Thulium(III) iodide

Names
Other names

Thulium iodide
Thulium triiodide

Identifiers

CAS Number

* 13813-43-9 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 75572

EC Number |

* 237-472-4

PubChem CID

* 83750

InChI

* InChI=1S/3HI.Tm/h3*1H;/q;;;+3/p-3

Key: LZOMHYVAEHYDST-UHFFFAOYSA-K

SMILES

* I[Tm](I)I

Properties

Chemical formula

| TmI3
Appearance  | Yellow hexagonal crystal[1]
Melting point | 1015 °C[2]

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Infobox references

Thulium(III) iodide is an iodide of thulium, with the chemical formula of TmI3. Thulium(III) iodide is used as a component of metal halide lamps.[3]

## Preparation

Mercury(II) iodide can be heated with thulium to obtain thulium(III) iodide:[4]

2 Tm + 3 HgI2 → 2 TmI3 \+ 3 Hg

The mercury produced in the reaction can be removed by distillation.[5][4]

The thulium(III) iodide hydrate crystallized from solution can be heated with ammonium iodide to obtain the anhydrous form.[6][4]

## Properties

Thulium(III) iodide is a yellow, highly hygroscopic solid with a bismuth(III) iodide-type crystal structure.[4] It forms in the hexagonal crystal system.[6] Its hydrate can be heated in air to obtain TmOI. Its anhydrous form can be heated with thulium to obtain TmI2:[7]

2 TmI3 \+ Tm → 3 TmI2

## References

1. ↑ 王世华,谷亚平,蒋盛邦.在Tm-HgI2体系中TmI2生成机理[J].物理化学学报,1987(03):334-336.
2. ↑ Jantsch, G.; Zeitschrift fuer Anorganische und Allgemeine Chemie 1933, V212, P65-83 CAPLUS
3. ↑ Flesch, Peter G. (2007). Light and Light Sources: High-Intensity Discharge Lamps. Springer. p. 45. ISBN 9783540326847. https://books.google.com/books?id=fWHQbhgxpAkC&pg=PA45.
4. ↑ 4.0 4.1 4.2 4.3 Georg Brauer (Hrsg.), unter Mitarbeit von Marianne Baudler u. a.: Handbuch der Präparativen Anorganischen Chemie. 3., umgearbeitete Auflage. Band I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6, S. 1077.
5. ↑ Asprey, L. B.; Keenan, T. K.; Kruse, F. H. Preparation and crystal data for lanthanide and actinide triiodides. Inorg. Chem., 1964. 3 (8): 1137-1240
6. ↑ 6.0 6.1 无机化学丛书 第七卷 钪 稀土元素. 科学出版社. pp 211
7. ↑ L.B. Asprey, F.H. Kruse (1960). "Divalent thulium. Thulium di-iodide". Journal of Inorganic and Nuclear Chemistry 13 (1–2): 32–35. doi:10.1016/0022-1902(60)80232-1. http://linkinghub.elsevier.com/retrieve/pii/0022190260802321. Retrieved 2018-04-13. （注：此文献指出Tm+HgI2的反应生成TmI2）

HI |  |  |  | He

|
|
|
|

LiI | BeI2 | BI3 | CI4 | NI3 | I2O4,
I2O5,
I4O9 | IF,
IF3,
IF5,
IF7 | Ne
NaI | MgI2 | AlI3 | SiI4 | PI3,
P2I4 | S  | ICl,
ICl3 | Ar
KI | CaI2 | Sc  | TiI4 | VI3 | CrI3 | MnI2 | FeI2 | CoI2 | NiI2 | CuI | ZnI2 | Ga2I6 | GeI2,
GeI4 | AsI3 | Se  | IBr | Kr
RbI | SrI2 | YI3 | ZrI4 | NbI5 | Mo  | Tc  | Ru  | Rh  | Pd  | AgI | CdI2 | InI3 | SnI4,
SnI2 | SbI3 | TeI4 | I  | Xe
CsI | BaI2 |  | HfI4 | TaI5 | W  | Re  | Os  | Ir  | Pt  | AuI | Hg2I2,
HgI2 | TlI | PbI2 | BiI3 | Po  | AtI | Rn
Fr  | RaI2 |  | Rf  | Db  | Sg  | Bh  | Hs  | Mt  | Ds  | Rg  | Cn  | Nh  | Fl  | Mc  | Lv  | Ts  | Og
| ↓  |  |
La  | Ce  | Pr  | Nd  | Pm  | SmI2 | Eu  | Gd  | TbI3 | Dy  | Ho  | Er  | Tm  | Yb  | Lu
Ac  | ThI4 | Pa  | UI3,
UI4 | Np  | Pu  | Am  | Cm  | Bk  | Cf  | EsI3 | Fm  | Md  | No  | Lr

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*[CID]: Compound ID