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- Title
Ca<sub>3</sub>Ru<sub>3</sub>Zn<sub>13</sub> – a zinc-rich intermetallic phase composed of closest-packed layers.
- Authors
Kösters, Jutta; Chamard, Valentin Antoine; Matar, Samir F.; Pröbsting, Wilma; Block, Theresa; Pöttgen, Rainer
- Abstract
Ca3Ru3Zn13 was synthesized from the elements in a tantalum tube in a muffle furnace. The sample was annealed to 1123 K followed by slow cooling to enhance crystal growth. Ca3Ru3Zn13 was characterized through a Guinier powder pattern. The structure was refined from single crystal X-ray diffractometer data: new type, Pbcn, a = 522.92(5), b = 1792.72(14), c = 2789.6(2) pm, wR2 = 0.0590, 3451 F2 values, 177 variables. One can describe the Ca3Ru3Zn13 structure by a stacking of closest packed layers of compositions Ca6Zn10, Ca6Zn12 and Ru6Zn15. The calcium atoms have high coordination numbers: Ca1@Zn13Ru3Ca2, Ca2@Zn15Ru4Ca, Ca3@Zn15Ru4Ca and Ca4@Zn15Ru4Ca. The shortest interatomic distances occur between the ruthenium and zinc atoms (255–273 pm). The Ru1@Zn8, Ru2@Zn10 and Ru3@Zn8 polyhedra condense via common edges to the [Ru3Zn13] substructure which hosts the calcium atoms. The zinc substructure consists of 15 crystallographically independent zinc sites with a broader range of Zn–Zn distances (255–307 pm).
- Subjects
INTERATOMIC distances; CRYSTAL growth; SINGLE crystals; X-ray diffractometers; ZINC
- Publication
Zeitschrift für Kristallographie. Crystalline Materials, 2024, Vol 239, Issue 3/4, p93
- ISSN
2194-4946
- Publication type
Article
- DOI
10.1515/zkri-2023-0044