Holmium structure

Heat of vaporization, 66 see also Vaporization Helium, 91 boiling point, 63 heat of vaporization, 105 interaction between atoms, 277 ionization energy, 268 molar volume, 60 on Sun, 447 source, 91 Hematite, 404 Hemin, structure of, 397 Hess s Law, 111 Heterogeneous, 70 systems and reaction rate, 126 n-Hexane properties, 341 Hibernation, 2 Hildebrand, Joel H.. 163 Holmium, properties, 412 Homogeneous, 70 systems and reaction rate, 126 Hydration, 313 Hydrazine, 46, 47, 231 Hydrides of third-row elements, 102 boiling point of. 315 Hydrocarbons, 340 unsaturated, 342... 

Erbium produces a brilliant emerald-green thermoluminescence, as discussed in the previous Chapter. Like the mixed oxides containing holmium compared with H02O3, there is more fine-structure in the emission spectrum of Er20s than of the mixed oxides of erbium(III). A common feature is the sharp edge of... 

Fig. 12.33 The molecular unit of tn s((lrphenylpro-paredionalo)aquahol-mium(lll) projected down the threefold axis. The water molecule is directly above the holmium atom but has been displaced slightly in this drawing to show the structure better. [From Zalkin, A. Templeton, O. H. Karraker, O. C. Incrg. Chem. 1969.8, 2680-2684. Reproduced with permission-]...

The only complexes of lanthanum or cerium to be described are [La(terpy)3][C104]3 175) and Ce(terpy)Cl3 H20 411). The lanthanum compound is a 1 3 electrolyte in MeCN or MeN02, and is almost certainly a nine-coordinate mononuclear species the structure of the cerium compound is not known with any certainty. A number of workers have reported hydrated 1 1 complexes of terpy with praseodymium chloride 376,411,438), and the complex PrCl3(terpy)-8H20 has been structurally characterized 376). The metal is in nine-coordinate monocapped square-antiprismatic [Pr(terpy)Cl(H20)5] cations (Fig. 24). Complexes with a 1 1 stoichiometry have also been described for neodymium 33, 409, 411, 413, 417), samarium 33, 411, 412), europium 33, 316, 411, 414, 417), gadolinium 33, 411), terbium 316, 410, 414), dysprosium 33, 410, 412), holmium 33, 410), erbium 33, 410, 417), thulium 410, 412), and ytterbium 410). The 1 2 stoichiometry has only been observed with the later lanthanides, europium 33, 411, 414), gadolinium, dysprosium, and erbium 33). 

Wenk, H.R. (1981) The crystal structures of yttrium, holmium and erbium formate dihydrates. Zeitschrift fuer Kristallographie, 154 (1-2), 137-145. 

Glowiak, T., Brzyska, W., Kula, A., and Rzaczynska, Z. (1999) Crystal structure of the isomorphous complexes tetraaquabis(2,6-dihydroxy-benzoato-0)(2,6-dihydroxy-benzoato-0,0)terbium(III) and holmium(III) dihydrate. Journal of Coordination Chemistry, 48 (4), 477 86. 

Csoeregh, I., Kierkegaard, P., Legendziewicz, J., and Huskowska, E. (1989) Crystal structure of holmium aspartate chloride hydrate Ho(L-Asp)Cl2-6H20. Acta Chemica Scandinavica, 43 (7), 636-640. 

Figure 9.15 ORTEP plot (upper) and unit-cell packing diagram of the complex [SmFe] [99]. (Reprinted with permission from B. Yan, and Z. Chen, Cyano-bridged aqua(A, A -dimethylacetamide)(cyanoiron)lanthanides from samarium, gadolinium, or holmium nitrate and potassium hexacyanoferrate crystal structures and magnetochemistry, Helvetica Chimica Acta, 2001, 84, 817-829 (Figures 1 and 2). Wiley-VCH Verlag GmbH Co. KGaA.)...

Yan, B. and Chen, Z. (2001) Cyano-bridged aqua(Ai,Ai-dimethylacetamide)(cyanoiron)lanthanides from samarium, gadolinium, or holmium nitrate and potassium hexacyanoferrate crystal structures and magnetochemistry. Helvetica ChimicaActa, 84, 817—829. 

Biborides of holmium and thulium have been prepared from the elements.332 They belong to the same class of structures as A1B2. The structures of HoCo2B2, PrCo2B2, and Y bCo3B2 have also been determined.333... 

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