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Mineralpedia Details for Strontianite

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Strontianite

Strontianite

This mineral and the strontium in its composition are named for the village Strontian, Scotland where the first noted occurrence and type locality of Strontianite is. Strontianite is an uncommon mineral the forms in low-temperature hydrothermal veins in limestones, marls, and chalk. It can also be found in geodes and concretions and may occur rarely in hydrothermal metallic veins, although it is quite common in carbonatites. There are hundreds of known localities for strontianite. Strontianite may be thermoluminescent when heated and is fluorescent and phosphorsecent under ultraviolet light and may even be cathodoluminescent under X-rays and electron beams.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/strontianite.pdf

Formula
SrCO3 
Crystal System
Orthorhombic 
Crystal Habit
Pseudo Hexagonal, Columnar, Massive - Granular 
Cleavage
Good, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, greenish, gray, gray white, yellowish 
Streak
white 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
3.5 
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Strontianite from Oberdorf, Styria, Austria

Strontianite
            from Oberdorf, Styria, Austria

Strontianite crystals from this locality are the standard. The pseudohexagonal crystals measure up to 1.7cm and have orange brown terminations.

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Strontianite from Rosiclare, Hardin Co., Illinois, United States

Strontianite
            from Rosiclare, Hardin Co., Illinois, United States

Fans of pointed, long crystals to 1.5cm with Calcite on Blue Fluorite.

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Strontianite from Knoxville, Marion Co., Iowa, United States

Strontianite
            from Knoxville, Marion Co., Iowa, United States

White acicular crystals of Strontianite to 2mm in 5-10mm areas with a rather aesthetic group of scalenohedral Calcite crystals.

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