Mineralogical analysis of the Ac-H-6 Haulani quadrangle of the dwarf planet Ceres

•The most prominent surface feature in quadrangle Ac-H-6 is crater Haulani.•Negative visual to near-infrared spectral slopes are observed in crater Haulani'ejecta and in other small unnamed craters.•Mg- and NH4-phyllosilicates are depleted in crater Haulani's floor and bright ejecta.•Mg- and NH4-bearing mineral phases correlate only in Haulani crater's area.•Ca- and Na-carbonates are most abundant in bright material found in crater Haulani.