NaAl₃(PO₄)₂(OH)₄.2H₂O

This sample of Wardite is displayed in the Smithsonian Museum of Natural History. Wardite is a phosphate mineral of aluminum and sodium with the composition NaAl₃(PO₄)₂(OH)₄.2H₂O. The sample at left is about 6x7 cm and is from Rapid Creek, Yukon Territory, Canada.