Different origins of green-light photoluminescence emission in structurally ordered and disordered powders of calcium molybdate - Longo, Valéria Moraes; Figueiredo, Alberthmeiry T.; Campos, Adaci B.; Espinosa, Jose W. M.; Hernandes, Antônio Carlos; Taft, C. A.; Sambrano, Julio R.; Varela, José A.; Longo, Elson (Journal of Physical Chemistry A, 2008)