Names | |
---|---|
IUPAC name
Europium(II) titanate
| |
Other names
Europium titante
Europium titanium oxide | |
Identifiers | |
3D model (
JSmol)
|
|
ChemSpider | |
| |
| |
Properties | |
EuTiO3 | |
Molar mass | 247.829g |
Appearance | Black Solid |
Hazards | |
GHS labelling: | |
Warning | |
Related compounds | |
Other
anions
|
Europium(II) hydride Europium(II) sulfate Europium(II) sulfide |
Related compounds
|
Europium barium titanate |
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
|
Europium(II) titanate is a black mixed oxide of europium and titanium, with the chemical formula of EuTiO3. It crystallizes in the perovskite structure. [1]
EuTiO3 was first examined in 1966 by McGuire, Shafer, Joenk, Halperin and Pickart where the magnetic structure was examined. [2] This compound received more attention at the beginning of the 21st century (2001 to 2015) due to the low-temperature phase transition to antiferromagnetic behavior at TN = 5.5 K, which has a significant influence on the dielectric constant. [3] [4] [5]
Dried Eu2O3 and Ti2O3 are mixed 1:1 and reacted in an argon atmosphere at 1400 °C: [3]
The europium is reduced and the titanium is oxidized.
This section may be too technical for most readers to understand.(July 2022) |
Europium(II) titanate has two different crystal forms depending on the temperature. The phase transition occurs at 282 K. [3] [6] The low temperature form crystallizes in the tetragonal space group I4/mcm (space group No. 140) with the lattice parameters a = 551.92(2) pm, c = 781.64(8) pm (measured at 90 K). The higher temperature form has a cubic form with Pm3m (space group No. 221) with lattice parameter a = 390.82(2) pm (measured at 300 K). [3] [7] The transition temperature of the crystal structure from the low-temperature to the high-temperature phase increases with increasing pressure. [8] The compound becomes G-type antiferromagnetic below 5.5 K. [9] The specific heat capacity is 125 J·mol−1·K−1 (at 600 K). [1] 125 J·mol−1·K−1290 K is 7,6 W·m−1·K−1 and the electrical conductivity is 105 (Ω·m)−1(at 330 K). [1]
{{
cite journal}}
: CS1 maint: numeric names: authors list (
link)
{{
cite journal}}
: CS1 maint: multiple names: authors list (
link)
{{
cite journal}}
: CS1 maint: multiple names: authors list (
link)
{{
cite journal}}
: CS1 maint: multiple names: authors list (
link)
{{
cite journal}}
: CS1 maint: multiple names: authors list (
link)
{{
cite journal}}
: CS1 maint: multiple names: authors list (
link)
{{
cite journal}}
: CS1 maint: multiple names: authors list (
link)
{{
cite journal}}
: CS1 maint: multiple names: authors list (
link)