Erbium(III) klorida heksahidrat juga membentuk kristal monoklinik dengan grup titik P2/n (P2/c) - C42h. Dalam senyawa ini, erbium terkoordinasi-8 untuk membentuk ion [Er(H 2O) 6Cl 2]+ dengan Cl− terisolasi yang melengkapi struktur.[6]
^ abTempelton DH, Carter GF (1954). "The Crystal Structure of Yttrium Trichloride and Similar Compounds". J Phys Chem. 58 (11): 940–943. doi:10.1021/j150521a002.
^Brauer, G., ed. (1963). Handbook of Preparative Inorganic Chemistry (edisi ke-2). New York: Academic Press.
^
Meyer, G. (1989). "The Ammonium Chloride Route to Anhydrous Rare Earth Chlorides—The Example of Ycl 3". The Ammonium Chloride Route to Anhydrous Rare Earth Chlorides-The Example of YCl3. Inorganic Syntheses. 25. hlm. 146–150. doi:10.1002/9780470132562.ch35. ISBN978-0-470-13256-2.
^Edelmann, F. T.; Poremba, P. (1997). Herrmann, W. A., ed. Synthetic Methods of Organometallic and Inorganic Chemistry. VI. Stuttgart: Georg Thieme Verlag. ISBN978-3-13-103021-4.
^Maeda Y, Akidzuki Y, Yamada T (1998). "All-optical liquid device derived from negative nonlinear absorption effect in an erbium chloride solution". Applied Physics Letters. 73 (17): 2411–2413. Bibcode:1998ApPhL..73.2411M. doi:10.1063/1.122450.
^Dalpozzo Renato, De Nino Antonio, Maiuolo Loredana, Oliverio Manuela, Procopio Antonio, Russo Beatrice, Tocci Amedeo (2007) Erbium(iii) Chloride: a Very Active Acylation Catalyst. Australian Journal of Chemistry 60, 75-79. DOI:10.1071/CH06346
^Synthesis of trans-4,5-Bis-dibenzylaminocyclopent-2-enone from Furfural Catalyzed by ErCl3·6H2O Mónica S. Estevão, Ricardo J. V. Martins, and Carlos A. M. Afonso Journal of Chemical Education 2017 94 (10), 1587-1589 {DOI|10.1021/acs.jchemed.6b00470}
^Luche, Jean-Louis (15 April 2001), "Erbium(III) Chloride", dalam John Wiley & Sons, Ltd, Encyclopedia of Reagents for Organic Synthesis (dalam bahasa Inggris), Chichester, UK: John Wiley & Sons, Ltd, hlm. re006, doi:10.1002/047084289x.re006, ISBN978-0-471-93623-7