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Single‐crystal structure determination of two new ternary bismuthides: Rh6Mn5Bi18 and RhMnBi3.
- Source :
- Acta Crystallographica Section C: Structural Chemistry; Jul2018, Vol. 74 Issue 7, p863-869, 6p
- Publication Year :
- 2018
-
Abstract
- A study of the ternary Rh–Mn–Bi phase diagram revealed the existence of two new ternary bismuthides, viz. hexarhodium pentamanganese octadecabismuthide (Rh<subscript>6</subscript>Mn<subscript>5</subscript>Bi<subscript>18</subscript>) and rhodium manganese tribismuthide (RhMnBi<subscript>3</subscript>). Their crystal structures represent new structure types. Rh<subscript>6</subscript>Mn<subscript>5</subscript>Bi<subscript>18</subscript>, with a Wyckoff sequence af2 g2 i5, crystallizes in the tetragonal system (space group P4<subscript>2</subscript>/mnm; Pearson symbol tP58), and RhMnBi<subscript>3</subscript>, with a Wyckoff sequence a c g i q, crystallizes in the orthorhombic system (Cmmm; oS20). In the Rh<subscript>6</subscript>Mn<subscript>5</subscript>Bi<subscript>18</subscript> structure, the transition metal atoms are linked into ribbon‐like structural units aligned along the [001] direction, whereas planar sheets are formed in RhMnBi<subscript>3</subscript>. In both crystal structures, the units formed by the transition metal atoms are enveloped by Bi atoms, which themselves form a loosely bound network. The linkage results in a layer structure for RhMnBi<subscript>3</subscript>, while in the case of Rh<subscript>6</subscript>Mn<subscript>5</subscript>Bi<subscript>18</subscript>, a three‐dimensional network is formed; the latter, however, contains several areas where Bi…Bi distances suggest van der Waals interactions. Both phases under discussion have analogous structural motifs. [ABSTRACT FROM AUTHOR]
- Subjects :
- SINGLE crystals
BISMUTHIDES
TERNARY alloys
Subjects
Details
- Language :
- English
- ISSN :
- 20532296
- Volume :
- 74
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Acta Crystallographica Section C: Structural Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 130525966
- Full Text :
- https://doi.org/10.1107/S2053229618009087