P432|2 (No. 96) with lattice parameters a = 6.1812(2), c = 9.4479(4) A, Z = 4. The structure consists of Z n 0 4 tetrahedra connected via edges and corners forming a threedimensional network. The structure can be described as an distorted anti spinel.

Phase relations and flux research for zinc oxide crystal growth in the ZnO–Na2O–P2O5 system

“…It crystallizes in the monoclinic system with space group P2 1 /c and lattice parameters of a = 5.82(0), b = 5.95 (2), c = 5.88(7)Å and β = 117.6 • [11]. Trinschek and Jansen [12] synthesized a new modification of the 1:2 compound by solid-state reaction. According to the single crystal structure determination, it crystallizes in the tetragonal system with space group P4 3 2 1 2 and lattice parameters of a = b = 6.1812 (2), c = 9.4479(4)Å. Trinschek and Jansen also synthesized the 1:1 compound [13] and the 5:4 compound [14] by reacting Na 2 O, which was produced in situ from Na 3 N 2 and NaNO 2 , with ZnO in the solid-state.…”

Microstructural Observations in (Na0.5K0.5)NbO3Ceramics with CuO and ZnO Additives

“…22,23) Kulakov et al 22) reported that under certain oxygen environment, the NaCu 2 O 2 phase is stable in the temperature interval 530 to 900 C. The rate of decomposition of NaCu 2 O 2 becomes significantly higher at temperatures over 900 C. There are oxozincates (such as Na 2 ZnO 2 , Na 2 Zn 2 O 3 , Na 10 Zn 4 O 9 , and K 2 Zn 3 O 4 ) have been reported in different chemical systems. [24][25][26][27][28] The compounds are metastable up to 750 C. Additionally since the sintering temperature is reduced, the evaporation of Na 2 O is greatly reduced and the chance for Na element to interact with CuO or ZnO would be greatly enhanced.…”

The Azide/Nitrate Route, a Versatile and Prolific Procedure for the Synthesis of Alkali Oxometalates

“…Interestingly, this fact has allowed to prepare new metastable phases in the ternary system Na/Zn/O, which had previously been scanned carefully, putting special effort on synthesizing Na 2 ZnO 2 73. Employing the ANR, the new oxozinkates Na 10 Zn 4 O 9 54 as well as metastable Na 2 ZnO 2 55 and β‐Na 2 Zn 2 O 3 56 have been obtained, all featuring special structural properties. β‐Na 2 Zn 2 O 3 corresponds to an anti‐spinel structure, whereas Na 2 ZnO 2 and Na 10 Zn 4 O 9 are constituted of novel networks of linked tetrahedra (Figure 14).…”