Struvite
Mg(NH₄)(PO₄) · 6H₂O

     Struvite is moderately rare at MSH.

PHYSICAL CHARACTERISTICS:

Color is usually white.
Luster is vitreous.
Diaphaneity is transparent to translucent.
Crystal System is orthorhombic, Pmn2₁.
Crystal Habits include powdery masses and triangular crystals.
Cleavage {001} is good and {100} is poor.
Fracture is subconchoidal to uneven.
Hardness is 2.
Specific Gravity is approximately 1.7 g/cm³.
Streak is white.
Associated Minerals include (??).
Distinguishing Features: Crystal habits.
Origin: Named in 1845 after Heinrich Christian Struve (1772-1851),
   Russian diplomatic service.

CLASSIFICATION:

REFERENCES:
Dana 8:747-748 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

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