Tags: Chemical Substance, Mineral.
Rapidcreekite is a rare mineral with formula Ca2(SO4)(CO3)·4H2O. The mineral is white to colorless and occurs as groupings of acicular (needle-shaped) crystals. It was discovered in 1983 in northern Yukon Canada and described in 1986. Rapidcreekite is structurally and compositionally similar to gypsum.
