Hexacelsian is a rare barium silicate mineral with the formula BaAl2Si2O8. It was discovered in the Hatrurim Basin in Israel,[2] where the Hatrurim Formation of rocks formed due to exposed pyrometamorphism.[4]
Hexacelsian | |
---|---|
General | |
Category | Silicate |
Formula (repeating unit) | BaAl2Si2O8 |
IMA symbol | Hcls[1] |
Crystal system | Hexagonal |
Crystal class | Dihexagonal dipyramidal (6/mmm) H-M symbol: (6/m 2/m 2/m) |
Space group | P63/mcm |
Unit cell | a = 5.29, c = 15.56 [Å] (approximated) |
Identification | |
References | [2][3] |
As suggested by its name, hexacelsian is related to celsian. This relation is polymorphous (celsian, a feldspar-group mineral, is monoclinic).[5] Beside celsian, it is chemically similar to cymrite.[3]