LIOTTITE
Class : Silicates
Subclass : Tectosilicates
Crystal system : Hexagonal
Chemistry : (Na,K)16Ca8(Al6Si6O24)3(SO4)5Cl4
Rarity : Very rare
Liottite is an extremely rare silicate from the cancrinite group which is only known in the cavities of metasomatized limestone blocks in Italian trachytic pumice deposits. It was named in honor of Italian mineral collector Luciano Liotti who discovered the mineral. Liottite forms colorless, flattened hexagonal crystals measuring up to 1 cm in diameter.
Main photo : Liottite from Mt Saliette, Valentano, Viterbo Province, Lazio, Italy © Gianfranco Ciccolini
Liottite in the World
Twinning
No twin known for this mineral species.
Fakes and treatments
No fakes recorded for this mineral species.
Hardness : 5
Density : 2.56
Fracture : Undetermined
Streak : White
TP : Translucent to transparent
RI : 1.528 to 1.530
Birefringence : 0.002
Optical character : Uniaxial -
Pleochroism : None
Fluorescence : None
Solubility : -
Magnetism : NoneRadioactivity : None