Synthesis,structure, and thermal expansion of sodium zirconium arsenate phosphates |
| |
| Authors: | M V Sukhanov V I Pet’kov D V Firsov V S Kurazhkovskaya E Yu Borovikova |
| |
| Institution: | 1.Nizhni Novgorod State University,Nizhni Novgorod,Russia;2.Moscow State University,Vorob’evy gory, Moscow,Russia |
| |
| Abstract: | Sodium zirconium arsenate phosphates NaZr2(AsO4) x (PO4)3?x were synthesized by precipitation technique and studied by X-ray diffraction and IR spectroscopy. In the series of NaZr2(AsO4) x (PO4)3?x , continuous substitution solid solutions are formed (0 ≤ x ≤ 3) with the mineral kosnarite structure. The crystal structure of NaZr2(AsO4)1.5(PO4)1.5 was refined by full-profile analysis: space group R \(\bar 3\) c, a = 8.9600(4)Å, c = 22.9770(9) Å, V = 1597.5(1) Å3, R wp = 4.55. The thermal expansion of the arsenate-phosphate NaZr2(AsO4)1.5(PO4)1.5 and the arsenate NaZr2(AsO4)3 was studied by thermal X-ray diffraction in the temperature range of 20–800°C. The average linear thermal expansion coefficients (αav = 2.45 × 10?6 and 3.91 × 10?6 K?1, respectively) indicate that these salts are medium expansion compounds. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
