Salt-flux growth of HoCuMg<sub>4</sub> single crystals

Pöttgen, Rainer; Reimann, Maximilian Kai; Kremer, Reinhard K.; Dronskowski, Richard; Kösters, Jutta; Chen, Da

doi:10.1039/d3dt01511d

Cited by 2 publications

(4 citation statements)

References 64 publications

(89 reference statements)

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“…The main influence of the size of the alkaline earth element is on the AuÀ Mg/AuÀ Cd distance in the middle of the distorted hexagons, which increases from 283 pm (CaAuCd) via 292 pm (SrAuCd) to 328 pm (BaAuMg), indicating a substantial weakening of AuÀ Mg/AuÀ Cd bonding in this direction (tending towards a two-dimensional [AuMg] network in BaAuMg). The closely related structures of Ba 3 Au 4 Mg 4 [17] and BaAuMg 2 [14] show closer AuÀ Mg distances of 284-303 respectively 284-287 pm. This stretching within the series of AEAuMg phases reminds the course of the b parameter in the AEAuMg 2 series (also accompanied by a transition to a two-dimensional [AuMg 2 ] network).…”

Section: Crystal Chemistrymentioning

confidence: 85%

“…This is comparable to Ba 3 Au 4 Mg 4 (331-349 pm BaÀ Au). [17] and could be expected from the course of the electronegativities (Ba 0.89, Au 2.54 and Mg 1.31 on the Pauling scale [33] ).…”

Section: Crystal Chemistrymentioning

confidence: 99%

“…[16] In continuation of our phase analytical studies of the Ca-T-Mg and Sr-T-Mg systems, we now concentrate on the higher congener barium. The first discovered compounds were Ba 3 Au 4 Mg 4 with Gd 3 Cu 4 Ge 4 type structure [17] and the MgCuAl 2 type phases BaTMg 2 with T = Pd, Ag, Pt and Au. [18] Herein we present the synthesis and structural characterization of the equiatomic representatives BaTX (T = Pd, Pt, Au; X = Mg, Zn, Cd), including zinc and cadmium as X components.…”

Section: Introductionmentioning

confidence: 99%

“…In order to increase the phase purity and the quality of small single crystals, some samples were synthesized in a muffle furnace. Therefore, a sample of the starting composition Ba 1.05 AuMg (additional barium was used to avoid formation of the byproduct Ba 3 Mg 4 Au 4 [17] ) and another BaPdZn sample were weighed into a tantalum tube and then sealed under vacuum into quartz tubes for oxidation protection. The tubes were placed inside a muffle furnace and heated up to 1170 K within two hours.…”

Section: Introductionmentioning

confidence: 99%

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Equiatomic intermetallic barium compounds BaTX (T=Pd, Pt, Au; X=Mg, Zn, Cd) with TiNiSi and ZrBeSi type structure

Pöttgen

Reimann

Kösters

2023

Zeitschrift anorg allge chemie

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The equiatomic ternary BaTX (T=Pd, Pt, Au; X=Mg, Zn, Cd) phases were obtained by reaction of the elements in sealed tantalum ampoules. The compounds were characterized through their X‐ray powder patterns. BaAuMg and BaTCd (T=Pd, Pt, Au) crystallize with the TiNiSi type structure, while the compounds BaTZn (T=Pd, Pt) adopt the ZrBeSi type. The structures of BaAuMg and BaPdZn were refined from single crystal X‐ray diffractometer data: Pnma, a=801.34(5), b=467.71(8), c=924.07(10) pm, wR2=0.0955, 736 F2 values, 20 variables for BaAuMg and P63/mmc, a=449.68(2), c=901.62(4) pm, wR2=0.1172, 145 F2 values, 8 variables for BaPdZn. The structures derive from the aristotype AlB2. The gold and magnesium atoms form puckered Au3Mg3 hexagons with 284–328 pm Au−Mg while the Pd3Zn3 hexagons in BaPdZn are planar (260 pm Pd−Zn). Comparison of all known BaTX phases shows a range of the valence electron count (VEC) from 13 (BaMnGe) to 18 (BaAuP). The BaTX phases crystallize with seven different structure types and there is no obvious correlation with VEC.

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Section: Crystal Chemistrymentioning

confidence: 85%

“…This is comparable to Ba 3 Au 4 Mg 4 (331-349 pm BaÀ Au). [17] and could be expected from the course of the electronegativities (Ba 0.89, Au 2.54 and Mg 1.31 on the Pauling scale [33] ).…”

Section: Crystal Chemistrymentioning

confidence: 99%