Growth of Single Crystals in the Systems withR–Rh–B andR–Rh–B–C (R=Rare Earth Element) from Molten Copper Flux
✍ Scribed by Toetsu Shishido; Jinhua Ye; Takahiko Sasaki; Ryunosuke Note; Kazuo Obara; Toshitsugu Takahashi; Takehiko Matsumoto; Tsuguo Fukuda
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 1002 KB
- Volume
- 133
- Category
- Article
- ISSN
- 0022-4596
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✦ Synopsis
A slow cooling method using molten copper as a flux was applied for crystal growth in the systems R-Rh-B and R-Rh-B-C (R ؍ rare earth element). Ternary borides: Single crystals of RRh 3 B 2 (R ؍ Gd, Dy, Er, Tm, Yb, and Lu), RRh 4 B 4 (R ؍ Sm, Dy, Er, and Tm), and RRh 3 B (R ؍ Sm, Gd, Er, and Tm) were successfully obtained. Crystals of ErRh 3 B 2 are hexagonal rectangulars belonging to the monoclinic system a ؍ 0.5355(1) nm, b ؍ 0.9282(1) nm, c ؍ 0.3102(1) nm, and ؍ 90.89(3)°°. A super lattice appears along both the a and the c axes with the periods of 3a and 6c, respectively. Single crystals of ErRh 4 B 4 were obtained as rectangulars with a primitive tetragonal structure: a ؍ 0.5292(4) nm and c ؍ 0.7379(3) nm. Single crystals of ErRh 3 B were extracted as cubes. ErRh 3 B is cubic with a ؍ 0.41466(1) nm. PrRh 4.8 B 2 crystallized as hexagonal plates. This new compound is orthorhombic: a ؍ 0.9697(4) nm, b ؍ 0.5577(2) nm, and c ؍ 2.564(3) nm. Quaternary borocarbides: Single crystals of the new tetragonal compounds of RRh 2 B 2 C have been obtained for R ؍ Er and Gd as thin plates. Lattice parameters of e.g., ErRh 2 B 2 C, are a ؍ 0.36848(2) nm and c ؍ 1.05520(3) nm.