Synthesis, crystal structure, and thermal stability of double borate Na3ErB2O6

Chimica Techno Acta

Bair G. Bazarov¹  Alexey K. Subanakov¹  Evgeniy V. Kovtunets¹  Jibzema G. Bazarova¹ 

[1] Baikal Institute of Nature Management SB RAS, 670047 Sakhyanovoy st., 6, Ulan-Ude;

关键词: sodium rare-earth borate;    solid-state reaction;    crystal structure;    rietveld refinement;    thermal analysis;   

DOI  :  10.15826/chimtech.2021.8.4.02

来源: DOAJ

【 摘 要 】

Double borate Na3ErB2O6 was synthesized by the solid-state reaction. The crystal structure of Na3ErB2O6 was refined by the Rietveld method: P21/c, a = 6.49775(14) Å, b = 8.50424(17) Å, c = 12.0067(3) Å, β = 118.4797(9)°, Z = 4. The crystal structure of Na3ErB2O6 consists of –[ErO6]∞-chains along the "b" axis, which are linked by BO3 triangles in a three-dimensional framework. Sodium atoms occupy empty positions inside the channels. The thermal behavior of Na3ErB2O6 was studied in detail in the range of 25–1150 °C range by DSC and TG methods. Na3ErB2O6 congruently melts at 1116 °C. Based on the results of DSC measurements, three reversible phase transitions were found for Na3ErB2O6.

【 授权许可】

Unknown