| Identifiers | |
|---|---|
3D model (JSmol) | |
| |
| |
| Properties | |
| LaYbO3 | |
| Molar mass | 359.9577 g/mol |
| Appearance | white powder |
| Density | 8.08 g/cm3 |
| Related compounds | |
Otheranions | Lanthanum aluminate Lanthanum manganite |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Lanthanum ytterbium oxide is a solid inorganic compound oflanthanum,ytterbium andoxygen with thechemical formula of LaYbO3. This compound adopts theperovskite structure.
LaYbO3 is not a naturally occurringmineral but it can prepared by solid state reaction betweenLa2O3 andYb2O3 at temperatures around 1200 °C. Single-crystals of LaYbO3 can also be grown of a molten hydroxide flux at 750 °C in sealed silver tubes.[1] Thin films of LaYbO3 have also been fabricated bypulsed laser deposition.
LaYbO3 and other LaREO3 oxides (where RE=Ho, Y, Er, Tm, Yb, and Lu) compounds have anorthorhombic crystal structure with an internal symmetry described by the Pnmaspace group. The structure can be described by slightly distorted YbO6 octahedra tilted in the a−b+a− configuration according to Glazer's notation and antiparallel displaced La3+ ions. The rotation of the YbO6 octahedra reduces the coordination number of the La from 12 to 8.It exhibits exhibit a negative thermal expansion along the a and b axes.
LaYbO3 exhibits a room-temperaturepermittivity, ɛr, of ~26, which decreases slightly to 25 at 10 K. LaYbO3 showsantiferromagnetic ordering with a weak ferromagnetism at 2.7 K.[2] LaYbO3-based perovskites are also known to show proton conductivity at intermediate temperatures (600-800 °C).