“…Similar structure types have been observed in ternary alkaline earth and rare earth fluorides (Bevan et al 1980;Bevan et al 1982;Burns et al 1968), chlorides (Liu & Eick 1988;Liu & Eick 1999;Löchner & Blachnik 2011;Meyer & Masselmann 1998), and bromides (Masselmann & Meyer 1999;Liu & Eick 1989) and in mixed valent rare earth halides (Druding & Corbett 1961;Liu & Eick 1991). These superstructures follow the general formula of M n X 2n+5 forming either a rhombohedral (n = 14) or tetragonal (n = 15) structure and consists of [M 6 ZX 36 ] polyhedral clusters (Meyer & Wickleder 2000).…”
Key indicators: single-crystal X-ray study; T = 150 K; mean (La-Br) = 0.002 Å; disorder in main residue; R factor = 0.049; wR factor = 0.118; data-to-parameter ratio = 26.8.
“…Similar structure types have been observed in ternary alkaline earth and rare earth fluorides (Bevan et al 1980;Bevan et al 1982;Burns et al 1968), chlorides (Liu & Eick 1988;Liu & Eick 1999;Löchner & Blachnik 2011;Meyer & Masselmann 1998), and bromides (Masselmann & Meyer 1999;Liu & Eick 1989) and in mixed valent rare earth halides (Druding & Corbett 1961;Liu & Eick 1991). These superstructures follow the general formula of M n X 2n+5 forming either a rhombohedral (n = 14) or tetragonal (n = 15) structure and consists of [M 6 ZX 36 ] polyhedral clusters (Meyer & Wickleder 2000).…”
Key indicators: single-crystal X-ray study; T = 150 K; mean (La-Br) = 0.002 Å; disorder in main residue; R factor = 0.049; wR factor = 0.118; data-to-parameter ratio = 26.8.
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