ChemInform Abstract: DIE SYSTEME RBF‐SMF3 UND CSF‐SMF3. UNTERSUCHUNG DER KUBISCHEN PHASEN MLN3F10 (M=K, RB, LN=SELTENERDMETALLE)

Abstract

In den mittels DTA und röntgenograp Verbindungen (I) bis (V) nachgewiesen.

Paramagnetic properties of cubic RbSm3F10 and KHo3F10

“…Powder X-ray diffraction spectra of both materials were very clean, with all peaks indexed to the cubic KY 3 F 10 structure and no impurity peaks detectable. The measured lattice constants were 11.908 Å for RbSm 3 F 10 and 11.571 Å for KHo 3 F 10 , in reasonable agreement with previously reported values [2]. Static magnetic susceptibilities were obtained for spherical samples of 1-2 mm diameter.…”

“…1. Compounds with this structure have been reported for rare earths from Sm through Tb incorporating Rb, and for Tb through Lu incorporating K [2,3]. We have previously observed magnetic order in a number of these materials, including several which contain three orthogonal Ising lattices [4][5][6].…”

Crystal chemistry of hydrothermally grown ternary alkali rare earth fluorides

“…This is consistent with the prototype hexagonal ARE 3 F 10 structure of KYb 3 F 10 (Alé onard et al, 1976), based on the Yb 3+ ion of nearly identical size to Lu 3+ . A previous solid-state synthesis reported powder of KLu 3 F 10 in the cubic structure type (Vedrine et al, 1975;Valon et al, 1977), again indicating a dependence on synthetic conditions.…”

Controllable synthesis of NH4Eu3F10nanospheres and application in bioimaging

“…You et al 16 reported that LnF 3 usually formed for larger rare earth cations (La 3+ , Pr 3+ and Nd 3+ ), RbLn 2 F 7 was obtained in the case of smaller cations (Yb 3+ and Lu 3+ ), and RbLn 3 F 10 formed only in the range of 1.42 < R < 1.55 which was close to the result reported by Vedrine. 15 The ionic radius (Pauling) of NH 4 + is 1.48 Å which is comparable with those of K + (1.33 Å) and Rb + (1.48 Å). 17 Thus, NH 4 Ln 3 F 10 are bound to form following the same rules as the similarly structured fluorides.…”

“…Generally, the formation of MLn 3 F 10 depends strongly on the size of cation. 14 For instance, Vedrine et al 15 proposed that cubic RbLn 3 F 10 was obtained only in the narrow range of 1.41 < R < 1.49 (R = r M+ /r Ln3+ ). You et al 16 reported that LnF 3 usually formed for larger rare earth cations (La 3+ , Pr 3+ and Nd 3+ ), RbLn 2 F 7 was obtained in the case of smaller cations (Yb 3+ and Lu 3+ ), and RbLn 3 F 10 formed only in the range of 1.42 < R < 1.55 which was close to the result reported by Vedrine.…”