The Cation Arrays in the Garnet-Type Al5Ln3O12and Perovskite-Like AlLnO3Compounds

In-situlaser synthesis of Nd–Al–O coatings: the role of sublattice cations in eutectic formation

“…In addition, the NdAl alloy has also been synthesized as a CsCltype structure. This fact adds a new structural coincidence in the sense that both alloy and oxide maintain topology and dimensions of the NdAl array, as it was earlier reported (Ramos-Gallardo & Vegas, 1997). These structural coincidences indicate that the conversions between partial phases (or fragments) of the eutectic are plausible.…”

“…Nanoindentation tests are consistent with excellent integration between coating and substrate. Structural similarities between the eutectic components within the coating, as well as between these and the substrate, are consistent with the crystallographic concepts proposed by Vegas (Ramos-Gallardo & Vegas, 1997), where cation subarrays play an important role governing metal oxide structures. These structure sublattices are suggested as the driving force behind eutectic oxide formation.…”

“…According to the concept explained by Vegas in previous work (Errandonea et al, 2008;Martinez-Cruz et al, 1994;Ramos-Gallardo & Vegas, 1997;Vegas & Jansen, 2002;Santamaría-Pé rez & Vegas, 2003;Santamaría-Pé rez et al, 2005;Vegas & García-Baonza, 2007;, the preservation of the corresponding alloy structures in oxides affords an explanation for the phase relations observed in these experiments and may contribute to the advancement of the understanding of eutectic systems empirically identified in the corresponding phase diagram (Wu & Pelton, 1992).…”

“…As will be shown below, the concept developed by Vegas and co-workers (Martinez-Cruz et al, 1994;Ramos-Gallardo & Vegas, 1997;Vegas, 2000;Vegas & Jansen, 2002;Santamaría-Pé rez & Vegas, 2003;Santamaría-Pé rez et al, 2005;Vegas & García-Baonza, 2007;Errandonea et al, 2008;Vegas, 2011) has demonstrated that the preservation of the structure of the elements/alloy in their corresponding binary/ternary/ quaternary oxides is more general than it was believed. Reports published by Blatov and co-workers, concerning the topological comparison of the tetrahedral structures M y (TO 4 ) z with those of the binary compounds A y X z (Ilyushin et al, 2004), the analysis of the borates, carbonates and nitrates (Blatov & Zakutkin, 2002) and the crystallochemical analysis of binary compounds and simple salts M y (LO 3 ) z (L = S, Se, Te, Cl, Br, I; Blatov & Peskov, 2006) all deserve to be considered in this context.…”

K4Bi2O5, a Novel Ternary Oxobismuthate(III)

“…Over this, it was found that the cation arrays alone form arrangements as in alloy structures. In recently published papers, Vegas et al (20,21) also state that in oxyhydroxides of trivalent metals as well as in garnet-type and perovskitelike compounds the cationic arrays can be related to the parent metallic phases. Unfortunately, an intermetallic phase ''K Bi'' is still unknown.…”