© Doug Merson
Phosinaite-(Ce), formerly UK # 64, is another rare species at MSH. Phosinaite-(Ce) crystals are usually covered by a brownish film masking the true colour of the crystals.
Color is usually colorless to light brown.
Luster is vitreous.
Diaphaneity is transparent.
Crystal System is orthorhombic; 22
Crystal Habits include fibres and thin acicular needles.
Cleavage  is perfect,  and  are indistinct.
Fracture is (??).
Hardness is 3.5
Specific Gravity is approximately 2.97 g/cm
Streak is white.
Associated Minerals include eudialyte, fluorite, steenstrupine,
thermonatrite, ussingite, villiaumite and vuonnemite.
Distinguishing Features: Crystal habit.
Origin: Named in 1974 to reflect its composition: phosphorus, silicon
AmMin 60:488 (1975)
DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE: