Samarium(III) molybdate
    | |
| Identifiers | |
|---|---|
| Properties | |
| Sm2(MoO4)3 | |
| Appearance | white solid[1] |
| insoluble | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Samarium(III) molybdate is an inorganic compound, with the chemical formula Sm2(MoO4)3. It is one of the compounds formed by the three elements samarium, molybdenum and oxygen.
Preparation
[edit]Samarium(III) molybdate can be obtained by reacting samarium(III) nitrate and sodium molybdate in the pH range of 5.5~6.0.[2] Its single crystal can be grown at 1085 °C by the Czochralski method.[3]
Samarium(III) molybdate can also be prepared by reacting samarium and molybdenum(VI) oxide:
Properties
[edit]Samarium(III) molybdate forms violet crystals of several modifications:
- orthorhombic crystal system, space group P ba2, unit cell parameters a = 1.04393 nm, b = 1.04794 nm, c = 1.07734 nm, Z = 4, exists at temperatures below 193°C.
- monoclinic crystal system, exists at temperatures above 193°C.[4][5]
Samarium(III) molybdate exhibits ferroelectric properties.[6] It forms a crystalline hydrate with the composition Sm2(MoO4)3•2H2O.
Samarium(III) molybdate can be reduced to the tetravalent molybdenum compound Sm2Mo3O9 by hydrogen at 500~650 °C.[7]
References
[edit]- ^ Q Huang, J Xu, W Li (February 1989). "Preparation of tetragonal defect scheelite-type RE2(MoO4)3 (RE=La TO Ho) by precipitation method". Solid State Ionics. 32–33: 244–249. doi:10.1016/0167-2738(89)90228-2. Archived from the original on 2022-06-18. Retrieved 2022-05-17.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ C. M. Gupta, M. P. Joshi (May 1968). "Investigations on Polymolybdates of Rare Earths. Electrometric Studies on the Compositions of Samarium Polymolybdate". Bulletin of the Chemical Society of Japan. 41 (5): 1268–1270. doi:10.1246/bcsj.41.1268. ISSN 0009-2673.
- ^ Son, Jong Yoon; Lee, Sudae; Ahn, HyungJoo; Moon, Junkyu; Lee, Chanku; Jeon, Hyoseo; Lee, Hung-Bok. Behavior of ferroelastic domains in Sm2(MoO4)3 crystals(in Korean). Sae Mulli, 2001. 43 (1): 30-35. ISSN 0374-4914.
- ^ Adachi, M.; Akishige, Y.; Asahi, T.; Deguchi, K.; Gesi, K.; Hasebe, K.; Hikita, T.; Ikeda, T.; Iwata, Y. (2002), "Sm2(MoO4)3 [F], 17A-1", Oxides, Landolt-Börnstein - Group III Condensed Matter, vol. 36A2, Berlin/Heidelberg: Springer-Verlag, pp. 1–9, doi:10.1007/10857522_23, ISBN 3-540-42882-8, retrieved 2024-01-11
- ^ Roy, M.; Choudhary, R. N. P.; Acharya, H. N. (1987-10-01). "X-ray and dielectric studies of Sm2(MoO4)3". Pramana. 29 (4): 419–422. doi:10.1007/BF02845780. ISSN 0973-7111. S2CID 119605023.
- ^ Ponomarev, B. K.; Red’kin, B. S.; Stiep, E.; Wiegelmann, H.; Jansen, A. G. M.; Wyder, P. (2002-01-01). "Magnetoelectric effect in samarium molybdate". Physics of the Solid State. 44 (1): 145–148. Bibcode:2002PhSS...44..145P. doi:10.1134/1.1434495. ISSN 1090-6460. S2CID 121603541.
- ^ 史发年, 任玉芳, 孟建. Ln2Mo3O9的制备、结构及电磁性质. 应用化学, 1995. 2: 95-97.