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1. Crystal Growth and Physical Properties of Hybrid CoSn–YCo 6 Ge 6 Structure Type Ln x Co 3 (Ge 1–y Sn y ) 3 (Ln = Y, Gd)

   https://doi.org/10.1021/acs.inorgchem.3c02172  

   Bravo, Moisés ; McCandless, Gregory T. ; Baumbach, Ryan E. ; Wang, Yaojia ; Ali, Mazhar N. ; Chan, Julia Y. ( November 2023 , Inorganic Chemistry)
2. It Runs in the BaAl 4 Family: Relating the Structure and Properties of Middle Child Ln 2 Co 3 Ge 5 (Ln = Pr, Nd, and Sm) to its Siblings LnCo 2 Ge 2 and LnCoGe 3

   https://doi.org/10.1021/acs.inorgchem.1c01978  

   Kyrk, Trent M. ; Scheifers, Jan P. ; Thanabalasingam, Kulatheepan ; McCandless, Gregory T. ; Young, David P. ; Chan, Julia Y. ( October 2021 , Inorganic Chemistry)
3. Fantastic n = 4: Ce 5 Co 4+x Ge 13−y Sn y of the A n+1 M n X 3n+1 homologous series

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4. Deviations from Vegard's law in semiconductor thin films measured with X-ray diffraction and Rutherford backscattering: The Ge 1- y Sn y and Ge 1- x Si x cases

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5. Much more to explore with an oxidation state of nearly four: Pr valence instability in intermetallic m -Pr 2 Co 3 Ge 5

   https://doi.org/10.1126/sciadv.adl2818  

   Kyrk, Trent M. ; Kennedy, Ellis R. ; Galeano-Cabral, Jorge ; McCandless, Gregory T. ; Scott, Mary C. ; Baumbach, Ryan E. ; Chan, Julia Y. ( January 2024 , Science Advances)

   For some intermetallic compounds containing lanthanides, structural transitions can result in intermediate electronic states between trivalency and tetravalency; however, this is rarely observed for praseodymium compounds. The dominant trivalency of praseodymium limits potential discoveries of emergent quantum states in itinerant 4f¹systems accessible using Pr⁴⁺-based compounds. Here, we use in situ powder x-ray diffraction and in situ electron energy-loss spectroscopy (EELS) to identify an intermetallic example of a dominantly Pr⁴⁺state in the polymorphic system Pr₂Co₃Ge₅. The structure-valence transition from a nearly full Pr⁴⁺electronic state to a typical Pr³⁺state shows the potential of Pr-based intermetallic compounds to host valence-unstable states and provides an opportunity to discover previously unknown quantum phenomena. In addition, this work emphasizes the need for complementary techniques like EELS when evaluating the magnetic and electronic properties of Pr intermetallic systems to reveal details easily overlooked when relying on bulk magnetic measurements alone.

    

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