Investigation of the Na–Ga Phase Diagram
The Na-Ga phase diagram was reinvestigated by heat-flux differential scanning calorimetry (HF-DSC) and powder X-ray diffraction (PXRD). The most sodium-rich phase, Na<sub>22</sub>Ga<sub>39</sub>, melts congruently (549(2) °C), while Na<sub>7</sub>Ga<sub>13</sub> (545(2) °C), Na<sub>2</sub>Ga<sub>7</sub> (501(2) °C), and NaGa<sub>4</sub> (495(2) °C) decompose peritectically. In the sodium-rich region, a monotectic reaction between Na<sub>22</sub>Ga<sub>39</sub> and melt occurs at 495(2) °C. The critical temperature of the liquid two-phase region was estimated to 523(2) °C. The subtle differences in the decomposition temperatures of neighboring phases were resolved by differential thermal analysis using a mutual sample reference method.
Authors
- Michael Baitinger (ORCID: https://orcid.org/0000-0003-1242-2959)
- Chia‐Chi Yu (ORCID: https://orcid.org/0000-0001-5499-7086)
- Yuri Grin
- Marcus Schmidt
Institutions
- Max Planck Society (DE)
Publication Details
- Journal
- ACS Omega
- Published
- 2026-01-05
- DOI
- https://doi.org/10.1021/acsomega.5c11531
- Primary Topic
- Thermodynamic and Structural Properties of Metals and Alloys
- Type
- article
- Field-Weighted Citation Impact
- 0.00