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Seidlmayer, Eva

doi:10.1007/978-3-658-20259-0

Cited by 2 publications

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“…There have been only five lanthanide thiopyrophosphates reported to date, KErP 2 S 7 , KSmP 2 S 7 , and TlLnP 2 S 7 (Ln = Ce, Pr, Nd) . All five compounds belong to the same structure type and crystallize, depending on the crystallographic setting, in the P 2 1 / c or P 2 1 / a space group.…”

Section: Introductionmentioning

confidence: 99%

Size-Driven Stability of Lanthanide Thiophosphates Grown from an Iodide Flux

et al. 2019

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To determine the influence of the lanthanide size on the structures and properties of thiophosphates, a thiophosphate series containing different lanthanides was synthesized via high temperature flux crystal growth and their structures and physical properties analyzed and compared. Layered thiohypophosphates NaLnP 2 S 6 (Ln = La, Ce, Pr) and thiopyrophosphates CsLnP 2 S 7 (Ln = Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Yb, Y) were grown out of an iodide flux using consistent reaction conditions across both series. Under the mildly reducing iodide flux reaction conditions, a rather rare example of phosphorus reduction from the +5 to the +4 oxidation state was observed. Both resultant structure types are based on lanthanide thiophosphate sheets with the alkali cations located between them. Magnetic susceptibility measurements were conducted and revealed Curie−Weiss behavior of the samples, with a Van Vleck contribution in the CsSmP 2 S 7 sample. UV−vis data was found to be in good agreement with the literature, indicating little influence of the sulfide environment on the localized 4f orbitals.

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Section: Introductionmentioning

confidence: 99%

Size-Driven Stability of Lanthanide Thiophosphates Grown from an Iodide Flux

et al. 2019

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“…These materials which crystallize in extremely divers crystal structure types attracted much attention for their potentially useful properties, such as magnetism, ferroelectricity, photoluminescence, nonlinear optics, thermoelectricity, electrocatalysis, ionic conductivity, or reversible redox chemistry . Among the thiohypodiphosphate materials, the quaternary compounds A + M 3+ ( P 2 S 6 ) ( A = Li, Na, K, Rb, Cs, Tl, Cu, Ag and M = Al, Sc, V, Cr, Y, In, Sb, La, Ce, Pr, Sm, Tb, Er, Yb, Lu, Bi···) − were the most intensively studied with 38 representatives in the ICSD database followed by the ternary compounds containing divalent cations M 2 2+ ( P 2 S 6 ) ( M = Mg, Ca, Ba, V, Mn, Fe, Co, Ni, Zn, Pd, Cd, Hg, Sn, Pb, Eu···) − with 19 representatives. Ternary thiohypodiphosphate were also reported for monovalent- A 4 + ( P 2 S 6 ) ( A = Li, Na, K, Rb, Cs, Tl, Cu, and Ag), − trivalent- M 4/3 3+ ( P 2 S 6 ) ( M = Al, In, Ga···), , and tetravalent-cations M 4+ ( P 2 S 6 ) ( M = Ti, Zr, Hf, Sn, Th, U···). − Many quaternary compounds of the general formula A 2 + M 2+ ( P 2 S 6 ) ( A = Li, K, Rb, Cs, Ag and M = Mg, Mn, Fe, Ni, Zn, Pd···) − were reported in the literature as well.…”

Section: Introductionmentioning

confidence: 99%

Crystal Structure and Ionic Conductivity of Na₂MnP₂S₆

Ben Yahia,

Motohashi,

Mori

et al. 2024

J. Phys. Chem. C

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Green needlelike single crystals of Na 2 MnP 2 S 6 were grown by crystallization after melting a mixture of Na 2 S, Mn, and P 2 S 5 . The crystal structure of the new compound was determined from single-crystal X-ray diffraction data. The chemical composition was confirmed by energy-dispersive X-ray spectroscopy, and the ionic conductivity was measured using electrochemical impedance spectroscopy. Na 2 MnP 2 S 6 crystallizes in the orthorhombic system, space group Pbcn (no. 60) with a = 7.3850(6) Å, b = 21.6682(13) Å, c = 6.2495(4) Å, V = 1000.04(12) Å 3 , and Z = 4. The Na and Mn atoms are octahedrally coordinated to the S atoms. They form [Na 2 MnS 6 ] 8− honeycomb-like structure within which P−P dimer units are located. Two of the three sodium atomic positions are partially occupied. The group-subgroup transformations emphasized a strong relationship with the P3̅ m1-Li 4 P 2 S 6 structure. Indeed, 4Li atoms were replaced by 2Na, Mn, and □ (□: vacancy), and half of the P−P dimer units have the same distribution within the tunnels. The new cationic ordering is at the origin of the trigonal to orthorhombic symmetry transformation (P3̅ m1 to Pbcn). The ionic conductivity of Na 2 MnP 2 S 6 is 6.2 × 10 −7 S cm −1 (Ea = 0.41 eV) at 31 °C.

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Über Denken und Handeln

Cited by 2 publications

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Size-Driven Stability of Lanthanide Thiophosphates Grown from an Iodide Flux

Size-Driven Stability of Lanthanide Thiophosphates Grown from an Iodide Flux

Crystal Structure and Ionic Conductivity of Na₂MnP₂S₆

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Über Denken und Handeln

Cited by 2 publications

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Size-Driven Stability of Lanthanide Thiophosphates Grown from an Iodide Flux

Size-Driven Stability of Lanthanide Thiophosphates Grown from an Iodide Flux

Crystal Structure and Ionic Conductivity of Na2MnP2S6

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Crystal Structure and Ionic Conductivity of Na₂MnP₂S₆