Thorium diiodide

Source: Wikipedia, the free encyclopedia.
Thorium diiodide
Identifiers
3D model (
JSmol
)
  • InChI=1S/2HI.Th/h2*1H;/q;;+2/p-2
    Key: WASWCTHKYRRDNN-UHFFFAOYSA-L
  • [Th+2].[I-].[I-]
Properties
ThI2
Molar mass 612.75
Appearance golden metallic
Density 7.21 g/cm3[1]
Melting point 850 °C[2]
soluble
Structure
hexagonal
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Radioactive
Related compounds
Other cations
 Cerium diiodide
Praseodymium diiodide
Gadolinium diiodide
Related compounds
Thorium tetraiodide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Thorium diiodide is an iodide of thorium, with the chemical formula of ThI2. It is an electride with the ionic formula Th4+(I-)2e-2. It is air-sensitive.[3]

Preparation

Thorium diiodide cn be prepared by heating

stoichiometric amounts of thorium:[3][4]

ThI4 + Th → 2 ThI2

It can also be prepared by directly reacting thorium and iodine:[4]

Th + I2 → ThI2

Thorium diiodide can also be prepared from the decomposition of thorium triiodide at temperatures above 550 °C:[4]

2 ThI3 → ThI4 + ThI2

Properties

Like the diiodides of cerium, praseodymium and gadolinium, it has a metallic gold lustre and high electrical conductivity.[3]

References

  1. ISSN 0020-1669
    .
  2. ISBN 978-94-007-0211-0
    .
  3. ^
    ISBN 978-0-08-037941-8
    .
  4. ^
    ISBN 978-3-432-02328-1
    .
Retrieved from "https://en.wikipedia.org/w/index.php?title=Thorium_diiodide&oldid=1219189690"