V2O3

V2O3
Name	Vanadium(III) oxide
Formula	V2O3
Molar mass	149.88 g·mol−1
Appearance	black solid
Density	4.87 g·cm−3
Melting point	1750 °C (decomposes)
Crystal structure	corundum-type (rhombohedral)
Solubility	insoluble in water; soluble in acids

V2O3.

Introduction

V2O3 is an inorganic compound of vanadium and oxygen known as vanadium(III) oxide and appears as a black crystalline solid with a corundum-related lattice. Important in the history of condensed matter research, V2O3 featured prominently in studies by groups associated with Bell Labs, IBM Research, University of Cambridge, and MIT exploring electronic correlations, and has been examined by experimentalists connected to Argonne National Laboratory and theorists at Max Planck Society. Its relevance spans investigations tied to Nobel contexts such as work related to the Nobel Prize in Physics awarded for research into correlated electron systems and techniques developed at facilities like the European Synchrotron Radiation Facility and Brookhaven National Laboratory.

Crystal structure and preparation

V2O3 crystallizes in a corundum-type structure with a rhombohedral unit cell closely related to Al2O3 and was characterized using methods popularized at Harvard University, Stanford University, and University of Oxford facilities employing X-ray diffraction techniques from instruments designed by companies such as Bruker and consortia including CERN-affiliated beamlines. Synthesis routes include reduction of vanadium(V) oxides produced by chemical vendors like Sigma-Aldrich or thermal decomposition of precursor salts studied in laboratories at California Institute of Technology and prepared under atmospheres managed with equipment from Air Liquide or Linde plc. Single crystals have been grown using techniques refined at ETH Zurich and Johns Hopkins University employing chemical vapor transport methods with agents used in protocols from Tokyo Institute of Technology.

Electronic and magnetic properties

The electronic structure of V2O3 was a benchmark for theories developed by researchers at Princeton University, Rutgers University, and the University of California, Berkeley, and has been interrogated with spectroscopies refined at Lawrence Berkeley National Laboratory and interpretive models from groups at the Max Planck Institute for Solid State Research. Strong electron correlations lead to behavior analyzed using frameworks influenced by work at Columbia University and computational methods from teams at IBM Research and Google DeepMind-adjacent collaborations. Magnetic ordering in V2O3 below transition temperatures has been characterized in neutron scattering studies performed at Oak Ridge National Laboratory and interpreted in contexts similar to investigations at Imperial College London and University of Tokyo.

Metal–insulator transition

V2O3 exhibits a temperature- and pressure-driven metal–insulator transition that became a paradigm in studies by researchers affiliated with Bell Labs, Cambridge University Press authors, and theorists at Los Alamos National Laboratory. The transition was probed by techniques pioneered at facilities including Synchrotron Radiation Source infrastructures at DESY and used in experiments comparable to those conducted at SLAC National Accelerator Laboratory. Theoretical explanations drew on methods developed at ETH Zurich, Yale University, and teams that later influenced winners of the Nobel Prize in Physics, and experimental phase diagrams were refined in collaborations involving Columbia University and Northwestern University.

Chemical properties and reactions

Chemically, V2O3 behaves as a reducing oxide that can be oxidized to higher vanadium oxides familiar from syntheses at University of California, Los Angeles and industrial processes run by companies like BASF and DuPont. Reactions with acids and complexing agents have been studied by groups at University of Illinois Urbana-Champaign and reported in journals associated with publishers such as Wiley and Elsevier. Redox chemistry relevant to catalytic cycles has been explored in research programs at California Institute of Technology and in collaborations with researchers from Rice University and University of Pennsylvania.

Applications and technological relevance

V2O3 has been considered in contexts including electronic devices and sensors developed in partnerships among Hitachi, Siemens, and research centers at Toshiba Research Europe; its phase-change behavior has inspired concepts akin to those used by companies such as Intel and Samsung Electronics exploring correlated-electron devices. Studies at Fraunhofer Society and National Institute of Standards and Technology evaluated thin films for potential use in resistive switching and thermochromic applications, while collaborations involving Stanford University and University of Michigan examined integration with oxide heterostructures similar to research involving LaAlO3/SrTiO3 interfaces.

Safety and handling

Handling of V2O3 follows protocols consistent with materials-management programs at institutions like Occupational Safety and Health Administration-guided laboratories and internal safety offices at University of California campuses; safety data sheets provided by suppliers such as Merck and Fisher Scientific recommend use of local exhaust ventilation and personal protective equipment following guidelines from Centers for Disease Control and Prevention and National Institutes of Health. Vanadium compounds are subject to occupational exposure limits set by agencies like National Institute for Occupational Safety and Health and managed in facilities accredited by organizations such as ISO. Waste disposal practices mirror those promulgated by Environmental Protection Agency regulations and university environmental health and safety offices.

Category:Vanadium compounds