SrCO₃

At MSH, strontianite is a rare mineral species in igneous breccia cavities and hornfels. It displays weak white fluorescence under SW and LW.

PHYSICAL CHARACTERISTICS:

Color varies from colorless to white.
Luster is vitreous to silky.
Diaphaneity is transparent to translucent, opaque on white crystals.
Crystal System is orthorhombic; Pmcn.
Crystal Habits include the sharp tabular twinned crystals to 4 mm and
radiating sprays of acicular crystals to 12mm in length.
Cleavage {110} is almost perfect.
Fracture is uneven to subconchoidal.
Hardness is 3.5
Specific Gravity is approximately 3.8 g/cm³.
Streak is white.
Associated Minerals include aegirine, amphibole group, analcime,
calcite, catapleiite, chlorite group, donnayite, fluorite, harmotome,
marcasite, natrolite, pyrite, pyrrhotite, rhodochrosite, siderite,
titanite and vinogradovite.
Distinguishing Features: Crystal habit.
Origin: Named in 1791 after the town in Scotland where the mineral
was found.

CLASSIFICATION:

REFERENCES:
MinRec 21:341 (1990), Dana 8:445-446 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH          PE          AP          MX          SS           MC          HF           BR          SX          FR
¤¤¤            —             —             —             —             ¤¤            ¤¤            ¤¤             —             —  

Legend