Terbium(IV) fluoride explained

Terbium(IV) fluoride is an inorganic compound with a chemical formula TbF₄. It is a white solid that is a strong oxidizer. It is also a strong fluorinating agent, emitting relatively pure atomic fluorine when heated, rather than the mixture of fluoride vapors emitted from cobalt(III) fluoride or cerium(IV) fluoride.^[1]

Preparation

Terbium(IV) fluoride can be produced by the reaction between very pure terbium(III) fluoride and xenon difluoride, chlorine trifluoride or fluorine gas:^[2]

2 TbF₃ + F₂ → 2 TbF₄

Properties

Terbium(IV) fluoride hydrolyzes quickly in hot water, producing terbium(III) fluoride and terbium oxyfluoride (TbOF). Heating terbium(IV) fluoride will cause it to decompose into terbium(III) fluoride and predominantly monatomic fluorine gas.^{[3] [4]}

TbF₄ → TbF₃ + F•↑The reaction will produce the mixed valence compound Tb(TbF₅)₃, which has the same crystal form as Ln(HfF₅)₃.^[5]

Terbium(IV) fluoride can oxidize cobalt trifluoride into cobalt tetrafluoride:^[6]

TbF₄ + CoF₃ → TbF₃ + CoF₄↑It can fluoronate [60]fullerene at 320–460 °C.^[7]

When terbium(IV) fluoride reacts with potassium chloride and fluorine, it can produce the mixed valence compound KTb₃F₁₂.^[8] A mixture of rubidium fluoride, aluminium fluoride and terbium(IV) fluoride produces Rb₂AlTb₃F₁₆.^[9]

References

attribution: This article was translated from the Chinese article

Notes and References

1. Rau . J. V. . Chilingarov . N. S. . Leskiv . M. S. . Sukhoverkhov . V. F. . Rossi Albertini . V. . Sidorov . L. N. . Transition and rare earth metal fluorides as thermal sources of atomic and molecular fluorine . Le Journal de Physique IV . August 2001 . 11 . PR3 . Pr3–109–Pr3-113 . 10.1051/jp4:2001314.
2. 无机化学丛书 第七卷 钪 稀土元素. 科学出版社. pp 244-246. 1. 卤素化合物
3. Thermal decomposition of curium tetrafluoride and terbium tetrafluoride. 0022-4596. 1988-04-01. Journal of Solid State Chemistry. 73. 2. 10.1016/0022-4596(88)90140-5. 524–530. en. 2018-12-09. Gibson . John K. . Haire . Richard G. . 1988JSSCh..73..524G .
4. Rau . J. V. . Chilingarov . N. S. . Leskiv . M. S. . Sukhoverkhov . V. F. . Rossi Albertini . V. . Sidorov . L. N. . Transition and rare earth metal fluorides as thermal sources of atomic and molecular fluorine . Le Journal de Physique IV . August 2001 . 11 . PR3 . Pr3–109–Pr3-113 . 10.1051/jp4:2001314.
5. Nikulin V V, Goryachenkov S A, Korobov M V, et al. On thermal stability of terbium tetrafluoride[J]. Zhurnal Neorganicheskoj Khimii, 1985, 30(10): 2530-2533.
6. Atomic fluorine in thermal reactions involving solid TbF4. 10.1016/S0022-1139(00)00259-1. 2000-07-01. Journal of Fluorine Chemistry. 104. 2. 291–295. 0022-1139. en. 2018-12-09. Chilingarov . N.S . Rau . J.V . Sidorov . L.N . Bencze . L. . Popovic . A. . Sukhoverkhov . V.F .
7. Reaction of [60]Fullerene with Terbium(IV) Fluoride]. 3. 10.1080/10641229809350215. 469–479. 6. Fullerene Science and Technology. May 1998. 1064-122X. en. 2018-12-13. O. V. Boltalina, A. Yu. Lukonin, V. K. Pavlovich, L. N. Sidorov, R. Taylor, A. K. Abdul-Sada.
8. 1998-09-01. Synthesis and Crystal Structure of a New Mixed-Valence Terbium Fluoride, KTb^IIITb^IV₂F₁₂, and Related KLn^IIIM^IV₂F₁₂Compounds (M^IV=Tb, Zr, Hf;Ln^III=Ce–Lu). Journal of Solid State Chemistry. en. 139. 2. 248–258. 10.1006/jssc.1998.7837. 0022-4596. 2018-12-10. Largeau . Eric . El-Ghozzi . Malika . Avignant . Daniel . 1998JSSCh.139..248L .
9. 2003-08-01. Synthesis and crystal structure of Rb₂AlTb₃F₁₆: a new mixed-valence terbium fluoride. Solid State Sciences. en. 5. 8. 1141–1148. 10.1016/S1293-2558(03)00131-6. 1293-2558. 2018-12-10. Josse . Michaël . Dubois . Marc . El-Ghozzi . Malika . Avignant . Daniel . 2003SSSci...5.1141J .