Minerals
Pezzottaite-(Cs)
pezzottaite-(Cs)
Cs(Be2Li)Al2(Si6O18)
Pezzottaite-(Cs): Mineral information, data and localities. — via www.mindat.org · Source
Overview
Pezzottaite, marketed under the name raspberyl or raspberry beryl, is a mineral species first recognized by the International Mineralogical Association in September 2003. Pezzottaite is a caesium analogue of beryl, a silicate of caesium, beryllium, lithium and aluminium, with the chemical formula Cs(Be2Li)Al2Si6O18. Named after Italian geologist and mineralogist Federico Pezzotta, pezzottaite was first thought to be either red beryl or a new variety of beryl ("caesium beryl"); unlike actual beryl, however, pezzottaite contains lithium and crystallizes in the trigonal crystal system rather than the hexagonal system.
Identification characteristics
- Mohs hardness 8