The unidentified mineral UK63 from Mont Saint-Hilaire has been shown to be the natural analogue of NaLi 2 PO 4 . Color is white, very pale blue or very pale yellow. Luster is vitreous. Diaphaneity is transparent to translucent. Crystal Habits include anhedral to subhedral blocky grains to 2mm and as irregular grains 0.2mm in clusters.
Fracture is uneven.
Streak is white.