Trikalsilite
Trikalsilite is an IMA-recognized mineral species in the silicate class, with the chemical formula K₂NaAl₃(SiO₄)₃.
It crystallizes in the hexagonal crystal system (space group P6_3). It is a member of the Tridymite-Nepheline structural group.
IMA symbol Tks, grandfathered status — known before the IMA’s founding, named in 1957.
Found in lava.
It is found associated with Nepheline, kalsilite.
The name refers to the length of the [100] axis, three times that of kalsilite.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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