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Terbium(IV) fluoride
Names
	Other names terbium tetrafluoride
Identifiers
CAS Number	36781-15-4 ;
3D model (JSmol)	Interactive image;
ChemSpider	21493830;
PubChem CID	90471797;
CompTox Dashboard (EPA)	DTXSID001336486 ;
	InChI InChI=1S/4FH.Tb/h4*1H;/q;;;;+4/p-4 Key: XWMJNWMCMQWTCG-UHFFFAOYSA-J;
	SMILES [F-].[F-].[Tb+4].[F-].[F-];
Properties
Chemical formula	TbF4
Appearance	white solid
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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

^ Rau, J. V.; Chilingarov, N. S.; Leskiv, M. S.; Sukhoverkhov, V. F.; Rossi Albertini, V.; Sidorov, L. N. (August 2001). "Transition and rare earth metal fluorides as thermal sources of atomic and molecular fluorine". Le Journal de Physique IV. 11 (PR3): Pr3–109–Pr3-113. doi:10.1051/jp4:2001314.
^ 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
^ Gibson, John K.; Haire, Richard G. (1988-04-01). "Thermal decomposition of curium tetrafluoride and terbium tetrafluoride". Journal of Solid State Chemistry. 73 (2): 524–530. Bibcode:1988JSSCh..73..524G. doi:10.1016/0022-4596(88)90140-5. ISSN 0022-4596. Retrieved 2018-12-09.
^ Rau, J. V.; Chilingarov, N. S.; Leskiv, M. S.; Sukhoverkhov, V. F.; Rossi Albertini, V.; Sidorov, L. N. (August 2001). "Transition and rare earth metal fluorides as thermal sources of atomic and molecular fluorine". Le Journal de Physique IV. 11 (PR3): Pr3–109–Pr3-113. doi:10.1051/jp4:2001314.
^ 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.
^ Chilingarov, N.S; Rau, J.V; Sidorov, L.N; Bencze, L.; Popovic, A.; Sukhoverkhov, V.F (2000-07-01). "Atomic fluorine in thermal reactions involving solid TbF4". Journal of Fluorine Chemistry. 104 (2): 291–295. doi:10.1016/S0022-1139(00)00259-1. ISSN 0022-1139. Retrieved 2018-12-09.
^ O. V. Boltalina, A. Yu. Lukonin, V. K. Pavlovich, L. N. Sidorov, R. Taylor, A. K. Abdul-Sada (May 1998). "Reaction of [60]Fullerene with Terbium(IV) Fluoride". Fullerene Science and Technology. 6 (3): 469–479. doi:10.1080/10641229809350215. ISSN 1064-122X. Retrieved 2018-12-13.{{cite journal}}: CS1 maint: multiple names: authors list (link)
^ Largeau, Eric; El-Ghozzi, Malika; Avignant, Daniel (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. 139 (2): 248–258. Bibcode:1998JSSCh.139..248L. doi:10.1006/jssc.1998.7837. ISSN 0022-4596. Retrieved 2018-12-10.
^ Josse, Michaël; Dubois, Marc; El-Ghozzi, Malika; Avignant, Daniel (2003-08-01). "Synthesis and crystal structure of Rb₂AlTb₃F₁₆: a new mixed-valence terbium fluoride". Solid State Sciences. 5 (8): 1141–1148. Bibcode:2003SSSci...5.1141J. doi:10.1016/S1293-2558(03)00131-6. ISSN 1293-2558. Retrieved 2018-12-10.