Pressure and temperature dependence of the magnetic susceptibility of some ytterbium compounds with intermediate valence

Zell, W.; Pott, R.; Roden, B.; Wohlleben, D.

doi:10.1016/0038-1098(81)90822-x

Cited by 38 publications

(21 citation statements)

References 4 publications

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“…In contrast, little is known about the physical properties of the corresponding equiatomic compounds. Some remarkable examples of these compounds are the antiferromagnets CeAgGe (7) and CeAuIn (8) with Ne´el temperatures of 4.8 and 5.7 K, respectively, and the mixed-valence compound YbAuIn (9).…”

Section: Introductionmentioning

confidence: 99%

Structure, Chemical Bonding, Magnetic Susceptibility, and155Gd Mössbauer Spectroscopy of the Antiferromagnets GdAgGe, GdAuGe, GdAu0.44(1)In1.56(1), and GdAuIn

Pöttgen

Kotzyba

Görlich

et al. 1998

Journal of Solid State Chemistry

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Section: Introductionmentioning

confidence: 99%

Structure, Chemical Bonding, Magnetic Susceptibility, and155Gd Mössbauer Spectroscopy of the Antiferromagnets GdAgGe, GdAuGe, GdAu0.44(1)In1.56(1), and GdAuIn

Pöttgen

Kotzyba

Görlich

et al. 1998

Journal of Solid State Chemistry

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“…Besides the Heusler compounds also the series of equiatomic indides LnAuIn (Ln = Y, La±Nd, Sm, Gd±Er, Yb) with ZrNiAl type structure has been investigated [10]. Here, CeAuIn [11] orders antiferromagnetically at 5.7 K and YbAuIn [6] behaves like an intermediate-valent system. Furthermore, a solid solution YbAu 1+x In 1±x up to YbAu 1.27 In 0.73 was observed recently [12].…”

Section: Introductionmentioning

confidence: 99%

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Galadzhun

Zaremba

Kalychak

et al. 2000

Z. anorg. allg. Chem.

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La 3 Au 4 In 7 was prepared by arc-melting of the elements and subsequent annealing at 970 K. X-ray diffraction of powders and single crystals yielded I2/m11, mI28, a = 460.42(5) pm, b = 1389.5(1) pm, c = 1039.6(2) pm, a = 90.77(1)°, wR2 = 0.0621, 1089 F 2 values, 46 variables. The structure of La 3 Au 4 In 7 is of a new type. It may be considered as a monoclinically distorted, ordered variant of the La 3 Al 11 type. The structural relation with the family of BaAl 4 related compounds is discussed on the basis of a group-subgroup scheme. The gold and indium atoms in La 3 Au 4 In 7 build a three-dimensional [Au 4 In 7 ] polyanion in which the lanthanum atoms fill distorted pentagonal and hexagonal channels. Within the polyanion short Au±In and In±In distances are indicative of strongly bonding Au±In and In±In interactions. In 7 wurde durch Lichtbogenschmelzen und anschlieûendes Tempern bei 970 K aus den Elementen synthetisiert. Ro È ntgen-Beugungsaufnahmen an Pulvern und Einkristallen ergaben I2/m11, mI28, a = 460,42(5) pm; b = 1389,5(1) pm; c = 1039,6(2) pm; a = 90,77(1)°; wR2 = 0,0621; 1089 F 2 -Werte und 46 Variable. La 3 Au 4 In 7 kristallisiert mit einem neuen Strukturtyp, der als monoklin-verzerrte, geordnete Variante des La 3 Al 11 -Typs beschrieben werden kann. Die Verwandtschaft dieser Struktur mit der Familie der BaAl 4 Verbindungen wird anhand eines Gruppe-Untergruppe-Schemas diskutiert. Die Gold-und Indiumatome in La 3 Au 4 In 7 bilden ein dreidimensionales [Au 4 In 7 ] Polyanion, in dem die Lanthanatome verzerrte pentagonale und hexagonale Kana È le besetzen. Innerhalb des Polyanions liegen kurze Au±In-und In±In-Absta È nde vor, die auf stark bindende Au±In-und In±In-Wechselwirkungen hindeuten.

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“…First magnetic data for YbInAu were reported by Zell et al . Their sample showed a tiny Yb 2 O 3 impurity which was evident from the Néel temperature of 2.3 K. After substracting the susceptibility contribution of the binary oxide, a weak, almost temperature independent susceptibility remained with a room temperature value of 0.097 × 10 –3 cm 3 mol –1 .…”

Section: Resultsmentioning

confidence: 97%

“…Synthesis of such samples either requests sealed high‐melting metal tubes in order to avoid evaporation of ytterbium or proceeds through flux synthesis in low‐melting indium which then acts as reactive flux medium. So far, the indides YbInAu, YbInAu 2 , Yb 2 InAu 2 , YbIn 2 Au, YbIn 4 Au 2 , and Yb 2 In 5 Au 3 have been reported. Pressure‐dependent susceptibility data indicate almost ivalent ytterbium in equiatomic YbInAu .…”

Section: Introductionmentioning

confidence: 99%

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Intermediate‐Valence Intermetallic Phase YbIn_1–xAu_1+x (x = 0‐0.3)†

Grin¹,

Pöttgen

Ormeci³

et al. 2017

Crystal Research and Technology

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Polycrystalline samples YbIn1–xAu1+x were prepared by reaction of the elements in sealed tantalum tubes at 1170 K with a subsequent annealing at 770 K. The crystal structures of YbInAu (space group P6;−2m, a = 7.6992(8), c = 4.0333(5) Å, wR2 = 0.035, 282 reflections and 14 variables) and YbIn0.73Au1.27 (P6;−2m, a = 7.706(3), c = 4.011(1) pm, wR2 = 0.035, 275 reflections, 14 parameters) were refined from single crystal X‐ray diffraction data. The phase YbIn1–xAu1+x has a homogeneity range for 0.0≤x≤0.3 (770 K). The crystal structure of YbInAu contains two gold atoms located in tricapped trigonal prisms [Au1Yb6In3] and [Au2In6Yb3]. The indium position shows mixed occupancy by indium and gold. The main atomic interaction is the ionic one between the ytterbium (charge +1.1 is obtained from the analysis of the electron density within the quantum theory of atoms in molecules) and gold (−1.2 and −1.3) supported by the dative bonding Au→Yb. The effective charge of indium is +0.2. Magnetic susceptibility data indicate intermediate valence for Yb increasing with increasing x. The 197Au Mössbauer spectra show a superposition of the signals for Au1 (δ = 3.31 mm s–1), Au2 (δ = 5.37 mm s–1), and Au(In) indicating auridic character of gold.

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Pressure and temperature dependence of the magnetic susceptibility of some ytterbium compounds with intermediate valence

Cited by 38 publications

References 4 publications

Structure, Chemical Bonding, Magnetic Susceptibility, and155Gd Mössbauer Spectroscopy of the Antiferromagnets GdAgGe, GdAuGe, GdAu0.44(1)In1.56(1), and GdAuIn

Structure, Chemical Bonding, Magnetic Susceptibility, and155Gd Mössbauer Spectroscopy of the Antiferromagnets GdAgGe, GdAuGe, GdAu0.44(1)In1.56(1), and GdAuIn

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Intermediate‐Valence Intermetallic Phase YbIn_1–xAu_1+x (x = 0‐0.3)†

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Pressure and temperature dependence of the magnetic susceptibility of some ytterbium compounds with intermediate valence

Cited by 38 publications

References 4 publications

Structure, Chemical Bonding, Magnetic Susceptibility, and155Gd Mössbauer Spectroscopy of the Antiferromagnets GdAgGe, GdAuGe, GdAu0.44(1)In1.56(1), and GdAuIn

Structure, Chemical Bonding, Magnetic Susceptibility, and155Gd Mössbauer Spectroscopy of the Antiferromagnets GdAgGe, GdAuGe, GdAu0.44(1)In1.56(1), and GdAuIn

Untitled

Intermediate‐Valence Intermetallic Phase YbIn1–xAu1+x (x = 0‐0.3)†

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Intermediate‐Valence Intermetallic Phase YbIn_1–xAu_1+x (x = 0‐0.3)†