“…Like all pyroxenes, the most prominent structural feature of diopside is characterized by parallel chains of corner-sharing silicon tetrahedra (Si) aligned along the c axis and linked through their apices to edge-sharing chains of CaO 8 and MgO 6 polyhedra. A large number of researches focused on the relations between microscopic quantities, including bond length [6,7], bond angle [8,9], vibration [10,11], phase transformation [12,13], and macroscopic quantities, such as temperature [14,15], pressure [16,17], and its dopant [18,19], have been done by many researchers through experiments and simulations.…”