Yttrium(III) chloride is an inorganic compound of yttrium and chloride. It exists in two forms, the hydrate (YCl3(H2O)6) and an anhydrous form (YCl3). Both are colourless solids that are highly soluble in water and deliquescent.
3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||195.265 g/mol|
|Melting point||721 °C (1,330 °F; 994 K)|
|Boiling point||1,482 °C (2,700 °F; 1,755 K)|
|751 g/L (20 °C)|
|Solubility||601 g/L ethanol (15 °C)|
606 g/L pyridine (15 °C)
|C2/m, No. 12|
a = 0.692 nm, b = 1.194 nm, c = 0.644 nm
α = 90°, β = 111°, γ = 90°
Formula units (Z)
|H315, H319, H335|
|P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P332+P313, P337+P313, P362|
|NFPA 704 (fire diamond)|
|Safety data sheet (SDS)||External MSDS|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
(what is ?)
Solid YCl3 adopts a cubic structure with close-packed chloride ions and yttrium ions filling one third of the octahedral holes and the resulting YCl6 octahedra sharing three edges with adjacent octahedra, giving it a layered structure. This structure is shared by a range of compounds, notably AlCl3.
The pentachloride decomposes thermally according to the following equation:
The thermolysis reaction proceeds via the intermediacy of (NH4)[Y2Cl7].