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1. Crystal Growth and Magnetic Properties of Pr ₃ Co _2+x Ge ₇ and the Sn-Stabilized Ln ₃ Co _2+x Ge _7–y Sn _y (Ln = Pr, Nd, Sm)

   https://doi.org/10.1021/acs.cgd.8b00868  

   Khan, Mojammel A.; McCandless, Gregory T.; Benavides, Katherine A.; Martin, Thomas J.; Palacios, Adzuira M.; Samuel, Anthony W.; Young, David P.; Chan, Julia Y. (September 2018, Crystal Growth & Design)
2. Sn-Segregation Behavior and Its Suppression in Ge _1–y Sn _y Semiconductor Alloys with y > 0.20

   https://doi.org/10.1021/acs.cgd.5c01532  

   Ringwala, Dhruve A; Roldan, Manuel A; Samarasingha, Nuwanjula S; Zollner, Stefan; Menéndez, José; Kouvetakis, John (April 2026, Crystal Growth & Design)
3. Unexpected dispersion-stabilized tris(terphenylthiolate) complexes, Ln(SAr ^iPr6 ) ₃ , arising from two-electron reduction by Ln(SAr ^iPr6 ) ₂ [Ar ^iPr6 = C ₆ H ₃ -2,6-(C ₆ H ₂ -2,6,4- ⁱ Pr ₃ ) ₂ ]

   https://doi.org/10.1039/D6SC00248J  

   Luevano, Makayla R; Stennett, Cary R; Ma, Eric; Ziller, Joseph W; Furche, Filipp; Evans, William J (April 2026, Chemical Science)

   Attractive London dispersion effects were found to be responsible forca.half of the dissociation energy of the thiolate ligands in the first examples of M(EAr^iPr6)₃complexes of any metal with any donor [Ar^iPr6= C₆H₃-2,6-(C₆H₂-2,4,6-ⁱPr₃)₂]. 

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4. High Voltage Irreversibilities in NASICON Na _3+y V _2–y Mg _y (PO ₄ ) ₃ Cathodes

   https://doi.org/10.1021/acs.chemmater.5c01434  

   Gonzalez-Correa, Eliovardo; Mazumder, Madhulika; Kumar, Keshav; Ghosh, Subham; Senguttuvan, Premkumar; Clément, Raphaële J (August 2025, Chemistry of Materials)

   Na3+yV2-yMgy(PO4)3 (0 ≤ y ≤ 1) NASICON compounds, thanks to their relative simplicity and the presence of a single redox-active species, are of interest for understanding the function and limitations of more complex, mixed transition metal NASICON-type Na-ion cathodes. Partial Mg substitution for V in Na3+yV2-yMgy(PO4)3 leads to a gradual transition from a two-phase to a solid solution Na (de)intercalation mechanism during electrochemical cycling. When cycled over a narrow voltage window (3.8 – 2.75 V vs. Na+/Na0), these cathodes exhibit good structural and electrochemical reversibility, leading to a high capacity retention. Yet, when the upper cutoff voltage is increased from 3.8 V to 4.2 V, significant irreversibilities arise, accompanied by a notable evolution of the electrochemical profiles during the first cycle. We focus here on the y = 0.5 and 1 compounds and use a combination of electrochemical testing, advanced characterization, and first principles density functional theory calculations to investigate the redox and structural processes taking place at high potentials. In-situ and ex-situ X-ray diffraction, and 23Na and 31P solid-state NMR reveal bulk structural rearrangements, at least partly caused by Na extraction from Na(1) sites. For the y = 1 cathode, an irreversible phase transition leads to a change in the symmetry of the crystal structure from rhombohedral to monoclinic. For both compounds, substantial distortions of the VO6 octahedra and irreversible changes to the local structure are observed using X-ray absorption spectroscopy during high voltage cycling, but our 51V NMR results show no evidence for V migration. Instead, first principles nudged elastic band calculations suggest low energy migration pathways for Mg2+ into vacant face-sharing Na(1) sites at high states of charge. These findings are consistent with the significant evolution of the electrochemical profile during the first cycle, voltage hysteresis, and subsequent rapid capacity decay. More broadly, these results could suggest similar structural rearrangements (e.g., Mn migration) in related V- and Mn-containing NASICON cathodes, which also show poor reversibility when cycled up to high potentials. 

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5. Ca ₂ Ga ₄ Ge ₆ and Ca ₃ Ga ₄ Ge ₆ : Synthesis, Structure, and Electronic Properties

   https://doi.org/10.1002/zaac.202100342  

   Hodge, Kelsey L; Davis, H Olivia; Koster, Karl G; Windl, Wolfgang; Moore, Curtis E; Goldberger, Joshua E (August 2022, Zeitschrift für anorganische und allgemeine Chemie)

   Abstract During the search for transition metal‐free alkyne hydrogenation catalysts, two new ternary Ca−Ga−Ge phases, Ca₂Ga₄Ge₆(Cmc2₁, a=4.1600(10) Å, b=23.283(5) Å, c=10.789(3) Å) and Ca₃Ga₄Ge₆(C2/m, a=24.063(2) Å, b=4.1987(4) Å, c=10.9794(9) Å, β=91.409(4)°), were discovered. These compounds are isostructural to the previously established Yb₂Ga₄Ge₆and Yb₃Ga₄Ge₆analogues, and according to Zintl‐Klemm counting rules, consist of anionic [Ga₄Ge₆]⁴⁻and [Ga₄Ge₆]⁶⁻frameworks in which every Ga and Ge atom would have a formal octet with no Ga−Ga or Ga−Ge π‐bonding. These compounds are metallic, based on temperature dependent electrical resistivity and thermopower measurements for Ca₃Ga₄Ge₆, along with density functional theory calculations for both phases. Unlike the highly active 13‐layer trigonal CaGaGe phase, these new compounds exhibit minimal activity in the semi/full alkyne hydrogenation of phenylacetylene, which is consistent with previous observations that the lack of a formal octet for framework atoms is essential for catalysis in these Zintl‐Klemm compounds. 

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