constituted a separate phase of matter, modern science defines its unique features through its magnetic and structural behavior: : The defining feature of
). Historically considered a distinct allotrope, it is now primarily viewed as the high-temperature, paramagnetic form of ferrite. Key Features and Characteristics While it was once debated whether beta iron
, it undergoes a true allotropic transformation into Austenite ( ), which has a Face-Centered Cubic (FCC) structure. constituted a separate phase of matter, modern science
: Because it shares the BCC structure with alpha iron, it possesses similar mechanical properties, though it is slightly less dense due to thermal expansion at higher temperatures. Technical Comparison of Iron Phases Common Name Crystal Structure Magnetic State Temperature Range Alpha ( ) Ferromagnetic Beta ( ) Beta Iron BCC Paramagnetic Gamma ( ) Non-magnetic Delta ( ) Delta Ferrite Non-magnetic (PDF) The Beta Iron Controversy Revisited - ResearchGate : Because it shares the BCC structure with
: It maintains the Body-Centered Cubic (BCC) lattice structure of . Unlike other transformations (like α→γalpha right arrow gamma