3D model (JSmol)
|Molar mass||245.264 g/mol (anhydrous) |
353.36 g/mol (hexahydrate)
371.37 g/mol (heptahydrate)
|Appearance||white odorless powder |
|Melting point||858 °C (1,576 °F; 1,131 K) (anhydrous)|
|Boiling point||1,000 °C (1,830 °F; 1,270 K) (anhydrous)|
|957 g/L (25 °C)|
|Solubility||soluble in ethanol (heptahydrate)|
|hexagonal (UCl3 type), hP8|
|P63/m, No. 176|
a = 0.74779 nm, b = 0.74779 nm, c = 0.43745 nm
Formula units (Z)
|Tricapped trigonal prismatic,(nine-coordinate)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Lanthanum chloride is the inorganic compound with the formula LaCl3. It is a common salt of lanthanum which is mainly used in research. It is a white solid that is highly soluble in water and alcohols.
Preparation and reactions
- La2O3 + 6 NH4Cl → 2 LaCl3 + 6 NH3 + 2 H2O
From the trichloride, one can produce the other trihalides by exchange. Reduction with potassium gives metallic lanthanum.
One application of lanthanum chloride is the removal of phosphate from solutions via precipitation, e.g. in swimming pools to prevent algae growth and other wastewater treatments. It has also shown use as a filter aid and an effective flocculent. Lanthanum chloride is also used in biochemical research to block the activity of divalent cation channels, mainly calcium channels. Doped with cerium, it is used as a scintillator material.
- Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). CRC Press. p. 4.69. ISBN 978-1439855119.
- Morosin, B (1968). "Crystal Structures of Anhydrous Rare‐Earth Chlorides". The Journal of Chemical Physics. 49 (7): 3007–3012. doi:10.1063/1.1670543.
- Brauer, G., ed. (1963). Handbook of Preparative Inorganic Chemistry (2nd ed.). New York: Academic Press.
- Ghassemi, Masood; Recht, Howard Leonard (1971). Phosphate Precipitation with Ferrous Iron.
- "Water Treatment Chemicals". American Elements. Retrieved 2018-08-03.
- Martin, T; Allier, C; Bernard, F (2007). "Lanthanum Chloride Scintillator for X-ray Detection". AIP Conference Proceedings. 879. pp. 1156–1159. doi:10.1063/1.2436269.
- "Lanthanum trichloride: An efficient Lewis acid catalyst for chemo and regioselective enamination of β-dicarbonyl compounds". Arkivoc. 2007 (13): 204. 2007. doi:10.3998/ark.5550190.0008.d23.
- Podkolzin SG, Stangland EE, Jones ME, Peringer E, Lercher JA (2007). "Methyl chloride production from methane over lanthanum-based catalysts". J. Am. Chem. Soc. 129 (9): 2569–76. doi:10.1021/ja066913w. PMID 17295483.
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