Citation: Bonaccorsi, E.; Merlino, S.; Orlandi, P.; Pasero, M.; Vezzalini, G. (1994). Quadridavyne, [(Na,K)6Cl2][Ca2Cl2][Si6Al6O24], a new feldspathoid mineral from Vesuvius area Note: Cl1 y-coordinate altered. European Journal of Mineralogy, 6, pp. 481-487.