Minerals
Ikranite
ikranite
(Na,H3O)15(Ca,Mn²⁺)6Fe³⁺2Zr3[(H0-3Si3O9)2(Si9O27)2SiO]Cl·nH2O
Ikranite: Mineral information, data and localities. — via www.mindat.org · Source
Overview
Ikranite is a member of the eudialyte group, named after the Shubinov Institute of Crystallography of the Russian Academy of Sciences. It is a cyclosilicate mineral that shows trigonal symmetry with the space group R3m, and is often seen with a pseudo-hexagonal habit. Ikranite appears as translucent and ranges in color from yellow to a brownish yellow. This mineral ranks a 5 on Mohs scale of mineral hardness, though it is considered brittle, exhibiting conchoidal fracture when broken.
Identification characteristics
- Mohs hardness 5