Yttrium iodide
Names
Other names
Triiodoyttrium, yttrium triiodide,
[ 1] yttrium(3+) triiodide
Identifiers
ChemSpider
ECHA InfoCard 100.033.383
EC Number
UNII
InChI=1S/3HI.Y/h3*1H;/q;;;+3/p-3
Key: LFWQXIMAKJCMJL-UHFFFAOYSA-K
Properties
YI3
Molar mass
469.6193 g/mol
Appearance
Colorless crystals
Melting point
1,000 °C (1,830 °F; 1,270 K)
Boiling point
1,310 °C (2,390 °F; 1,580 K)
Soluble
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
Chemical compound
Yttrium iodide is a binary inorganic compound , a salt of yttrium and hydroiodic acid with the formula YI3 .[ 2] [ 3]
Synthesis
1. Heating yttrium and iodine in an inert atmosphere:
2
Y
+
3
I
2
⟶
2
YI
3
{\displaystyle {\ce {2Y + 3I2 -> 2YI3}}}
2. Heating yttrium oxide with ammonium iodide :
Y
2
O
3
+
6
NH
4
I
⟶
2
YI
3
+
6
NH
3
+
3
H
2
O
{\displaystyle {\ce {Y2O3 + 6NH4I -> 2YI3 + 6NH3 + 3H2O}}}
It can also be obtained by reacting yttrium oxide or yttrium hydroxide with hydroiodic acid.
Physical properties
Yttrium iodide forms colorless flaky crystals. The crystal structure is that of the BiI3 structure type.[ 4]
It dissolves well in water and ethanol . Does not dissolve in diethyl ether .
It also occurs as a tri- and hexahydrate.[ 5]
Applications
A precursor for YBCO superconducting materials in a lower temperature preparation.[ 6]
References
Salts and covalent derivatives of the
iodide ion
