Other sulfate carbonates include susannite , leadhillite , hanksite , macphersonite , wherryite and caledonite . The fact that schrockingerite is a uranyl sulfate carbonate though makes it very rare. Schrockingerite forms as a secondary mineral and is also found on cave and mine walls. Color is yellow-green. Luster is vitreous to pearly.
Crystals are transparent to translucent.
Crystal System is triclinic. Crystal Habits include pseudohexagonal platy crystals and encrustations. Cleavage is perfect in one direction. Hardness is 2.5. Streak is slightly off-white.