Citation: Hughes, J. M.; Drexler, J. W.; Campana, C. F.; Malinconico, M. L. (1988). Howardevansite, NaCuFe2(VO4)3, a new fumarolic sublimate from Izalco volcano, El Salvador: Descriptive mineralogy and crystal structure Note: Displacement ellipsoid for Na1 is not positive-definite. American Mineralogist, 73, pp. 181-186.