Phase equilibria in the Tl2MoO4-Ho2(MoO4)3-Zr(MoO4)2 system and the crystal structure of Ho2Zr2(MoO4)7 and TlHoZr0.5(MoO4)3
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Subsolidus phase relations in the Tl2MoO4-Ho2(MoO4)3-Zr(MoO4)2 system have been studied by X-ray diffraction anddifferential thermal analysis methods. The system has been shown to contain molybdates with the compositionsTl5HoZr(MoO4)6 (5 : 1 : 2) and Tl2HoZr2(MoO4)6.5 (2 : 1 : 4). A new ternary molybdate TlHoZr0.5(MoO4)3 was discovered bythe method of spontaneous solution-melt crystallization through spontaneous nucleation, and its crystal structure has beendetermined to be: sp. gr. R 3, a = b = 13.3665(2) Å, c = 11.9844(4) Å, V = 1854.31(7) Å3, Z = 6. The mixed three dimensionalframework of the crystal structure is composed of Mo tetrahedra sharing O vertices with (Ho,Zr)O6 octahedra. The thalliumatoms occupy wide channels in the framework. Crystals of binary molybdate of Ho2Zr2(MoO4)7 composition were grown bysolution-melt crystallization and their crystal structure were determined to be: sp. gr. С2/c, a = 20.6668(4), b = 9.8193(2), c =13.8187(3) Å, b = 113.678(1)о, .V = 2568.20(9)Å3, Z = 4. The crystal structure is composed of three types of polyhedra: МоО4tetrahedra, ZrO6 octahedra, and eight-vertex HoO8.
Abstract
Subsolidus phase relations in the Tl2MoO4-Ho2(MoO4)3-Zr(MoO4)2 system have been studied by X-ray diffraction anddifferential thermal analysis methods. The system has been shown to contain molybdates with the compositionsTl5HoZr(MoO4)6 (5 : 1 : 2) and Tl2HoZr2(MoO4)6.5 (2 : 1 : 4). A new ternary molybdate TlHoZr0.5(MoO4)3 was discovered bythe method of spontaneous solution-melt crystallization through spontaneous nucleation, and its crystal structure has beendetermined to be: sp. gr. R 3, a = b = 13.3665(2) Å, c = 11.9844(4) Å, V = 1854.31(7) Å3, Z = 6. The mixed three dimensionalframework of the crystal structure is composed of Mo tetrahedra sharing O vertices with (Ho,Zr)O6 octahedra. The thalliumatoms occupy wide channels in the framework. Crystals of binary molybdate of Ho2Zr2(MoO4)7 composition were grown bysolution-melt crystallization and their crystal structure were determined to be: sp. gr. С2/c, a = 20.6668(4), b = 9.8193(2), c =13.8187(3) Å, b = 113.678(1)о, .V = 2568.20(9)Å3, Z = 4. The crystal structure is composed of three types of polyhedra: МоО4tetrahedra, ZrO6 octahedra, and eight-vertex HoO8.
참고문헌 (19)
- V. G. Grossman, , Inorg. Mater, 49, pp.1224~ (2013)
- V. G. Grossman, , J. Inorg. Chem, 53, pp.1788~ (2008)
- V. G. Grossman, , Russ. J. Inorg. Chem, 53, pp.1660~ (2008)
- O. D. Chimitova, , Russ. J. Appl. Chem, 81, pp.2043~ (2008)
- B. G. Bazarov, , J. Struct. Chem, 49, pp.53~ (2008)
- B. G. Bazarov, , Russ. J. Inorg. Chem, 51, pp.800~ (2006)
- E. Yu. Romanova, , Russ. J. Inorg. Chem, 52, pp.749~ (2007)
- E.Yu., "Romanova, New double and triple molybdates in the Ln2(MoO4)3-Hf(MoO4)2 and K2MoO4-Ln2(MoO4)3-Hf(MoO4)2(Ln = La-Lu, Y) systems", Extended Abstract of Cand Sci (Chem) Dissertation (Irkutsk State Uni, Russia, 2007), 23~ (2007)
- O.M. Basovich, "Extended Abstract of Cand. Sci. (Chem)Dissertation (Irkutsk State Uni, Russia, 2006)", 22~ (2006)
- B. G. Bazarov, , Russ. J. Inorg. Chem, 51, pp.794~ (2006)
- Zh. G. Bazarova, , Russ. J. Inorg. Chem, 46, pp.135~ (2001)
- G.M. Sheldrick, "SHELXL-97, “Program for the Crystal Structure Refinement”", Univ. of Götiingen, ~ (1997)
- V.K. Trunov, "Crystal Chemistry and Properties of Binary Molybdates and Tungstates", pp.173~ (1986), Leningrad
- S. F. Solodovnikov, , J. Struc. Chem, 45, pp.657~ (2004)
- R. D. Shannon, , Acta Crystallogr, 32, pp.751~ (1976)
- T. V. Namsaraeva, , Russ. J. Inorg. Chem, 55, pp.209~ (2010)
- B. G. Bazarov, , Doklady Physical Chem, 431, pp.43~ (2010)
- O. D. Chimitova, , Russ. Chem. Bull, 56, pp.2135~ (2007)
- B. G. Bazarov, , Russ. J. Inorg. Chem, 51, pp.1577~ (2006)