Yttrium and all lanthanides except Ce and Pm have been observed in the oxidation state 0 in bis(1,3,5-tri-t-butylbenzene) complexes, see Cloke, F. Geoffrey N. Zero Oxidation State Compounds of Scandium, Yttrium, and the Lanthanides. Chem. Soc. Rev. 1993, 22: 17–24. doi:10.1039/CS9932200017. and Arnold, Polly L.; Petrukhina, Marina A.; Bochenkov, Vladimir E.; Shabatina, Tatyana I.; Zagorskii, Vyacheslav V.; Cloke. Arene complexation of Sm, Eu, Tm and Yb atoms: a variable temperature spectroscopic investigation. Journal of Organometallic Chemistry. 2003-12-15, 688 (1–2): 49–55. doi:10.1016/j.jorganchem.2003.08.028.
Yttrium and all lanthanides except Ce and Pm have been observed in the oxidation state 0 in bis(1,3,5-tri-t-butylbenzene) complexes, see Cloke, F. Geoffrey N. Zero Oxidation State Compounds of Scandium, Yttrium, and the Lanthanides. Chem. Soc. Rev. 1993, 22: 17–24. doi:10.1039/CS9932200017. and Arnold, Polly L.; Petrukhina, Marina A.; Bochenkov, Vladimir E.; Shabatina, Tatyana I.; Zagorskii, Vyacheslav V.; Cloke. Arene complexation of Sm, Eu, Tm and Yb atoms: a variable temperature spectroscopic investigation. Journal of Organometallic Chemistry. 2003-12-15, 688 (1–2): 49–55. doi:10.1016/j.jorganchem.2003.08.028.
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Bill, H.; Calas, G. Color centers, associated rare-earth ions and the origin of coloration in natural fluorites. Physics and Chemistry of Minerals. 1978, 3 (2): 117–131. Bibcode:1978PCM.....3..117B. doi:10.1007/BF00308116.
Xue-Ming Yang, Michael J. Le Bas. Chemical compositions of carbonate minerals from Bayan Obo, Inner Mongolia, China: implications for petrogenesis. Lithos. 2004, 72 (1–2): 97–116. Bibcode:2004Litho..72...97Y. doi:10.1016/j.lithos.2003.09.002.
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Gupta, C. K.; Krishnamurthy, N. Extractive metallurgy of rare earths. International Materials Reviews. 1992, 37: 197–248 [2014-06-04]. (原始内容存档于2012-10-24).
Gupta, C. K.; Krishnamurthy, N. Extractive metallurgy of rare earths. International Materials Reviews. 1992, 37: 197–248 [2014-06-04]. (原始内容存档于2012-10-24).
Gupta, C. K.; Krishnamurthy, N. Extractive metallurgy of rare earths. International Materials Reviews. 1992, 37: 197–248 [2014-06-04]. (原始内容存档于2012-10-24).