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1. Low V _p /V _s Values as an Indicator for Fractures in the Critical Zone

   https://doi.org/10.1029/2023GL105946  

   Flinchum, B A; Grana, D; Carr, B J; Ravichandran, N; Eppinger, B; Holbrook, W S (January 2024, Geophysical Research Letters)

   Abstract Poisson's ratio for earth materials is usually assumed to be positive (V_p/V_s > 1.4). However, this assumption may not be valid in the critical zone because near Earth's surface effective pressures are low (<1 MPa), porosity has a wide range (0%–60%), there are significant texture changes (e.g., unconsolidated vs. fractured media), and saturation ranges from 0% to 100%. We present P‐wave (V_p) and S‐wave (V_s) velocities from seismic refraction profiles collected in weathered crystalline environments in South Carolina and Wyoming. Our data show that ∼20% of the subsurface has negative Poisson's ratios (V_p/V_svalues < 1.4), a conclusion supported by borehole sonic logs. The low V_p/V_svalues are confined to the fractured bedrock and saprolite. Our data support the hypothesis that weathering‐generated microcracks can produce a negative Poisson's ratio and that V_p/V_svalues can thus provide insight into important critical zone weathering processes. 

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2. Exploring the Potential of Nitride and Carbonitride MAX Phases: Synthesis, Magnetic and Electrical Transport Properties of V ₂ GeC, V ₂ GeC _0.5 N _0.5 , and V ₂ GeN

   https://doi.org/10.1021/acs.chemmater.3c02510  

   Kubitza, Niels; Beckmann, Benedikt; Jankovic, Sanja; Skokov, Konstantin; Riaz, Aysha A; Schlueter, Christoph; Regoutz, Anna; Gutfleisch, Oliver; Birkel, Christina S (February 2024, Chemistry of Materials)
3. Tale of Three Molecular Nitrides: Mononuclear Vanadium (V) and (IV) Nitrides As Well As a Mixed-Valence Trivanadium Nitride Having a V ₃ N ₄ Double-Diamond Core

   https://doi.org/10.1021/jacs.2c00276  

   G. Jafari, Mehrafshan; Fehn, Dominik; Reinholdt, Anders; Hernández-Prieto, Cristina; Patel, Prajay; Gau, Michael R.; Carroll, Patrick J.; Krzystek, J.; Liu, Cong; Ozarowski, Andrew; et al (June 2022, Journal of the American Chemical Society)
4. β-V ₂ O ₅ as Magnesium Intercalation Cathode

   https://doi.org/10.1021/acsaem.2c02371  

   Trócoli, Rafael; Parajuli, Prakash; Frontera, Carlos; Black, Ashley P.; Alexander, Grant C. B.; Roy, Indrani; Arroyo-de Dompablo, M. Elena; Klie, Robert F.; Cabana, Jordi; Palacín, M. Rosa (October 2022, ACS Applied Energy Materials)
5. Orbital competition of Mn ³⁺ and V ³⁺ ions in Mn _1+x V _2-x O ₄

   https://doi.org/10.1088/1361-648X/abd9a1  

   Jiao, J L; Zhang, H P; Huang, Q; Wang, W; Sinclair, R; Wang, G; Ren, Q; Lin, G T; Huq, A; Zhou, H D; et al (January 2021, Journal of Physics: Condensed Matter)

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