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We report about three bismuth sulfates from mineralized quartz dikes from Alfenza (Crodo, Italy), two new phases and a rare mineral, cannonite, all growing on bismuthinite. The first new phase occurs as white, “hortensia-like” aggregates of pseudo-hexagonal platelets, with perfect basal cleavage,  ~ 20 μm wide and few micrometers thick. The approximate composition is Bi 2 O 2 (SO 4 ), and cell parameters and symmetry, as determined by automatic diffraction tomography, are  a  = 22.0(4),  b  = 16.7(3),  c  = 15.9(3) Å, β = 102.9(5)°, space group  Pc  or  P 2/ c . A major stacking disorder is detected by HR-SEM images and electron diffraction data.

The Bi sulfates from the Alfenza Mine, Crodo, Italy: An automatic electron diffraction tomography (ADT) study