Investigation of the KNd(SO4)2·H2O–SrSO4·0.5H2O System
The cocrystallization of potassium, neodymium, and strontium sulfates from aqueous solutions has been studied using X-ray powder diffraction, thermogravimetry, energy-dispersive X-ray spectral analysis, and electron microscopy. Extensive solid solutions based on trigonal KNd(SO 4 ) 2 ⋅H 2 O have bee...
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| Veröffentlicht in: | Russian journal of inorganic chemistry 2023-10, Vol.68 (10), p.1475-1481 |
|---|---|
| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | The cocrystallization of potassium, neodymium, and strontium sulfates from aqueous solutions has been studied using X-ray powder diffraction, thermogravimetry, energy-dispersive X-ray spectral analysis, and electron microscopy. Extensive solid solutions based on trigonal KNd(SO
4
)
2
⋅H
2
O have been found to exist in the concentration range 100–20 mol % of the KNd(SO
4
)
2
⋅H
2
O–SrSO
4
⋅0.5H
2
O system. The unit cell parameters of the solid solutions have been determined. Two phases have been discovered: trigonal KNd(SO
4
)
2
⋅H
2
O (space group
P
3
1
21) and monoclinic KNd(SO
4
)
2
⋅H
2
O (space group
P
2
1
/
c
1
). The heterovalent substitution scheme 2Sr
2+
→ K
+
+ Nd
3+
stabilizes the structure of solid solutions based on the isostructural KNd(SO
4
)
2
⋅H
2
O and SrSO
4
⋅0.5H
2
O trigonal phases. |
|---|---|
| ISSN: | 0036-0236 1531-8613 |
| DOI: | 10.1134/S0036023623601824 |