Terahertz Spectroscopy on Pyrite

Pyrite is identifiable. The Iron (II) disulfide [FeS2] structure becomes isoclinic with minimal tetragonal [CuFeS2], orthorhombic [FeS2], or monoclinic [AsFeS2] forms. Physical examination validates crystal structure and composition. A tetragonal, pale brassy yellow, 6.0 Moh’s hardness, indistinct cleavage, 4.68 g/cm3 specific gravity, metallic luster, and green streak indicates isoclinic structure. Terahertz spectroscopy demonstrates data about the internal chemical lattice with repeatable spectra, 2.25 angstroms (Rfactor = 2.3%) across the iron-sulfur bond. Sequential analysis below provides a background about terahertz with crystallography, respective diagnostics, along with measures for terahertz scientists.