Dielectric behaviors at microwave frequencies and Mössbauer effects of chalcedony, agate, and zultanite*
Paralı Leventa)†, Şabikoǧlu İsrafilb), Tucek Jiric), Pechousek Jiric), Novak Petrc), Navarik Jakubc)
       
Room-temperature Mössbauer spectrum of the agate sample. The inset shows schematic representation of iron islands in the crystal structure of agate (O atoms are omitted for the sake of clarity).