NaCaBeSi₂O₆F

This sample of leucophanite is displayed in the Smithsonian Museum of Natural History. Leucophanite is a silicate mineral which contains beryllium and fluorine with the composition NaCaBeSi₂O₆F. The sample at left is about 6x9 cm across and is from Langesundsfjord, Norway. The sample is described as leucophane with aegirine. Leucophane is a synonym of leucophanite, but Mindat indicates that leucophanite is the current name.