Protactinium triiodide

Protactinium triiodide

Names
IUPAC name Protactinium triiodide
Other names Protactinium(III) iodide
Identifiers
CAS Number	19415-71-5  N
3D model (JSmol)	Interactive image
InChI InChI=1S/3HI.Pa/h3*1H;/q;;;+3/p-3 Key: CTZOGZYRIBUUIZ-UHFFFAOYSA-K
SMILES I[Pa](I)I
Properties
Chemical formula	I3Pa
Molar mass	611.74929 g·mol−1
Appearance	dark brown solid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Protactinium triiodide is an inorganic chemical compound with the chemical formula PaI₃. ^{[1] [2]}

Synthesis

The compound can be obtained from PaI₅ by heating at 350-380 °C in a continuously pumping vacuum. ^{[3] [4]}

Physical properties

PaI₃ forms a dark brown solid. ^[3] The compound has a PaBr₃ crystal structure. ^[3]

References

1. "WebElements Periodic Table » Protactinium » protactinium triiodide". webelements.com. Retrieved 29 September 2025.
2. Brown, D. (1968). Halides of the Lanthanides and Actinides. Wiley. p. 272. ISBN   978-0-470-10840-6 . Retrieved 29 September 2025.
3. Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3502. ISBN   978-0-412-30120-9 . Retrieved 29 September 2025.
4. Protactinium: The metal. Alloys. Compounds. Solution chemistry. Springer-Verlag. 1977. p. 70. ISBN   978-0-387-93355-9 . Retrieved 29 September 2025.