A possible approach to circumvent these problems was considered to be the addition of a third component, e.g.
One promising candidate is the intermetallic phase α-BiMn unfortunately, it has not been possible to synthesize this phase as a single-phase bulk material in spite of intensive research ( e.g.
#Crystalmaker wyckoff sites free#
Both phases under discussion have analogous structural motifs.įor decades, there has been an ongoing search for ferromagnetic materials free of rare earth elements. The linkage results in a layer structure for RhMnBi 3, while in the case of Rh 6Mn 5Bi 18, a three-dimensional network is formed the latter, however, contains several areas where Bi⋯Bi distances suggest van der Waals interactions. In both crystal structures, the units formed by the transition metal atoms are enveloped by Bi atoms, which themselves form a loosely bound network. In the Rh 6Mn 5Bi 18 structure, the transition metal atoms are linked into ribbon-like structural units aligned along the direction, whereas planar sheets are formed in RhMnBi 3. Rh 6Mn 5Bi 18, with a Wyckoff sequence a f2 g2 i5, crystallizes in the tetragonal system (space group P4 2/ mnm Pearson symbol tP58), and RhMnBi 3, with a Wyckoff sequence a c g i q, crystallizes in the orthorhombic system ( Cmmm oS20). Their crystal structures represent new structure types. hexarhodium pentamanganese octadecabismuthide (Rh 6Mn 5Bi 18) and rhodium manganese tribismuthide (RhMnBi 3).
A study of the ternary Rh–Mn–Bi phase diagram revealed the existence of two new ternary bismuthides, viz.
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