1) Trigonal mineral
Found on
https://www.crosswordclues.com/clue/eucryptite
Eucryptite is a lithium bearing aluminium silicate mineral with formula LiAlSiO4. It crystallizes in the trigonal - rhombohedral crystal system. It typically occurs as granular to massive in form and may pseudomorphically replace spodumene. It has a brittle to conchoidal fracture and indistinct cleavage. It is transparent to translucent and varies...
Found on
http://en.wikipedia.org/wiki/Eucryptite
a mineral, lithium aluminum silicate, LiAlSiO, occurring in colorless to white hexagonal crystals: used as a source of lithium.
Found on
https://www.infoplease.com/dictionary/eucryptite
No exact match found.
